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15 Literature Review Examples

literature review examples, types, and definition, explained below

Literature reviews are a necessary step in a research process and often required when writing your research proposal . They involve gathering, analyzing, and evaluating existing knowledge about a topic in order to find gaps in the literature where future studies will be needed.

Ideally, once you have completed your literature review, you will be able to identify how your research project can build upon and extend existing knowledge in your area of study.

Generally, for my undergraduate research students, I recommend a narrative review, where themes can be generated in order for the students to develop sufficient understanding of the topic so they can build upon the themes using unique methods or novel research questions.

If you’re in the process of writing a literature review, I have developed a literature review template for you to use – it’s a huge time-saver and walks you through how to write a literature review step-by-step:

Get your time-saving templates here to write your own literature review.

Literature Review Examples

For the following types of literature review, I present an explanation and overview of the type, followed by links to some real-life literature reviews on the topics.

1. Narrative Review Examples

Also known as a traditional literature review, the narrative review provides a broad overview of the studies done on a particular topic.

It often includes both qualitative and quantitative studies and may cover a wide range of years.

The narrative review’s purpose is to identify commonalities, gaps, and contradictions in the literature .

I recommend to my students that they should gather their studies together, take notes on each study, then try to group them by themes that form the basis for the review (see my step-by-step instructions at the end of the article).

Example Study

Title: Communication in healthcare: a narrative review of the literature and practical recommendations

Citation: Vermeir, P., Vandijck, D., Degroote, S., Peleman, R., Verhaeghe, R., Mortier, E., … & Vogelaers, D. (2015). Communication in healthcare: a narrative review of the literature and practical recommendations. International journal of clinical practice , 69 (11), 1257-1267.

Source: https://onlinelibrary.wiley.com/doi/pdf/10.1111/ijcp.12686  

Overview: This narrative review analyzed themes emerging from 69 articles about communication in healthcare contexts. Five key themes were found in the literature: poor communication can lead to various negative outcomes, discontinuity of care, compromise of patient safety, patient dissatisfaction, and inefficient use of resources. After presenting the key themes, the authors recommend that practitioners need to approach healthcare communication in a more structured way, such as by ensuring there is a clear understanding of who is in charge of ensuring effective communication in clinical settings.

Other Examples

  • Burnout in United States Healthcare Professionals: A Narrative Review (Reith, 2018) – read here
  • Examining the Presence, Consequences, and Reduction of Implicit Bias in Health Care: A Narrative Review (Zestcott, Blair & Stone, 2016) – read here
  • A Narrative Review of School-Based Physical Activity for Enhancing Cognition and Learning (Mavilidi et al., 2018) – read here
  • A narrative review on burnout experienced by medical students and residents (Dyrbye & Shanafelt, 2015) – read here

2. Systematic Review Examples

This type of literature review is more structured and rigorous than a narrative review. It involves a detailed and comprehensive plan and search strategy derived from a set of specified research questions.

The key way you’d know a systematic review compared to a narrative review is in the methodology: the systematic review will likely have a very clear criteria for how the studies were collected, and clear explanations of exclusion/inclusion criteria. 

The goal is to gather the maximum amount of valid literature on the topic, filter out invalid or low-quality reviews, and minimize bias. Ideally, this will provide more reliable findings, leading to higher-quality conclusions and recommendations for further research.

You may note from the examples below that the ‘method’ sections in systematic reviews tend to be much more explicit, often noting rigid inclusion/exclusion criteria and exact keywords used in searches.

Title: The importance of food naturalness for consumers: Results of a systematic review  

Citation: Roman, S., Sánchez-Siles, L. M., & Siegrist, M. (2017). The importance of food naturalness for consumers: Results of a systematic review. Trends in food science & technology , 67 , 44-57.

Source: https://www.sciencedirect.com/science/article/pii/S092422441730122X  

Overview: This systematic review included 72 studies of food naturalness to explore trends in the literature about its importance for consumers. Keywords used in the data search included: food, naturalness, natural content, and natural ingredients. Studies were included if they examined consumers’ preference for food naturalness and contained empirical data. The authors found that the literature lacks clarity about how naturalness is defined and measured, but also found that food consumption is significantly influenced by perceived naturalness of goods.

  • A systematic review of research on online teaching and learning from 2009 to 2018 (Martin, Sun & Westine, 2020) – read here
  • Where Is Current Research on Blockchain Technology? (Yli-Huumo et al., 2016) – read here
  • Universities—industry collaboration: A systematic review (Ankrah & Al-Tabbaa, 2015) – read here
  • Internet of Things Applications: A Systematic Review (Asghari, Rahmani & Javadi, 2019) – read here

3. Meta-analysis

This is a type of systematic review that uses statistical methods to combine and summarize the results of several studies.

Due to its robust methodology, a meta-analysis is often considered the ‘gold standard’ of secondary research , as it provides a more precise estimate of a treatment effect than any individual study contributing to the pooled analysis.

Furthermore, by aggregating data from a range of studies, a meta-analysis can identify patterns, disagreements, or other interesting relationships that may have been hidden in individual studies.

This helps to enhance the generalizability of findings, making the conclusions drawn from a meta-analysis particularly powerful and informative for policy and practice.

Title: Cholesterol and Alzheimer’s Disease Risk: A Meta-Meta-Analysis

Citation: Sáiz-Vazquez, O., Puente-Martínez, A., Ubillos-Landa, S., Pacheco-Bonrostro, J., & Santabárbara, J. (2020). Cholesterol and Alzheimer’s disease risk: a meta-meta-analysis. Brain sciences, 10(6), 386.

Source: https://doi.org/10.3390/brainsci10060386  

O verview: This study examines the relationship between cholesterol and Alzheimer’s disease (AD). Researchers conducted a systematic search of meta-analyses and reviewed several databases, collecting 100 primary studies and five meta-analyses to analyze the connection between cholesterol and Alzheimer’s disease. They find that the literature compellingly demonstrates that low-density lipoprotein cholesterol (LDL-C) levels significantly influence the development of Alzheimer’s disease.

  • The power of feedback revisited: A meta-analysis of educational feedback research (Wisniewski, Zierer & Hattie, 2020) – read here
  • How Much Does Education Improve Intelligence? A Meta-Analysis (Ritchie & Tucker-Drob, 2018) – read here
  • A meta-analysis of factors related to recycling (Geiger et al., 2019) – read here
  • Stress management interventions for police officers and recruits (Patterson, Chung & Swan, 2014) – read here

Other Types of Reviews

  • Scoping Review: This type of review is used to map the key concepts underpinning a research area and the main sources and types of evidence available. It can be undertaken as stand-alone projects in their own right, or as a precursor to a systematic review.
  • Rapid Review: This type of review accelerates the systematic review process in order to produce information in a timely manner. This is achieved by simplifying or omitting stages of the systematic review process.
  • Integrative Review: This review method is more inclusive than others, allowing for the simultaneous inclusion of experimental and non-experimental research. The goal is to more comprehensively understand a particular phenomenon.
  • Critical Review: This is similar to a narrative review but requires a robust understanding of both the subject and the existing literature. In a critical review, the reviewer not only summarizes the existing literature, but also evaluates its strengths and weaknesses. This is common in the social sciences and humanities .
  • State-of-the-Art Review: This considers the current level of advancement in a field or topic and makes recommendations for future research directions. This type of review is common in technological and scientific fields but can be applied to any discipline.

How to Write a Narrative Review (Tips for Undergrad Students)

Most undergraduate students conducting a capstone research project will be writing narrative reviews. Below is a five-step process for conducting a simple review of the literature for your project.

  • Search for Relevant Literature: Use scholarly databases related to your field of study, provided by your university library, along with appropriate search terms to identify key scholarly articles that have been published on your topic.
  • Evaluate and Select Sources: Filter the source list by selecting studies that are directly relevant and of sufficient quality, considering factors like credibility , objectivity, accuracy, and validity.
  • Analyze and Synthesize: Review each source and summarize the main arguments  in one paragraph (or more, for postgrad). Keep these summaries in a table.
  • Identify Themes: With all studies summarized, group studies that share common themes, such as studies that have similar findings or methodologies.
  • Write the Review: Write your review based upon the themes or subtopics you have identified. Give a thorough overview of each theme, integrating source data, and conclude with a summary of the current state of knowledge then suggestions for future research based upon your evaluation of what is lacking in the literature.

Literature reviews don’t have to be as scary as they seem. Yes, they are difficult and require a strong degree of comprehension of academic studies. But it can be feasibly done through following a structured approach to data collection and analysis. With my undergraduate research students (who tend to conduct small-scale qualitative studies ), I encourage them to conduct a narrative literature review whereby they can identify key themes in the literature. Within each theme, students can critique key studies and their strengths and limitations , in order to get a lay of the land and come to a point where they can identify ways to contribute new insights to the existing academic conversation on their topic.

Ankrah, S., & Omar, A. T. (2015). Universities–industry collaboration: A systematic review. Scandinavian Journal of Management, 31(3), 387-408.

Asghari, P., Rahmani, A. M., & Javadi, H. H. S. (2019). Internet of Things applications: A systematic review. Computer Networks , 148 , 241-261.

Dyrbye, L., & Shanafelt, T. (2016). A narrative review on burnout experienced by medical students and residents. Medical education , 50 (1), 132-149.

Geiger, J. L., Steg, L., Van Der Werff, E., & Ünal, A. B. (2019). A meta-analysis of factors related to recycling. Journal of environmental psychology , 64 , 78-97.

Martin, F., Sun, T., & Westine, C. D. (2020). A systematic review of research on online teaching and learning from 2009 to 2018. Computers & education , 159 , 104009.

Mavilidi, M. F., Ruiter, M., Schmidt, M., Okely, A. D., Loyens, S., Chandler, P., & Paas, F. (2018). A narrative review of school-based physical activity for enhancing cognition and learning: The importance of relevancy and integration. Frontiers in psychology , 2079.

Patterson, G. T., Chung, I. W., & Swan, P. W. (2014). Stress management interventions for police officers and recruits: A meta-analysis. Journal of experimental criminology , 10 , 487-513.

Reith, T. P. (2018). Burnout in United States healthcare professionals: a narrative review. Cureus , 10 (12).

Ritchie, S. J., & Tucker-Drob, E. M. (2018). How much does education improve intelligence? A meta-analysis. Psychological science , 29 (8), 1358-1369.

Roman, S., Sánchez-Siles, L. M., & Siegrist, M. (2017). The importance of food naturalness for consumers: Results of a systematic review. Trends in food science & technology , 67 , 44-57.

Sáiz-Vazquez, O., Puente-Martínez, A., Ubillos-Landa, S., Pacheco-Bonrostro, J., & Santabárbara, J. (2020). Cholesterol and Alzheimer’s disease risk: a meta-meta-analysis. Brain sciences, 10(6), 386.

Vermeir, P., Vandijck, D., Degroote, S., Peleman, R., Verhaeghe, R., Mortier, E., … & Vogelaers, D. (2015). Communication in healthcare: a narrative review of the literature and practical recommendations. International journal of clinical practice , 69 (11), 1257-1267.

Wisniewski, B., Zierer, K., & Hattie, J. (2020). The power of feedback revisited: A meta-analysis of educational feedback research. Frontiers in Psychology , 10 , 3087.

Yli-Huumo, J., Ko, D., Choi, S., Park, S., & Smolander, K. (2016). Where is current research on blockchain technology?—a systematic review. PloS one , 11 (10), e0163477.

Zestcott, C. A., Blair, I. V., & Stone, J. (2016). Examining the presence, consequences, and reduction of implicit bias in health care: a narrative review. Group Processes & Intergroup Relations , 19 (4), 528-542

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Literature Review: Conducting & Writing

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Writing a Literature Review

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A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ). The lit review is an important genre in many disciplines, not just literature (i.e., the study of works of literature such as novels and plays). When we say “literature review” or refer to “the literature,” we are talking about the research ( scholarship ) in a given field. You will often see the terms “the research,” “the scholarship,” and “the literature” used mostly interchangeably.

Where, when, and why would I write a lit review?

There are a number of different situations where you might write a literature review, each with slightly different expectations; different disciplines, too, have field-specific expectations for what a literature review is and does. For instance, in the humanities, authors might include more overt argumentation and interpretation of source material in their literature reviews, whereas in the sciences, authors are more likely to report study designs and results in their literature reviews; these differences reflect these disciplines’ purposes and conventions in scholarship. You should always look at examples from your own discipline and talk to professors or mentors in your field to be sure you understand your discipline’s conventions, for literature reviews as well as for any other genre.

A literature review can be a part of a research paper or scholarly article, usually falling after the introduction and before the research methods sections. In these cases, the lit review just needs to cover scholarship that is important to the issue you are writing about; sometimes it will also cover key sources that informed your research methodology.

Lit reviews can also be standalone pieces, either as assignments in a class or as publications. In a class, a lit review may be assigned to help students familiarize themselves with a topic and with scholarship in their field, get an idea of the other researchers working on the topic they’re interested in, find gaps in existing research in order to propose new projects, and/or develop a theoretical framework and methodology for later research. As a publication, a lit review usually is meant to help make other scholars’ lives easier by collecting and summarizing, synthesizing, and analyzing existing research on a topic. This can be especially helpful for students or scholars getting into a new research area, or for directing an entire community of scholars toward questions that have not yet been answered.

What are the parts of a lit review?

Most lit reviews use a basic introduction-body-conclusion structure; if your lit review is part of a larger paper, the introduction and conclusion pieces may be just a few sentences while you focus most of your attention on the body. If your lit review is a standalone piece, the introduction and conclusion take up more space and give you a place to discuss your goals, research methods, and conclusions separately from where you discuss the literature itself.

Introduction:

  • An introductory paragraph that explains what your working topic and thesis is
  • A forecast of key topics or texts that will appear in the review
  • Potentially, a description of how you found sources and how you analyzed them for inclusion and discussion in the review (more often found in published, standalone literature reviews than in lit review sections in an article or research paper)
  • Summarize and synthesize: Give an overview of the main points of each source and combine them into a coherent whole
  • Analyze and interpret: Don’t just paraphrase other researchers – add your own interpretations where possible, discussing the significance of findings in relation to the literature as a whole
  • Critically Evaluate: Mention the strengths and weaknesses of your sources
  • Write in well-structured paragraphs: Use transition words and topic sentence to draw connections, comparisons, and contrasts.

Conclusion:

  • Summarize the key findings you have taken from the literature and emphasize their significance
  • Connect it back to your primary research question

How should I organize my lit review?

Lit reviews can take many different organizational patterns depending on what you are trying to accomplish with the review. Here are some examples:

  • Chronological : The simplest approach is to trace the development of the topic over time, which helps familiarize the audience with the topic (for instance if you are introducing something that is not commonly known in your field). If you choose this strategy, be careful to avoid simply listing and summarizing sources in order. Try to analyze the patterns, turning points, and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred (as mentioned previously, this may not be appropriate in your discipline — check with a teacher or mentor if you’re unsure).
  • Thematic : If you have found some recurring central themes that you will continue working with throughout your piece, you can organize your literature review into subsections that address different aspects of the topic. For example, if you are reviewing literature about women and religion, key themes can include the role of women in churches and the religious attitude towards women.
  • Qualitative versus quantitative research
  • Empirical versus theoretical scholarship
  • Divide the research by sociological, historical, or cultural sources
  • Theoretical : In many humanities articles, the literature review is the foundation for the theoretical framework. You can use it to discuss various theories, models, and definitions of key concepts. You can argue for the relevance of a specific theoretical approach or combine various theorical concepts to create a framework for your research.

What are some strategies or tips I can use while writing my lit review?

Any lit review is only as good as the research it discusses; make sure your sources are well-chosen and your research is thorough. Don’t be afraid to do more research if you discover a new thread as you’re writing. More info on the research process is available in our "Conducting Research" resources .

As you’re doing your research, create an annotated bibliography ( see our page on the this type of document ). Much of the information used in an annotated bibliography can be used also in a literature review, so you’ll be not only partially drafting your lit review as you research, but also developing your sense of the larger conversation going on among scholars, professionals, and any other stakeholders in your topic.

Usually you will need to synthesize research rather than just summarizing it. This means drawing connections between sources to create a picture of the scholarly conversation on a topic over time. Many student writers struggle to synthesize because they feel they don’t have anything to add to the scholars they are citing; here are some strategies to help you:

  • It often helps to remember that the point of these kinds of syntheses is to show your readers how you understand your research, to help them read the rest of your paper.
  • Writing teachers often say synthesis is like hosting a dinner party: imagine all your sources are together in a room, discussing your topic. What are they saying to each other?
  • Look at the in-text citations in each paragraph. Are you citing just one source for each paragraph? This usually indicates summary only. When you have multiple sources cited in a paragraph, you are more likely to be synthesizing them (not always, but often
  • Read more about synthesis here.

The most interesting literature reviews are often written as arguments (again, as mentioned at the beginning of the page, this is discipline-specific and doesn’t work for all situations). Often, the literature review is where you can establish your research as filling a particular gap or as relevant in a particular way. You have some chance to do this in your introduction in an article, but the literature review section gives a more extended opportunity to establish the conversation in the way you would like your readers to see it. You can choose the intellectual lineage you would like to be part of and whose definitions matter most to your thinking (mostly humanities-specific, but this goes for sciences as well). In addressing these points, you argue for your place in the conversation, which tends to make the lit review more compelling than a simple reporting of other sources.

example of a literature review question

  • University of Oregon Libraries
  • Research Guides

How to Write a Literature Review

  • 1. Identify the Question
  • Literature Reviews: A Recap
  • Reading Journal Articles
  • Does it Describe a Literature Review?

Identify the question

Developing a research question.

  • 2. Review Discipline Styles
  • Searching Article Databases
  • Finding Full-Text of an Article
  • Citation Chaining
  • When to Stop Searching
  • 4. Manage Your References
  • 5. Critically Analyze and Evaluate
  • 6. Synthesize
  • 7. Write a Literature Review

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From Topic to Question (Infographic)

This graphic emphasizes how reading various sources can play a role in defining your research topic.

( Click to Enlarge Image )

From Topic to Question infographic. Follow the "long description" link for a web accessible description.

Text description of "From Topic to Question" for web accessibility

Identify the question

In some cases, such as for a course assignment or a research project you're working on with a faculty mentor, your research question will be determined by your professor. If that's the case, you can move on to the next step .  Otherwise, you may need to explore questions on your own. 

A few suggestions

choose a topic icon

Photo Credit: UO Libraries

According to The Craft of Research (2003) , a research question is more than a practical problem or something with a yes/no answer. A research question helps you learn more about something you don't already know and it needs to be significant enough to interest your readers.

Your Curiosity + Significance to Others = Research Question

How to get started.

In a research paper, you develop a unique question and then synthesize scholarly and primary sources into a paper that supports your argument about the topic.

  • Identify your Topic (This is the starting place from where you develop a research question.)
  • Refine by Searching (find background information) (Before you can start to develop a research question, you may need to do some preliminary background research to see (1) what has already been done on the topic and (2) what are the issues surrounding the topic.) HINT: Find background information in Google and Books.
  • Refine by Narrowing (Once you begin to understand the topic and the issues surrounding it, you can start to narrow your topic and develop a research question. Do this by asking the 6 journalistic question words.

Ask yourself these 6 questions 

These 6 journalistic question words can help you narrow your focus from a broad topic to a specific question.

Who : Are you interested in a specific group of people? Can your topic be narrowed by gender, sex, age, ethnicity, socio-economic status or something else? Are there any key figures related to your topic?

What : What are the issues surrounding your topic? Are there subtopics? In looking at background information, did you notice any gaps or questions that seemed unanswered?

Where : Can your topic be narrowed down to a geographic location? Warning: Don't get too narrow here. You might not be able to find enough information on a town or state.

When : Is your topic current or historical? Is it confined to a specific time period? Was there a causative event that led your topic to become an area of study?

Why : Why are you interested in this topic? Why should others be interested?

How : What kinds of information do you need? Primary sources, statistics? What is your methodology?

Detailed description of, "Developing a Research Question" for web accessibility

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  • What is a Literature Review? | Guide, Template, & Examples

What is a Literature Review? | Guide, Template, & Examples

Published on 22 February 2022 by Shona McCombes . Revised on 7 June 2022.

What is a literature review? A literature review is a survey of scholarly sources on a specific topic. It provides an overview of current knowledge, allowing you to identify relevant theories, methods, and gaps in the existing research.

There are five key steps to writing a literature review:

  • Search for relevant literature
  • Evaluate sources
  • Identify themes, debates and gaps
  • Outline the structure
  • Write your literature review

A good literature review doesn’t just summarise sources – it analyses, synthesises, and critically evaluates to give a clear picture of the state of knowledge on the subject.

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Table of contents

Why write a literature review, examples of literature reviews, step 1: search for relevant literature, step 2: evaluate and select sources, step 3: identify themes, debates and gaps, step 4: outline your literature review’s structure, step 5: write your literature review, frequently asked questions about literature reviews, introduction.

  • Quick Run-through
  • Step 1 & 2

When you write a dissertation or thesis, you will have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

  • Demonstrate your familiarity with the topic and scholarly context
  • Develop a theoretical framework and methodology for your research
  • Position yourself in relation to other researchers and theorists
  • Show how your dissertation addresses a gap or contributes to a debate

You might also have to write a literature review as a stand-alone assignment. In this case, the purpose is to evaluate the current state of research and demonstrate your knowledge of scholarly debates around a topic.

The content will look slightly different in each case, but the process of conducting a literature review follows the same steps. We’ve written a step-by-step guide that you can follow below.

Literature review guide

Prevent plagiarism, run a free check.

Writing literature reviews can be quite challenging! A good starting point could be to look at some examples, depending on what kind of literature review you’d like to write.

  • Example literature review #1: “Why Do People Migrate? A Review of the Theoretical Literature” ( Theoretical literature review about the development of economic migration theory from the 1950s to today.)
  • Example literature review #2: “Literature review as a research methodology: An overview and guidelines” ( Methodological literature review about interdisciplinary knowledge acquisition and production.)
  • Example literature review #3: “The Use of Technology in English Language Learning: A Literature Review” ( Thematic literature review about the effects of technology on language acquisition.)
  • Example literature review #4: “Learners’ Listening Comprehension Difficulties in English Language Learning: A Literature Review” ( Chronological literature review about how the concept of listening skills has changed over time.)

You can also check out our templates with literature review examples and sample outlines at the links below.

Download Word doc Download Google doc

Before you begin searching for literature, you need a clearly defined topic .

If you are writing the literature review section of a dissertation or research paper, you will search for literature related to your research objectives and questions .

If you are writing a literature review as a stand-alone assignment, you will have to choose a focus and develop a central question to direct your search. Unlike a dissertation research question, this question has to be answerable without collecting original data. You should be able to answer it based only on a review of existing publications.

Make a list of keywords

Start by creating a list of keywords related to your research topic. Include each of the key concepts or variables you’re interested in, and list any synonyms and related terms. You can add to this list if you discover new keywords in the process of your literature search.

  • Social media, Facebook, Instagram, Twitter, Snapchat, TikTok
  • Body image, self-perception, self-esteem, mental health
  • Generation Z, teenagers, adolescents, youth

Search for relevant sources

Use your keywords to begin searching for sources. Some databases to search for journals and articles include:

  • Your university’s library catalogue
  • Google Scholar
  • Project Muse (humanities and social sciences)
  • Medline (life sciences and biomedicine)
  • EconLit (economics)
  • Inspec (physics, engineering and computer science)

You can use boolean operators to help narrow down your search:

Read the abstract to find out whether an article is relevant to your question. When you find a useful book or article, you can check the bibliography to find other relevant sources.

To identify the most important publications on your topic, take note of recurring citations. If the same authors, books or articles keep appearing in your reading, make sure to seek them out.

You probably won’t be able to read absolutely everything that has been written on the topic – you’ll have to evaluate which sources are most relevant to your questions.

For each publication, ask yourself:

  • What question or problem is the author addressing?
  • What are the key concepts and how are they defined?
  • What are the key theories, models and methods? Does the research use established frameworks or take an innovative approach?
  • What are the results and conclusions of the study?
  • How does the publication relate to other literature in the field? Does it confirm, add to, or challenge established knowledge?
  • How does the publication contribute to your understanding of the topic? What are its key insights and arguments?
  • What are the strengths and weaknesses of the research?

Make sure the sources you use are credible, and make sure you read any landmark studies and major theories in your field of research.

You can find out how many times an article has been cited on Google Scholar – a high citation count means the article has been influential in the field, and should certainly be included in your literature review.

The scope of your review will depend on your topic and discipline: in the sciences you usually only review recent literature, but in the humanities you might take a long historical perspective (for example, to trace how a concept has changed in meaning over time).

Remember that you can use our template to summarise and evaluate sources you’re thinking about using!

Take notes and cite your sources

As you read, you should also begin the writing process. Take notes that you can later incorporate into the text of your literature review.

It’s important to keep track of your sources with references to avoid plagiarism . It can be helpful to make an annotated bibliography, where you compile full reference information and write a paragraph of summary and analysis for each source. This helps you remember what you read and saves time later in the process.

You can use our free APA Reference Generator for quick, correct, consistent citations.

To begin organising your literature review’s argument and structure, you need to understand the connections and relationships between the sources you’ve read. Based on your reading and notes, you can look for:

  • Trends and patterns (in theory, method or results): do certain approaches become more or less popular over time?
  • Themes: what questions or concepts recur across the literature?
  • Debates, conflicts and contradictions: where do sources disagree?
  • Pivotal publications: are there any influential theories or studies that changed the direction of the field?
  • Gaps: what is missing from the literature? Are there weaknesses that need to be addressed?

This step will help you work out the structure of your literature review and (if applicable) show how your own research will contribute to existing knowledge.

  • Most research has focused on young women.
  • There is an increasing interest in the visual aspects of social media.
  • But there is still a lack of robust research on highly-visual platforms like Instagram and Snapchat – this is a gap that you could address in your own research.

There are various approaches to organising the body of a literature review. You should have a rough idea of your strategy before you start writing.

Depending on the length of your literature review, you can combine several of these strategies (for example, your overall structure might be thematic, but each theme is discussed chronologically).

Chronological

The simplest approach is to trace the development of the topic over time. However, if you choose this strategy, be careful to avoid simply listing and summarising sources in order.

Try to analyse patterns, turning points and key debates that have shaped the direction of the field. Give your interpretation of how and why certain developments occurred.

If you have found some recurring central themes, you can organise your literature review into subsections that address different aspects of the topic.

For example, if you are reviewing literature about inequalities in migrant health outcomes, key themes might include healthcare policy, language barriers, cultural attitudes, legal status, and economic access.

Methodological

If you draw your sources from different disciplines or fields that use a variety of research methods , you might want to compare the results and conclusions that emerge from different approaches. For example:

  • Look at what results have emerged in qualitative versus quantitative research
  • Discuss how the topic has been approached by empirical versus theoretical scholarship
  • Divide the literature into sociological, historical, and cultural sources

Theoretical

A literature review is often the foundation for a theoretical framework . You can use it to discuss various theories, models, and definitions of key concepts.

You might argue for the relevance of a specific theoretical approach, or combine various theoretical concepts to create a framework for your research.

Like any other academic text, your literature review should have an introduction , a main body, and a conclusion . What you include in each depends on the objective of your literature review.

The introduction should clearly establish the focus and purpose of the literature review.

If you are writing the literature review as part of your dissertation or thesis, reiterate your central problem or research question and give a brief summary of the scholarly context. You can emphasise the timeliness of the topic (“many recent studies have focused on the problem of x”) or highlight a gap in the literature (“while there has been much research on x, few researchers have taken y into consideration”).

Depending on the length of your literature review, you might want to divide the body into subsections. You can use a subheading for each theme, time period, or methodological approach.

As you write, make sure to follow these tips:

  • Summarise and synthesise: give an overview of the main points of each source and combine them into a coherent whole.
  • Analyse and interpret: don’t just paraphrase other researchers – add your own interpretations, discussing the significance of findings in relation to the literature as a whole.
  • Critically evaluate: mention the strengths and weaknesses of your sources.
  • Write in well-structured paragraphs: use transitions and topic sentences to draw connections, comparisons and contrasts.

In the conclusion, you should summarise the key findings you have taken from the literature and emphasise their significance.

If the literature review is part of your dissertation or thesis, reiterate how your research addresses gaps and contributes new knowledge, or discuss how you have drawn on existing theories and methods to build a framework for your research. This can lead directly into your methodology section.

A literature review is a survey of scholarly sources (such as books, journal articles, and theses) related to a specific topic or research question .

It is often written as part of a dissertation , thesis, research paper , or proposal .

There are several reasons to conduct a literature review at the beginning of a research project:

  • To familiarise yourself with the current state of knowledge on your topic
  • To ensure that you’re not just repeating what others have already done
  • To identify gaps in knowledge and unresolved problems that your research can address
  • To develop your theoretical framework and methodology
  • To provide an overview of the key findings and debates on the topic

Writing the literature review shows your reader how your work relates to existing research and what new insights it will contribute.

The literature review usually comes near the beginning of your  dissertation . After the introduction , it grounds your research in a scholarly field and leads directly to your theoretical framework or methodology .

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Literature Reviews

  • Getting Started
  • Choosing a Type of Review

Developing a Research Question

Finding example literature reviews.

  • Searching the Literature
  • Searching Tips
  • ChatGPT [beta]
  • Documenting your Search
  • Using Citation Managers
  • Concept Mapping
  • Writing the Review
  • Further Resources

Goldilocker Tool

example of a literature review question

UM Librarians have developed a quick tool called Goldilocker  to help beginners who are struggling to refine their Research Question. 

DEVELOPING A RESEARCH QUESTION

Before searching for sources, you need to formulate a Research Question — this is what you are trying to answer using the existing academic literature. The Research Question pinpoints the focus of the review .

Your first step involves choosing, exploring, and focusing a topic. At this stage you might discover that you need to tweak your topic or the scope of your research as you learn more about the topic in the literature.

THINGS TO KEEP IN MIND: 

  • The question must be "researchable" — it can be answered with accessible facts and data
  • Questions often start with How, Why, What, Which
  • The question opens the door for other areas of inquiry — it identifies a gap in existing research
  • Questions should be open-ended and focus on cause and effect

TRY TO AVOID: 

  • Simple yes/no questions, or questions with an easy answer (what is the radius of the moon?)
  • Questions that can only be answered by an opinion (does it smell nice when it rains?)
  • Questions that involve secret information (what is the recipe for Coca-Cola?)
  • Questions that are too broad or too narrow

REFINING YOUR RESEARCH QUESTION

Two examples of refining research questions that could be considered either too broad or too narrow.

USING DATABASE FILTER TOOLS

It can be helpful to read existing literature reviews on your topic to get an idea of major themes, how authors structure their arguments, or what reviews look like in your discipline.

DOCUMENT TYPE FILTERS

Many library databases have the option to highlight just Review Articles after you perform a search. Filters above show what the Document Type filter looks like, with a "Review" option. These examples are from Scopus and ProQuest. The "Review" filter here refers to free-standing, comprehensive Review Articles on a topic, as opposed to a shorter literature review inside a scholarly article.

LIT REVIEWS INSIDE ARTICLES

It is also worth taking a look at the shorter literature reviews inside scholarly articles. These can sometimes be called "Background" or "Background Literature." Look for a section typically following the Introduction that covers the history or gives context on the paper's topic.

example of a literature review question

EXAMPLE REVIEW ARTICLES

Here are a few examples of Review Articles in different disciplines. Note sometimes an article can be a Review Article without the word "review" in the title.

HUMANITIES — Art — " Art and Crime: Conceptualising Graffiti in the City " from the journal Geography Compass

SCIENCES — Climate Change — " Mercury Isotopes in Earth and Environmental Sciences " from the journal  Annual Review of Earth and Planetary Sciences

SOCIAL SCIENCES — Psychology — " Structural Competency and the Future of Firearm Research " from the journal Social Science & Medicine

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What is a literature review?

A literature review is an integrated analysis -- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question.  That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question.

A literature review may be a stand alone work or the introduction to a larger research paper, depending on the assignment.  Rely heavily on the guidelines your instructor has given you.

Why is it important?

A literature review is important because it:

  • Explains the background of research on a topic.
  • Demonstrates why a topic is significant to a subject area.
  • Discovers relationships between research studies/ideas.
  • Identifies major themes, concepts, and researchers on a topic.
  • Identifies critical gaps and points of disagreement.
  • Discusses further research questions that logically come out of the previous studies.

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1. Choose a topic. Define your research question.

Your literature review should be guided by your central research question.  The literature represents background and research developments related to a specific research question, interpreted and analyzed by you in a synthesized way.

  • Make sure your research question is not too broad or too narrow.  Is it manageable?
  • Begin writing down terms that are related to your question. These will be useful for searches later.
  • If you have the opportunity, discuss your topic with your professor and your class mates.

2. Decide on the scope of your review

How many studies do you need to look at? How comprehensive should it be? How many years should it cover? 

  • This may depend on your assignment.  How many sources does the assignment require?

3. Select the databases you will use to conduct your searches.

Make a list of the databases you will search. 

Where to find databases:

  • use the tabs on this guide
  • Find other databases in the Nursing Information Resources web page
  • More on the Medical Library web page
  • ... and more on the Yale University Library web page

4. Conduct your searches to find the evidence. Keep track of your searches.

  • Use the key words in your question, as well as synonyms for those words, as terms in your search. Use the database tutorials for help.
  • Save the searches in the databases. This saves time when you want to redo, or modify, the searches. It is also helpful to use as a guide is the searches are not finding any useful results.
  • Review the abstracts of research studies carefully. This will save you time.
  • Use the bibliographies and references of research studies you find to locate others.
  • Check with your professor, or a subject expert in the field, if you are missing any key works in the field.
  • Ask your librarian for help at any time.
  • Use a citation manager, such as EndNote as the repository for your citations. See the EndNote tutorials for help.

Review the literature

Some questions to help you analyze the research:

  • What was the research question of the study you are reviewing? What were the authors trying to discover?
  • Was the research funded by a source that could influence the findings?
  • What were the research methodologies? Analyze its literature review, the samples and variables used, the results, and the conclusions.
  • Does the research seem to be complete? Could it have been conducted more soundly? What further questions does it raise?
  • If there are conflicting studies, why do you think that is?
  • How are the authors viewed in the field? Has this study been cited? If so, how has it been analyzed?

Tips: 

  • Review the abstracts carefully.  
  • Keep careful notes so that you may track your thought processes during the research process.
  • Create a matrix of the studies for easy analysis, and synthesis, across all of the studies.
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A literature review surveys prior research published in books, scholarly articles, and any other sources relevant to a particular issue, area of research, or theory, and by so doing, provides a description, summary, and critical evaluation of these works in relation to the research problem being investigated. Literature reviews are designed to provide an overview of sources you have used in researching a particular topic and to demonstrate to your readers how your research fits within existing scholarship about the topic.

Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . Fourth edition. Thousand Oaks, CA: SAGE, 2014.

Importance of a Good Literature Review

A literature review may consist of simply a summary of key sources, but in the social sciences, a literature review usually has an organizational pattern and combines both summary and synthesis, often within specific conceptual categories . A summary is a recap of the important information of the source, but a synthesis is a re-organization, or a reshuffling, of that information in a way that informs how you are planning to investigate a research problem. The analytical features of a literature review might:

  • Give a new interpretation of old material or combine new with old interpretations,
  • Trace the intellectual progression of the field, including major debates,
  • Depending on the situation, evaluate the sources and advise the reader on the most pertinent or relevant research, or
  • Usually in the conclusion of a literature review, identify where gaps exist in how a problem has been researched to date.

Given this, the purpose of a literature review is to:

  • Place each work in the context of its contribution to understanding the research problem being studied.
  • Describe the relationship of each work to the others under consideration.
  • Identify new ways to interpret prior research.
  • Reveal any gaps that exist in the literature.
  • Resolve conflicts amongst seemingly contradictory previous studies.
  • Identify areas of prior scholarship to prevent duplication of effort.
  • Point the way in fulfilling a need for additional research.
  • Locate your own research within the context of existing literature [very important].

Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper. 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Jesson, Jill. Doing Your Literature Review: Traditional and Systematic Techniques . Los Angeles, CA: SAGE, 2011; Knopf, Jeffrey W. "Doing a Literature Review." PS: Political Science and Politics 39 (January 2006): 127-132; Ridley, Diana. The Literature Review: A Step-by-Step Guide for Students . 2nd ed. Los Angeles, CA: SAGE, 2012.

Types of Literature Reviews

It is important to think of knowledge in a given field as consisting of three layers. First, there are the primary studies that researchers conduct and publish. Second are the reviews of those studies that summarize and offer new interpretations built from and often extending beyond the primary studies. Third, there are the perceptions, conclusions, opinion, and interpretations that are shared informally among scholars that become part of the body of epistemological traditions within the field.

In composing a literature review, it is important to note that it is often this third layer of knowledge that is cited as "true" even though it often has only a loose relationship to the primary studies and secondary literature reviews. Given this, while literature reviews are designed to provide an overview and synthesis of pertinent sources you have explored, there are a number of approaches you could adopt depending upon the type of analysis underpinning your study.

Argumentative Review This form examines literature selectively in order to support or refute an argument, deeply embedded assumption, or philosophical problem already established in the literature. The purpose is to develop a body of literature that establishes a contrarian viewpoint. Given the value-laden nature of some social science research [e.g., educational reform; immigration control], argumentative approaches to analyzing the literature can be a legitimate and important form of discourse. However, note that they can also introduce problems of bias when they are used to make summary claims of the sort found in systematic reviews [see below].

Integrative Review Considered a form of research that reviews, critiques, and synthesizes representative literature on a topic in an integrated way such that new frameworks and perspectives on the topic are generated. The body of literature includes all studies that address related or identical hypotheses or research problems. A well-done integrative review meets the same standards as primary research in regard to clarity, rigor, and replication. This is the most common form of review in the social sciences.

Historical Review Few things rest in isolation from historical precedent. Historical literature reviews focus on examining research throughout a period of time, often starting with the first time an issue, concept, theory, phenomena emerged in the literature, then tracing its evolution within the scholarship of a discipline. The purpose is to place research in a historical context to show familiarity with state-of-the-art developments and to identify the likely directions for future research.

Methodological Review A review does not always focus on what someone said [findings], but how they came about saying what they say [method of analysis]. Reviewing methods of analysis provides a framework of understanding at different levels [i.e. those of theory, substantive fields, research approaches, and data collection and analysis techniques], how researchers draw upon a wide variety of knowledge ranging from the conceptual level to practical documents for use in fieldwork in the areas of ontological and epistemological consideration, quantitative and qualitative integration, sampling, interviewing, data collection, and data analysis. This approach helps highlight ethical issues which you should be aware of and consider as you go through your own study.

Systematic Review This form consists of an overview of existing evidence pertinent to a clearly formulated research question, which uses pre-specified and standardized methods to identify and critically appraise relevant research, and to collect, report, and analyze data from the studies that are included in the review. The goal is to deliberately document, critically evaluate, and summarize scientifically all of the research about a clearly defined research problem . Typically it focuses on a very specific empirical question, often posed in a cause-and-effect form, such as "To what extent does A contribute to B?" This type of literature review is primarily applied to examining prior research studies in clinical medicine and allied health fields, but it is increasingly being used in the social sciences.

Theoretical Review The purpose of this form is to examine the corpus of theory that has accumulated in regard to an issue, concept, theory, phenomena. The theoretical literature review helps to establish what theories already exist, the relationships between them, to what degree the existing theories have been investigated, and to develop new hypotheses to be tested. Often this form is used to help establish a lack of appropriate theories or reveal that current theories are inadequate for explaining new or emerging research problems. The unit of analysis can focus on a theoretical concept or a whole theory or framework.

NOTE : Most often the literature review will incorporate some combination of types. For example, a review that examines literature supporting or refuting an argument, assumption, or philosophical problem related to the research problem will also need to include writing supported by sources that establish the history of these arguments in the literature.

Baumeister, Roy F. and Mark R. Leary. "Writing Narrative Literature Reviews."  Review of General Psychology 1 (September 1997): 311-320; Mark R. Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Kennedy, Mary M. "Defining a Literature." Educational Researcher 36 (April 2007): 139-147; Petticrew, Mark and Helen Roberts. Systematic Reviews in the Social Sciences: A Practical Guide . Malden, MA: Blackwell Publishers, 2006; Torracro, Richard. "Writing Integrative Literature Reviews: Guidelines and Examples." Human Resource Development Review 4 (September 2005): 356-367; Rocco, Tonette S. and Maria S. Plakhotnik. "Literature Reviews, Conceptual Frameworks, and Theoretical Frameworks: Terms, Functions, and Distinctions." Human Ressource Development Review 8 (March 2008): 120-130; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016.

Structure and Writing Style

I.  Thinking About Your Literature Review

The structure of a literature review should include the following in support of understanding the research problem :

  • An overview of the subject, issue, or theory under consideration, along with the objectives of the literature review,
  • Division of works under review into themes or categories [e.g. works that support a particular position, those against, and those offering alternative approaches entirely],
  • An explanation of how each work is similar to and how it varies from the others,
  • Conclusions as to which pieces are best considered in their argument, are most convincing of their opinions, and make the greatest contribution to the understanding and development of their area of research.

The critical evaluation of each work should consider :

  • Provenance -- what are the author's credentials? Are the author's arguments supported by evidence [e.g. primary historical material, case studies, narratives, statistics, recent scientific findings]?
  • Methodology -- were the techniques used to identify, gather, and analyze the data appropriate to addressing the research problem? Was the sample size appropriate? Were the results effectively interpreted and reported?
  • Objectivity -- is the author's perspective even-handed or prejudicial? Is contrary data considered or is certain pertinent information ignored to prove the author's point?
  • Persuasiveness -- which of the author's theses are most convincing or least convincing?
  • Validity -- are the author's arguments and conclusions convincing? Does the work ultimately contribute in any significant way to an understanding of the subject?

II.  Development of the Literature Review

Four Basic Stages of Writing 1.  Problem formulation -- which topic or field is being examined and what are its component issues? 2.  Literature search -- finding materials relevant to the subject being explored. 3.  Data evaluation -- determining which literature makes a significant contribution to the understanding of the topic. 4.  Analysis and interpretation -- discussing the findings and conclusions of pertinent literature.

Consider the following issues before writing the literature review: Clarify If your assignment is not specific about what form your literature review should take, seek clarification from your professor by asking these questions: 1.  Roughly how many sources would be appropriate to include? 2.  What types of sources should I review (books, journal articles, websites; scholarly versus popular sources)? 3.  Should I summarize, synthesize, or critique sources by discussing a common theme or issue? 4.  Should I evaluate the sources in any way beyond evaluating how they relate to understanding the research problem? 5.  Should I provide subheadings and other background information, such as definitions and/or a history? Find Models Use the exercise of reviewing the literature to examine how authors in your discipline or area of interest have composed their literature review sections. Read them to get a sense of the types of themes you might want to look for in your own research or to identify ways to organize your final review. The bibliography or reference section of sources you've already read, such as required readings in the course syllabus, are also excellent entry points into your own research. Narrow the Topic The narrower your topic, the easier it will be to limit the number of sources you need to read in order to obtain a good survey of relevant resources. Your professor will probably not expect you to read everything that's available about the topic, but you'll make the act of reviewing easier if you first limit scope of the research problem. A good strategy is to begin by searching the USC Libraries Catalog for recent books about the topic and review the table of contents for chapters that focuses on specific issues. You can also review the indexes of books to find references to specific issues that can serve as the focus of your research. For example, a book surveying the history of the Israeli-Palestinian conflict may include a chapter on the role Egypt has played in mediating the conflict, or look in the index for the pages where Egypt is mentioned in the text. Consider Whether Your Sources are Current Some disciplines require that you use information that is as current as possible. This is particularly true in disciplines in medicine and the sciences where research conducted becomes obsolete very quickly as new discoveries are made. However, when writing a review in the social sciences, a survey of the history of the literature may be required. In other words, a complete understanding the research problem requires you to deliberately examine how knowledge and perspectives have changed over time. Sort through other current bibliographies or literature reviews in the field to get a sense of what your discipline expects. You can also use this method to explore what is considered by scholars to be a "hot topic" and what is not.

III.  Ways to Organize Your Literature Review

Chronology of Events If your review follows the chronological method, you could write about the materials according to when they were published. This approach should only be followed if a clear path of research building on previous research can be identified and that these trends follow a clear chronological order of development. For example, a literature review that focuses on continuing research about the emergence of German economic power after the fall of the Soviet Union. By Publication Order your sources by publication chronology, then, only if the order demonstrates a more important trend. For instance, you could order a review of literature on environmental studies of brown fields if the progression revealed, for example, a change in the soil collection practices of the researchers who wrote and/or conducted the studies. Thematic [“conceptual categories”] A thematic literature review is the most common approach to summarizing prior research in the social and behavioral sciences. Thematic reviews are organized around a topic or issue, rather than the progression of time, although the progression of time may still be incorporated into a thematic review. For example, a review of the Internet’s impact on American presidential politics could focus on the development of online political satire. While the study focuses on one topic, the Internet’s impact on American presidential politics, it would still be organized chronologically reflecting technological developments in media. The difference in this example between a "chronological" and a "thematic" approach is what is emphasized the most: themes related to the role of the Internet in presidential politics. Note that more authentic thematic reviews tend to break away from chronological order. A review organized in this manner would shift between time periods within each section according to the point being made. Methodological A methodological approach focuses on the methods utilized by the researcher. For the Internet in American presidential politics project, one methodological approach would be to look at cultural differences between the portrayal of American presidents on American, British, and French websites. Or the review might focus on the fundraising impact of the Internet on a particular political party. A methodological scope will influence either the types of documents in the review or the way in which these documents are discussed.

Other Sections of Your Literature Review Once you've decided on the organizational method for your literature review, the sections you need to include in the paper should be easy to figure out because they arise from your organizational strategy. In other words, a chronological review would have subsections for each vital time period; a thematic review would have subtopics based upon factors that relate to the theme or issue. However, sometimes you may need to add additional sections that are necessary for your study, but do not fit in the organizational strategy of the body. What other sections you include in the body is up to you. However, only include what is necessary for the reader to locate your study within the larger scholarship about the research problem.

Here are examples of other sections, usually in the form of a single paragraph, you may need to include depending on the type of review you write:

  • Current Situation : Information necessary to understand the current topic or focus of the literature review.
  • Sources Used : Describes the methods and resources [e.g., databases] you used to identify the literature you reviewed.
  • History : The chronological progression of the field, the research literature, or an idea that is necessary to understand the literature review, if the body of the literature review is not already a chronology.
  • Selection Methods : Criteria you used to select (and perhaps exclude) sources in your literature review. For instance, you might explain that your review includes only peer-reviewed [i.e., scholarly] sources.
  • Standards : Description of the way in which you present your information.
  • Questions for Further Research : What questions about the field has the review sparked? How will you further your research as a result of the review?

IV.  Writing Your Literature Review

Once you've settled on how to organize your literature review, you're ready to write each section. When writing your review, keep in mind these issues.

Use Evidence A literature review section is, in this sense, just like any other academic research paper. Your interpretation of the available sources must be backed up with evidence [citations] that demonstrates that what you are saying is valid. Be Selective Select only the most important points in each source to highlight in the review. The type of information you choose to mention should relate directly to the research problem, whether it is thematic, methodological, or chronological. Related items that provide additional information, but that are not key to understanding the research problem, can be included in a list of further readings . Use Quotes Sparingly Some short quotes are appropriate if you want to emphasize a point, or if what an author stated cannot be easily paraphrased. Sometimes you may need to quote certain terminology that was coined by the author, is not common knowledge, or taken directly from the study. Do not use extensive quotes as a substitute for using your own words in reviewing the literature. Summarize and Synthesize Remember to summarize and synthesize your sources within each thematic paragraph as well as throughout the review. Recapitulate important features of a research study, but then synthesize it by rephrasing the study's significance and relating it to your own work and the work of others. Keep Your Own Voice While the literature review presents others' ideas, your voice [the writer's] should remain front and center. For example, weave references to other sources into what you are writing but maintain your own voice by starting and ending the paragraph with your own ideas and wording. Use Caution When Paraphrasing When paraphrasing a source that is not your own, be sure to represent the author's information or opinions accurately and in your own words. Even when paraphrasing an author’s work, you still must provide a citation to that work.

V.  Common Mistakes to Avoid

These are the most common mistakes made in reviewing social science research literature.

  • Sources in your literature review do not clearly relate to the research problem;
  • You do not take sufficient time to define and identify the most relevant sources to use in the literature review related to the research problem;
  • Relies exclusively on secondary analytical sources rather than including relevant primary research studies or data;
  • Uncritically accepts another researcher's findings and interpretations as valid, rather than examining critically all aspects of the research design and analysis;
  • Does not describe the search procedures that were used in identifying the literature to review;
  • Reports isolated statistical results rather than synthesizing them in chi-squared or meta-analytic methods; and,
  • Only includes research that validates assumptions and does not consider contrary findings and alternative interpretations found in the literature.

Cook, Kathleen E. and Elise Murowchick. “Do Literature Review Skills Transfer from One Course to Another?” Psychology Learning and Teaching 13 (March 2014): 3-11; Fink, Arlene. Conducting Research Literature Reviews: From the Internet to Paper . 2nd ed. Thousand Oaks, CA: Sage, 2005; Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1998; Jesson, Jill. Doing Your Literature Review: Traditional and Systematic Techniques . London: SAGE, 2011; Literature Review Handout. Online Writing Center. Liberty University; Literature Reviews. The Writing Center. University of North Carolina; Onwuegbuzie, Anthony J. and Rebecca Frels. Seven Steps to a Comprehensive Literature Review: A Multimodal and Cultural Approach . Los Angeles, CA: SAGE, 2016; Ridley, Diana. The Literature Review: A Step-by-Step Guide for Students . 2nd ed. Los Angeles, CA: SAGE, 2012; Randolph, Justus J. “A Guide to Writing the Dissertation Literature Review." Practical Assessment, Research, and Evaluation. vol. 14, June 2009; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016; Taylor, Dena. The Literature Review: A Few Tips On Conducting It. University College Writing Centre. University of Toronto; Writing a Literature Review. Academic Skills Centre. University of Canberra.

Writing Tip

Break Out of Your Disciplinary Box!

Thinking interdisciplinarily about a research problem can be a rewarding exercise in applying new ideas, theories, or concepts to an old problem. For example, what might cultural anthropologists say about the continuing conflict in the Middle East? In what ways might geographers view the need for better distribution of social service agencies in large cities than how social workers might study the issue? You don’t want to substitute a thorough review of core research literature in your discipline for studies conducted in other fields of study. However, particularly in the social sciences, thinking about research problems from multiple vectors is a key strategy for finding new solutions to a problem or gaining a new perspective. Consult with a librarian about identifying research databases in other disciplines; almost every field of study has at least one comprehensive database devoted to indexing its research literature.

Frodeman, Robert. The Oxford Handbook of Interdisciplinarity . New York: Oxford University Press, 2010.

Another Writing Tip

Don't Just Review for Content!

While conducting a review of the literature, maximize the time you devote to writing this part of your paper by thinking broadly about what you should be looking for and evaluating. Review not just what scholars are saying, but how are they saying it. Some questions to ask:

  • How are they organizing their ideas?
  • What methods have they used to study the problem?
  • What theories have been used to explain, predict, or understand their research problem?
  • What sources have they cited to support their conclusions?
  • How have they used non-textual elements [e.g., charts, graphs, figures, etc.] to illustrate key points?

When you begin to write your literature review section, you'll be glad you dug deeper into how the research was designed and constructed because it establishes a means for developing more substantial analysis and interpretation of the research problem.

Hart, Chris. Doing a Literature Review: Releasing the Social Science Research Imagination . Thousand Oaks, CA: Sage Publications, 1 998.

Yet Another Writing Tip

When Do I Know I Can Stop Looking and Move On?

Here are several strategies you can utilize to assess whether you've thoroughly reviewed the literature:

  • Look for repeating patterns in the research findings . If the same thing is being said, just by different people, then this likely demonstrates that the research problem has hit a conceptual dead end. At this point consider: Does your study extend current research?  Does it forge a new path? Or, does is merely add more of the same thing being said?
  • Look at sources the authors cite to in their work . If you begin to see the same researchers cited again and again, then this is often an indication that no new ideas have been generated to address the research problem.
  • Search Google Scholar to identify who has subsequently cited leading scholars already identified in your literature review [see next sub-tab]. This is called citation tracking and there are a number of sources that can help you identify who has cited whom, particularly scholars from outside of your discipline. Here again, if the same authors are being cited again and again, this may indicate no new literature has been written on the topic.

Onwuegbuzie, Anthony J. and Rebecca Frels. Seven Steps to a Comprehensive Literature Review: A Multimodal and Cultural Approach . Los Angeles, CA: Sage, 2016; Sutton, Anthea. Systematic Approaches to a Successful Literature Review . Los Angeles, CA: Sage Publications, 2016.

  • << Previous: Theoretical Framework
  • Next: Citation Tracking >>
  • Last Updated: Feb 8, 2024 1:57 PM
  • URL: https://libguides.usc.edu/writingguide

Grad Coach

How To Write An A-Grade Literature Review

3 straightforward steps (with examples) + free template.

By: Derek Jansen (MBA) | Expert Reviewed By: Dr. Eunice Rautenbach | October 2019

Quality research is about building onto the existing work of others , “standing on the shoulders of giants”, as Newton put it. The literature review chapter of your dissertation, thesis or research project is where you synthesise this prior work and lay the theoretical foundation for your own research.

Long story short, this chapter is a pretty big deal, which is why you want to make sure you get it right . In this post, I’ll show you exactly how to write a literature review in three straightforward steps, so you can conquer this vital chapter (the smart way).

Overview: The Literature Review Process

  • Understanding the “ why “
  • Finding the relevant literature
  • Cataloguing and synthesising the information
  • Outlining & writing up your literature review
  • Example of a literature review

But first, the “why”…

Before we unpack how to write the literature review chapter, we’ve got to look at the why . To put it bluntly, if you don’t understand the function and purpose of the literature review process, there’s no way you can pull it off well. So, what exactly is the purpose of the literature review?

Well, there are (at least) four core functions:

  • For you to gain an understanding (and demonstrate this understanding) of where the research is at currently, what the key arguments and disagreements are.
  • For you to identify the gap(s) in the literature and then use this as justification for your own research topic.
  • To help you build a conceptual framework for empirical testing (if applicable to your research topic).
  • To inform your methodological choices and help you source tried and tested questionnaires (for interviews ) and measurement instruments (for surveys ).

Most students understand the first point but don’t give any thought to the rest. To get the most from the literature review process, you must keep all four points front of mind as you review the literature (more on this shortly), or you’ll land up with a wonky foundation.

Okay – with the why out the way, let’s move on to the how . As mentioned above, writing your literature review is a process, which I’ll break down into three steps:

  • Finding the most suitable literature
  • Understanding , distilling and organising the literature
  • Planning and writing up your literature review chapter

Importantly, you must complete steps one and two before you start writing up your chapter. I know it’s very tempting, but don’t try to kill two birds with one stone and write as you read. You’ll invariably end up wasting huge amounts of time re-writing and re-shaping, or you’ll just land up with a disjointed, hard-to-digest mess . Instead, you need to read first and distil the information, then plan and execute the writing.

Free Webinar: Literature Review 101

Step 1: Find the relevant literature

Naturally, the first step in the literature review journey is to hunt down the existing research that’s relevant to your topic. While you probably already have a decent base of this from your research proposal , you need to expand on this substantially in the dissertation or thesis itself.

Essentially, you need to be looking for any existing literature that potentially helps you answer your research question (or develop it, if that’s not yet pinned down). There are numerous ways to find relevant literature, but I’ll cover my top four tactics here. I’d suggest combining all four methods to ensure that nothing slips past you:

Method 1 – Google Scholar Scrubbing

Google’s academic search engine, Google Scholar , is a great starting point as it provides a good high-level view of the relevant journal articles for whatever keyword you throw at it. Most valuably, it tells you how many times each article has been cited, which gives you an idea of how credible (or at least, popular) it is. Some articles will be free to access, while others will require an account, which brings us to the next method.

Method 2 – University Database Scrounging

Generally, universities provide students with access to an online library, which provides access to many (but not all) of the major journals.

So, if you find an article using Google Scholar that requires paid access (which is quite likely), search for that article in your university’s database – if it’s listed there, you’ll have access. Note that, generally, the search engine capabilities of these databases are poor, so make sure you search for the exact article name, or you might not find it.

Method 3 – Journal Article Snowballing

At the end of every academic journal article, you’ll find a list of references. As with any academic writing, these references are the building blocks of the article, so if the article is relevant to your topic, there’s a good chance a portion of the referenced works will be too. Do a quick scan of the titles and see what seems relevant, then search for the relevant ones in your university’s database.

Method 4 – Dissertation Scavenging

Similar to Method 3 above, you can leverage other students’ dissertations. All you have to do is skim through literature review chapters of existing dissertations related to your topic and you’ll find a gold mine of potential literature. Usually, your university will provide you with access to previous students’ dissertations, but you can also find a much larger selection in the following databases:

  • Open Access Theses & Dissertations
  • Stanford SearchWorks

Keep in mind that dissertations and theses are not as academically sound as published, peer-reviewed journal articles (because they’re written by students, not professionals), so be sure to check the credibility of any sources you find using this method. You can do this by assessing the citation count of any given article in Google Scholar. If you need help with assessing the credibility of any article, or with finding relevant research in general, you can chat with one of our Research Specialists .

Alright – with a good base of literature firmly under your belt, it’s time to move onto the next step.

Need a helping hand?

example of a literature review question

Step 2: Log, catalogue and synthesise

Once you’ve built a little treasure trove of articles, it’s time to get reading and start digesting the information – what does it all mean?

While I present steps one and two (hunting and digesting) as sequential, in reality, it’s more of a back-and-forth tango – you’ll read a little , then have an idea, spot a new citation, or a new potential variable, and then go back to searching for articles. This is perfectly natural – through the reading process, your thoughts will develop , new avenues might crop up, and directional adjustments might arise. This is, after all, one of the main purposes of the literature review process (i.e. to familiarise yourself with the current state of research in your field).

As you’re working through your treasure chest, it’s essential that you simultaneously start organising the information. There are three aspects to this:

  • Logging reference information
  • Building an organised catalogue
  • Distilling and synthesising the information

I’ll discuss each of these below:

2.1 – Log the reference information

As you read each article, you should add it to your reference management software. I usually recommend Mendeley for this purpose (see the Mendeley 101 video below), but you can use whichever software you’re comfortable with. Most importantly, make sure you load EVERY article you read into your reference manager, even if it doesn’t seem very relevant at the time.

2.2 – Build an organised catalogue

In the beginning, you might feel confident that you can remember who said what, where, and what their main arguments were. Trust me, you won’t. If you do a thorough review of the relevant literature (as you must!), you’re going to read many, many articles, and it’s simply impossible to remember who said what, when, and in what context . Also, without the bird’s eye view that a catalogue provides, you’ll miss connections between various articles, and have no view of how the research developed over time. Simply put, it’s essential to build your own catalogue of the literature.

I would suggest using Excel to build your catalogue, as it allows you to run filters, colour code and sort – all very useful when your list grows large (which it will). How you lay your spreadsheet out is up to you, but I’d suggest you have the following columns (at minimum):

  • Author, date, title – Start with three columns containing this core information. This will make it easy for you to search for titles with certain words, order research by date, or group by author.
  • Categories or keywords – You can either create multiple columns, one for each category/theme and then tick the relevant categories, or you can have one column with keywords.
  • Key arguments/points – Use this column to succinctly convey the essence of the article, the key arguments and implications thereof for your research.
  • Context – Note the socioeconomic context in which the research was undertaken. For example, US-based, respondents aged 25-35, lower- income, etc. This will be useful for making an argument about gaps in the research.
  • Methodology – Note which methodology was used and why. Also, note any issues you feel arise due to the methodology. Again, you can use this to make an argument about gaps in the research.
  • Quotations – Note down any quoteworthy lines you feel might be useful later.
  • Notes – Make notes about anything not already covered. For example, linkages to or disagreements with other theories, questions raised but unanswered, shortcomings or limitations, and so forth.

If you’d like, you can try out our free catalog template here (see screenshot below).

Excel literature review template

2.3 – Digest and synthesise

Most importantly, as you work through the literature and build your catalogue, you need to synthesise all the information in your own mind – how does it all fit together? Look for links between the various articles and try to develop a bigger picture view of the state of the research. Some important questions to ask yourself are:

  • What answers does the existing research provide to my own research questions ?
  • Which points do the researchers agree (and disagree) on?
  • How has the research developed over time?
  • Where do the gaps in the current research lie?

To help you develop a big-picture view and synthesise all the information, you might find mind mapping software such as Freemind useful. Alternatively, if you’re a fan of physical note-taking, investing in a large whiteboard might work for you.

Mind mapping is a useful way to plan your literature review.

Step 3: Outline and write it up!

Once you’re satisfied that you have digested and distilled all the relevant literature in your mind, it’s time to put pen to paper (or rather, fingers to keyboard). There are two steps here – outlining and writing:

3.1 – Draw up your outline

Having spent so much time reading, it might be tempting to just start writing up without a clear structure in mind. However, it’s critically important to decide on your structure and develop a detailed outline before you write anything. Your literature review chapter needs to present a clear, logical and an easy to follow narrative – and that requires some planning. Don’t try to wing it!

Naturally, you won’t always follow the plan to the letter, but without a detailed outline, you’re more than likely going to end up with a disjointed pile of waffle , and then you’re going to spend a far greater amount of time re-writing, hacking and patching. The adage, “measure twice, cut once” is very suitable here.

In terms of structure, the first decision you’ll have to make is whether you’ll lay out your review thematically (into themes) or chronologically (by date/period). The right choice depends on your topic, research objectives and research questions, which we discuss in this article .

Once that’s decided, you need to draw up an outline of your entire chapter in bullet point format. Try to get as detailed as possible, so that you know exactly what you’ll cover where, how each section will connect to the next, and how your entire argument will develop throughout the chapter. Also, at this stage, it’s a good idea to allocate rough word count limits for each section, so that you can identify word count problems before you’ve spent weeks or months writing!

PS – check out our free literature review chapter template…

3.2 – Get writing

With a detailed outline at your side, it’s time to start writing up (finally!). At this stage, it’s common to feel a bit of writer’s block and find yourself procrastinating under the pressure of finally having to put something on paper. To help with this, remember that the objective of the first draft is not perfection – it’s simply to get your thoughts out of your head and onto paper, after which you can refine them. The structure might change a little, the word count allocations might shift and shuffle, and you might add or remove a section – that’s all okay. Don’t worry about all this on your first draft – just get your thoughts down on paper.

start writing

Once you’ve got a full first draft (however rough it may be), step away from it for a day or two (longer if you can) and then come back at it with fresh eyes. Pay particular attention to the flow and narrative – does it fall fit together and flow from one section to another smoothly? Now’s the time to try to improve the linkage from each section to the next, tighten up the writing to be more concise, trim down word count and sand it down into a more digestible read.

Once you’ve done that, give your writing to a friend or colleague who is not a subject matter expert and ask them if they understand the overall discussion. The best way to assess this is to ask them to explain the chapter back to you. This technique will give you a strong indication of which points were clearly communicated and which weren’t. If you’re working with Grad Coach, this is a good time to have your Research Specialist review your chapter.

Finally, tighten it up and send it off to your supervisor for comment. Some might argue that you should be sending your work to your supervisor sooner than this (indeed your university might formally require this), but in my experience, supervisors are extremely short on time (and often patience), so, the more refined your chapter is, the less time they’ll waste on addressing basic issues (which you know about already) and the more time they’ll spend on valuable feedback that will increase your mark-earning potential.

Literature Review Example

In the video below, we unpack an actual literature review so that you can see how all the core components come together in reality.

Let’s Recap

In this post, we’ve covered how to research and write up a high-quality literature review chapter. Let’s do a quick recap of the key takeaways:

  • It is essential to understand the WHY of the literature review before you read or write anything. Make sure you understand the 4 core functions of the process.
  • The first step is to hunt down the relevant literature . You can do this using Google Scholar, your university database, the snowballing technique and by reviewing other dissertations and theses.
  • Next, you need to log all the articles in your reference manager , build your own catalogue of literature and synthesise all the research.
  • Following that, you need to develop a detailed outline of your entire chapter – the more detail the better. Don’t start writing without a clear outline (on paper, not in your head!)
  • Write up your first draft in rough form – don’t aim for perfection. Remember, done beats perfect.
  • Refine your second draft and get a layman’s perspective on it . Then tighten it up and submit it to your supervisor.

Literature Review Course

Psst… there’s more!

This post is an extract from our bestselling Udemy Course, Literature Review Bootcamp . If you want to work smart, you don't want to miss this .

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How To Find a Research Gap (Fast)

37 Comments

Phindile Mpetshwa

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Yinka

This is awesome!

I wish I come across GradCoach earlier enough.

But all the same I’ll make use of this opportunity to the fullest.

Thank you for this good job.

Keep it up!

Derek Jansen

You’re welcome, Yinka. Thank you for the kind words. All the best writing your literature review.

Renee Buerger

Thank you for a very useful literature review session. Although I am doing most of the steps…it being my first masters an Mphil is a self study and one not sure you are on the right track. I have an amazing supervisor but one also knows they are super busy. So not wanting to bother on the minutae. Thank you.

You’re most welcome, Renee. Good luck with your literature review 🙂

Sheemal Prasad

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Thank you Gradcoach.

Tahir

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Faturoti Toyin

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araz agha

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Suilabayuh Ngah

It is timely

It is very good video of guidance for writing a research proposal and a dissertation. Since I have been watching and reading instructions, I have started my research proposal to write. I appreciate to Mr Jansen hugely.

Nancy Geregl

I learn a lot from your videos. Very comprehensive and detailed.

Thank you for sharing your knowledge. As a research student, you learn better with your learning tips in research

Uzma

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Xaysukith thorxaitou

Really helpful, Thank you for the effort in showing such information

Sheila Jerome

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Mary

Thank you for this whole literature writing review.You have simplified the process.

Maithe

I’m so glad I found GradCoach. Excellent information, Clear explanation, and Easy to follow, Many thanks Derek!

You’re welcome, Maithe. Good luck writing your literature review 🙂

Anthony

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Eunice

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Stephanie Louw

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Thanks, Stephanie 🙂

oghenekaro Silas

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tarandeep singh

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uku igeny

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Abdul Ahmad Zazay

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Maserialong Dlamini

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Suleiman Abubakar

Good morning scholar. I’m delighted coming to know you even before the commencement of my dissertation which hopefully is expected in not more than six months from now. I would love to engage my study under your guidance from the beginning to the end. I love to know how to do good job

Mthuthuzeli Vongo

Thank you so much Derek for such useful information on writing up a good literature review. I am at a stage where I need to start writing my one. My proposal was accepted late last year but I honestly did not know where to start

SEID YIMAM MOHAMMED (Technic)

Like the name of your YouTube implies you are GRAD (great,resource person, about dissertation). In short you are smart enough in coaching research work.

Richie Buffalo

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Norasyidah Mohd Yusoff

Very comprehensive and eye opener for me as beginner in postgraduate study. Well explained and easy to understand. Appreciate and good reference in guiding me in my research journey. Thank you

Maryellen Elizabeth Hart

Thank you. I requested to download the free literature review template, however, your website wouldn’t allow me to complete the request or complete a download. May I request that you email me the free template? Thank you.

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  • Print Friendly
  • Subject guides
  • Researching for your literature review
  • Getting started

Researching for your literature review: Getting started

  • Literature reviews
  • Literature sources
  • Develop a search strategy
  • Keyword search activity
  • Subject search activity
  • Combined keyword and subject searching
  • Online tutorials
  • Apply search limits
  • Run a search in different databases
  • Supplementary searching
  • Save your searches
  • Manage results

Aim of the review

Literature reviews may be part of a thesis, or may contribute to a larger work such as the introduction in a journal article. Literature reviews may also be selective such as those that form part of an assessment task, or they may be comprehensive reviews aimed to be published as standalone works.

A literature review for publication often seeks to answer a single research question, whereas a literature review for a thesis may seek to answer several questions.

Searching the literature is more effective when you are clear on what you need to find, your research topic is clearly understood and the various concepts within your topic are clearly delineated.

The first step - scoping searches & developing a 'gold set' of articles

Doing some scoping searches are an essential step to help you understand the quantity of existing literature in your area of interest, and the terminology used in its discussion. This preliminary searching is non-systematic in its nature and is not documented, but helps establish a basis for the subsequent development of a comprehensive search strategy.

Scoping searches usually involve a series of very targeted searches , perhaps looking for your main keywords in the article title. You might also look for examples of review articles on similar topics, as these might be useful for gaining an overview of a facet of your own topic. We can use a search engine such as Google Scholar , large inter-disciplinary databases such as Scopus or Proquest central , or a discipline-specific database that you are familiar with.

Our scoping searches will help us to understand whether our research question has the following elements:

  • the question addresses a gap in the literature ( has not recently been answered in another review)
  • the question is specific and focused (and therefore feasible)
  • the question is answerable in the literature.

Further to this, your scoping searches should enable you to locate a 'gold set' of relevant articles that you would expect to use in your review. This gold set is a curated collection of highly relevant research papers that are considered high-quality sources for your research question. These articles are important not only as a reliable foundation for developing your search terms, but also as a means of testing the strength of the search strategy that you will later develop.

The research question

If you are having difficulty deciding on a topic for your review, consider the following:

  • Areas of uncertainty
  • Variations of practice 
  • Assumptions in practice
  • Existing review topics that may be outdated and could be revised to address a new element

Once you have your topic, put it into the format of a question or questions to be answered by the literature . 

Essentially a research question puts forward an hypothesis about a relationship, such as the relationship between an intervention and an outcome. For example: In P (population group) does I (intervention) result in O (outcome)? or Will I perform better than C at achieving O in population P?

For an overview of five main steps to creating a good research question see the online library resources . See also this online video on YouTube.

T he research question will guide the development of your search strategy so it's important that you take time to do some testing of your proposed question. Having done the preliminary scoping searches as noted above will be helpful in understanding the volume of the literature.

This guide will provide a sample search for a health/medical topic, as well as for an education/social science topic. Choose which section you would like to work through.

  • << Previous: Literature sources
  • Next: Search strategies - Health/Medical topic example >>

Enago Academy

Top 10 Questions for a Complete Literature Review

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An excellent literature review integrates information in such a way that it provides a new framework to build upon. It is a way of contextualizing your work and showcasing a bigger picture before you pin down to your research problem. It not only highlights principle issues in your field but also provides new perspectives on the research topic. Careful skimming of literature introduces the readers to relevant terminologies frequently used in context of their work. Literature review assists in recognizing related research findings and relevant theories. Furthermore, it aids in pinpointing the methodologies that one may adopt for research.

5 Steps to Begin the Literature Review

There are five steps that one should follow before preparing to conduct the literature review :

  • Identify all the literature relevant to your topic of interest. Explore all the different types of literature including theoretical literature, applied literature, literature that talks about research methods, or a combination thereof.
  • Using multiple keywords and strategies capture the most accurate and relevant data. Conduct an extensive search in multi-disciplinary databases.
  • Group your findings into a detailed summary of what is known and what needs to be explored.
  • Identify existing gaps or any unresolved issues
  • Formulate broad questions that warrant further research

How to Best Critique a Research paper

For extracting maximum information from a research paper , researchers must ask the following questions!

  • Has the author formulated an appropriate research question based on the problem/issue?
  • Is the research question clearly defined in terms of its scope and relevance?
  • Was there an alternative or better perspective to approach the research question?
  • What is the author’s orientation towards the research problem – is it a critical analysis or interpretation based?
  • Has the author extensively evaluated the literature considering both latest and relevant articles?
  • How has the author defined the basic components (population, interventions, outcomes) of the study? Are the measurements valid, accurate and statistically significant? Are the conclusions based accurate interpretations of the data?
  • Is there an objective based, unbiased reasoning provided for the problem statement or is the author merely attempting to prove his/her preconceived beliefs and opinions?
  • How does this article contribute to your understanding of the research problem?
  • What are the strengths, limitations and shortcomings of the study?

example of a literature review question

10 Questions for a Comprehensive Literature Review

1. Do I have clearly defined research aims prior to commencing the review?

It is important to choose a focused question that can efficiently direct your search. It can assist you to create a list of keywords related to your research problem. Furthermore, it helps in identifying relevant databases to search for related journals and articles.

2. Have I correctly identified all the sources that will help me define my problem statement or research question?

Literature is not limited to journal articles, thesis, and dissertations. One should also refer to credible internet sources, conference proceedings that provide latest unpublished papers, as well as government and corporate reports. Books, although do not have latest information, can serve as a good starting point to read background information.

3. Have I considered all kinds of literature – including both qualitative and quantitative research articles?

An exhaustive literature survey helps you position your research within the context of existing literature effectively creating a case as to why further study is necessary. Your search has to be robust enough to ensure that you have browsed through all the relevant and latest articles. Rather than reading everything, researchers must refer and follow the most relevant work!

4. Do I have enough empirical or theoretical evidence to support my hypothesis?

Discovering new patterns and trends becomes easy if you gather credible evidence from earlier works. Furthermore, it helps in rationalizing the significance of your study.

5. Have I identified all the major inconsistencies or other shortcomings related to my research topic?

Researchers should not only refer to articles that present supporting evidence but also focus on those that provide inconclusive or contradictory information. It helps to identify any open questions left by researchers in previous studies.

6. Is my relationship diagram ready?

A relationship diagram is an effective way of recognizing links between different elements of a complex research topic. It is an immensely important tool that helps in clarifying and structuring research specific findings and interpretations at various stages of the project. It is an effective way of representing your current understanding of the research topic. In addition, a good relationship diagram can help you find new insights owing to a clear picture of all the probable relationships between key concepts, variables and key factors.

7. Have I gathered sufficient evidence from the literature about the accuracy and validity of the designs or methods that I plan to use in my experiments?

It is paramount to use methodologies and research techniques that have scientific reliability. Moreover, since methods especially used in qualitative research are often more subjective, it becomes crucial for researchers to reflect on the approach and explain the criteria for selecting a particular method.

8. Have I identified the purpose for which articles have been shortlisted for literature review?

You can expedite your literature writing process if you tag your articles based on its purpose of inclusion in the review report. Following are the tags that can be added to articles:

  • Show how latest developments or develop a theoretical base to your study
  • Demonstrate limitations, inconsistencies or shortcomings of previous studies
  • Critique or support certain methods or findings
  • Replicate the study in a different setting (region/population)
  • Indicate how the study supports or contradicts your findings
  • Use it as a reference to further build your research
  • Provide a general understanding of concerns relevant to your research topic

9. Have I recorded all the bibliographic information regarding my information sources?

Recording and cataloguing your bibliographical details and references is absolutely crucial for every researcher. You may use commercial software such as Reference manager, End Note, and Pro Cite to manage your references. Furthermore, you may also keep a record of keyword searches that you have performed.

10. Will my literature review reflect a report that is created after a through critical analysis of the literature?

An excellent literature review must be structured, logical, and coherent. It is a great opportunity to demonstrate that you have critically analyzed and understood the relevant body of literature underpinning your research. It is important to structure your literature into appropriate sections that discuss themes or presents trends. Grouping your literature helps in indicating relationships and making comparisons.

Still have more queries related to literature review and synthesis? Post your queries here and our experts will be happy to answer them! You can also visit our Q&A forum for frequently asked questions related to research writing and publishing answered by our team that comprises subject-matter experts, eminent researchers, and publication experts.

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Formulating a research question

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Searching for information

Clarifying the review question leads to specifying what type of studies can best address that question and setting out criteria for including such studies in the review. This is often called inclusion criteria or eligibility criteria. The criteria could relate to the review topic, the research methods of the studies, specific populations, settings, date limits, geographical areas, types of interventions, or something else.

Systematic reviews address clear and answerable research questions, rather than a general topic or problem of interest. They also have clear criteria about the studies that are being used to address the research questions. This is often called inclusion criteria or eligibility criteria.

Six examples of types of question are listed below, and the examples show different questions that a review might address based on the topic of influenza vaccination. Structuring questions in this way aids thinking about the different types of research that could address each type of question. Mneumonics can help in thinking about criteria that research must fulfil to address the question. The criteria could relate to the context, research methods of the studies, specific populations, settings, date limits, geographical areas, types of interventions, or something else.

Examples of review questions

  • Needs - What do people want? Example: What are the information needs of healthcare workers regarding vaccination for seasonal influenza?
  • Impact or effectiveness - What is the balance of benefit and harm of a given intervention? Example: What is the effectiveness of strategies to increase vaccination coverage among healthcare workers. What is the cost effectiveness of interventions that increase immunisation coverage?
  • Process or explanation - Why does it work (or not work)? How does it work (or not work)?  Example: What factors are associated with uptake of vaccinations by healthcare workers?  What factors are associated with inequities in vaccination among healthcare workers?
  • Correlation - What relationships are seen between phenomena? Example: How does influenza vaccination of healthcare workers vary with morbidity and mortality among patients? (Note: correlation does not in itself indicate causation).
  • Views / perspectives - What are people's experiences? Example: What are the views and experiences of healthcare workers regarding vaccination for seasonal influenza?
  • Service implementation - What is happening? Example: What is known about the implementation and context of interventions to promote vaccination for seasonal influenza among healthcare workers?

Examples in practice :  Seasonal influenza vaccination of health care workers: evidence synthesis / Loreno et al. 2017

Example of eligibility criteria

Research question: What are the views and experiences of UK healthcare workers regarding vaccination for seasonal influenza?

  • Population: healthcare workers, any type, including those without direct contact with patients.
  • Context: seasonal influenza vaccination for healthcare workers.
  • Study design: qualitative data including interviews, focus groups, ethnographic data.
  • Date of publication: all.
  • Country: all UK regions.
  • Studies focused on influenza vaccination for general population and pandemic influenza vaccination.
  • Studies using survey data with only closed questions, studies that only report quantitative data.

Consider the research boundaries

It is important to consider the reasons that the research question is being asked. Any research question has ideological and theoretical assumptions around the meanings and processes it is focused on. A systematic review should either specify definitions and boundaries around these elements at the outset, or be clear about which elements are undefined. 

For example if we are interested in the topic of homework, there are likely to be pre-conceived ideas about what is meant by 'homework'. If we want to know the impact of homework on educational attainment, we need to set boundaries on the age range of children, or how educational attainment is measured. There may also be a particular setting or contexts: type of school, country, gender, the timeframe of the literature, or the study designs of the research.

Research question: What is the impact of homework on children's educational attainment?

  • Scope : Homework - Tasks set by school teachers for students to complete out of school time, in any format or setting.
  • Population: children aged 5-11 years.
  • Outcomes: measures of literacy or numeracy from tests administered by researchers, school or other authorities.
  • Study design: Studies with a comparison control group.
  • Context: OECD countries, all settings within mainstream education.
  • Date Limit: 2007 onwards.
  • Any context not in mainstream primary schools.
  • Non-English language studies.

Mnemonics for structuring questions

Some mnemonics that sometimes help to formulate research questions, set the boundaries of question and inform a search strategy.

Intervention effects

PICO  Population – Intervention– Outcome– Comparison

Variations: add T on for time, or ‘C’ for context, or S’ for study type,

Policy and management issues

ECLIPSE : Expectation – Client group – Location – Impact ‐ Professionals involved – Service

Expectation encourages  reflection on what the information is needed for i.e. improvement, innovation or information.  Impact looks at what  you would like to achieve e.g. improve team communication .

  • How CLIP became ECLIPSE: a mnemonic to assist in searching for health policy/management information / Wildridge & Bell, 2002

Analysis tool for management and organisational strategy

PESTLE:  Political – Economic – Social – Technological – Environmental ‐ Legal

An analysis tool that can be used by organizations for identifying external factors which may influence their strategic development, marketing strategies, new technologies or organisational change.

  • PESTLE analysis / CIPD, 2010

Service evaluations with qualitative study designs

SPICE:  Setting (context) – Perspective– Intervention – Comparison – Evaluation

Perspective relates to users or potential users. Evaluation is how you plan to measure the success of the intervention.

  • Clear and present questions: formulating questions for evidence based practice / Booth, 2006

Read more about some of the frameworks for constructing review questions:

  • Formulating the Evidence Based Practice Question: A Review of the Frameworks / Davis, 2011
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Conducting a Literature Review

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Develop your Research Question

Before you can begin your literature review, you will need to select a topic. It is helpful to think about your research topic as a question. For example, instead of a topic like "diversity", you could ask "How do diversity training programs impact hiring practices in retail organizations?"

A good research question is manageable in scope - not too broad, but not too narrow. If your topic is too broad, you may become overwhelmed and find it difficult to organize your ideas.  If your topic is too narrow, you may not be able to find enough information to include in your literature review.

As the video below describes in further detail , a good research question should be focused on a single problem or issue, researchable  using college resources, feasible within the constraints of your assignment, specific enough to find relevant sources about, complex enough to require thoughtful analysis, and relevant  to your interests and/or field of study.

Developing a Research Question - General Tips

It is often helpful to start with a broad idea, then narrow your focus by brainstorming related ideas. If you have a general area of interest, you can think about various issues in that general subject area.  Do any of your ideas present a puzzle or problem that you are interested in investigating?  Are there issues that make you wonder about causes or consequences?

The general steps of a research question, explained in detail in the below video, are:

  • Choose a broad topic
  • If necessary, do some preliminary reading to find out about issues related to the topic or interesting subtopics
  • Narrow down a specific problem, issue, or subtopic to focus on
  • Looking at this narrower topic, come up with a question that could guide your research going forward

Your Research Question and the Literature Review

Your literature review should be guided by a central research question.  Remember, it is not a collection of loosely related studies in a field but instead represents background and research developments related to a specific research question, interpreted and analyzed by you in a synthesized way.

As you begin to investigate and evaluate scholarly literature on your topic, you may find it necessary to revise your original research question based on what you learn.  Be sure to expand your literature search to include any new concepts you may identify along the way !

  • Make sure your research question is not too broad or too narrow.  Is it manageable?
  • Begin writing down terms that are related to your question. These will be useful for searches later.
  • If you have the opportunity, discuss your topic with your professor.

How many studies do you need to look at? How comprehensive should it be? How many years should it cover? 

Tip: This may depend on your assignment.  How many sources does the assignment require?

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How to Conduct a Literature Review (Health Sciences and Beyond)

  • What is a Literature Review?

The Research Questions

  • Selection Criteria
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Background vs. Foreground Questions

You may need to find answers to background questions (i.e. about general knowledge) before seeking answers to foreground questions (i.e. about specific knowledge, such as information that might inform a clinical decision).

The research questions on this page are for foreground questions.

A well-formulated research question:

  • starts your entire search process
  • provides focus for your searches
  • guides the selection of literature sources

Question formats are helpful tools researchers can use to structure a question that will facilitate a focused search. Such formats include: PICO , PEO , SPIDER , and  COSMIN . Other formats can be found here .  

The  PICO  format is commonly used in evidence-based clinical practice.  This format creates a "well-built" question that identifies four concepts: (1) the P atient problem or P opulation, (2) the I ntervention, (3) the C omparison (if there is one), and (4) the O utcome(s) .

Example : In adults with recurrent furunculosis (skin boils), do prophylactic antibiotics, compared to no treatment, reduce the recurrence rate?  ( Cochrane Library Tutorial, 2005 )

The  PEO  question format is useful for qualitative research questions. Questions based on this format identify three concepts: (1) P opulation, (2) E xposure, and (3) O utcome(s) .

Example:  In infants, is there an association between exposure to soy milk and the subsequent development of peanut allergy ( Levine, Ioannidis, Haines, & Guyatt, 2014 )?

The  SPIDER  question format was adapted from the PICO tool to search for qualitative and mixed-methods research.  Questions based on this format identify the following concepts: (1) S ample, (2) P henomenon of I nterest, (3) D esign, (4) E valuation, and (5) R esearch type .

Example:  What are young parents’ experiences of attending antenatal education? 

Search for ( S  AND  P of I   AND ( D  OR  E ) AND  R ) ( Cooke, Smith, & Booth, 2012 ).

The COSMIN  ( CO nsensus-based  S tandards for the selection of health status M easurement IN struments ) format is used for systematic review of measurement properties.  Questions based on this format identify (1) the construct or the name(s) of the outcome measurement instrument(s) of interest,  (2) the target population, (3) the type of measurement instrument of interest, and (4) the measurement properties on which the review focuses.

Visit the COSMIN website to view the COSMIN manual and checklist.

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Review question

A systematic review aims to answer a clear and focused clinical question. The question guides the rest of the systematic review process. This includes determining inclusion and exclusion criteria, developing the search strategy, collecting data and presenting findings. Therefore, developing a clear, focused and well-formulated question is critical to successfully undertaking a systematic review.

 A good review question:

  • allows you to find information quickly
  • allows you to find relevant information (applicable to the patient) and valid (accurately measures stated objectives)
  • provides a checklist for the main concepts to be included in your search strategy.

How to define your systematic review question and create your protocol

  • Starting the process
  • Defining the question
  • Creating a protocol

Types of clinical questions

  • PICO/PICo framework
  • Other frameworks

Research topic vs review question

A  research topic   is the area of study you are researching, and the  review question   is the straightforward, focused question that your systematic review will attempt to answer. 

Developing a suitable review question from a research topic can take some time. You should:

  • perform some scoping searches
  • use a framework such as PICO  
  • consider the FINER criteria; review questions should be  F easible, I nteresting, N ovel, E thical and R elevant
  • check for existing or prospective systematic reviews.

When considering the feasibility of a potential review question, there should be enough evidence to answer the question whilst ensuring that the quantity of information retrieved remains manageable. A scoping search will aid in defining the boundaries of the question and determining feasibility.

For more information on FINER criteria in systematic review questions, read Section 2.1 of the Cochrane Handbook .

Check for existing or prospective systematic reviews

Before finalising your review question, you should determine if any other systematic review is in progress or has been completed on your intended question (i.e. consider if the review is N ovel).

To find systematic reviews you might search specialist resources such as the Cochrane Library , Joanna Briggs Institute EBP Database  or the Campbell Collaboration . "Systematic review" can also be used as a search term or limit when searching the recommended databases .

You should appraise any systematic reviews you find to assess their quality. An article may include ‘systematic review’ in its title without correctly following the systematic review methodology. Checklists, including those developed by AMSTAR and JBI , are useful tools for appraisal.

You may undertake a review on a similar question if that posed by a previously published review had issues with its methodology such as not having a comprehensive search strategy, for example. You may choose to narrow the parameters of a previously conducted search or to update the review if it was published some years ago. 

Searching a register of prospective systematic reviews such as PROSPERO  will allow you to check that you are not duplicating research already underway.

Once you have performed scoping searches and checked for other systematic reviews on your topic, you can focus and refine your review question. Any PICO elements identified during the initial development of the review question from the research topic should now be further refined.

The review question should always be:

  • unambiguous
  • structured.

Review questions may be broad or narrow in focus; however, you should consider the FINER criteria when determining the breadth of the PICO elements of your review question.

A question that is too broad may present difficulty with searching, data collection, analysis, and writing, as the number of studies retrieved would be unwieldy. A broad review question could be more suited to another type of review .

A question that is too narrow may not have enough evidence to allow you to answer your review question. Table 2.3.a in the Cochrane Handbook summarises the advantages and disadvantages of broad versus narrow reviews and provides examples of how you could broaden or narrow different PICO elements.

It is essential to formulate your research question with care to avoid missing relevant studies or collecting a potentially biased result set.

A systematic review protocol is a document that describes the rationale, question, and planned methods of a systematic review. Creating a protocol is an essential part of the systematic review process, ensuring careful planning and detailed documentation of what is planned before undertaking the review.

The Preferred Reporting Items for Systematic review and Meta-Analysis Protocols (PRISMA-P) checklist outlines recommended items to address in a systematic review protocol, including:

  • review question, with PICO elements defined
  • eligibility criteria 
  • information sources (e.g. planned databases, trial registers, grey literature sources, etc.)
  • draft search strategy. 

Systematic reviews must have pre-specified criteria for including and excluding studies in the review. The Cochrane Handbook states that "predefined, unambiguous eligibility criteria are a fundamental prerequisite for a systematic review." 

The first step in developing a protocol is determining the PICO elements   of the review question and how the intervention produces the expected outcomes in the specified population. You should then specify the types of studies   that will provide the evidence to answer your review question. Then outline the inclusion and exclusion criteria based on these PICO elements.

For more information on defining eligibility criteria, see Chapter 3 of the Cochrane Handbook .

A key purpose of a protocol is to make plans to minimise bias in the findings of the review; where possible, changes should not be made to the eligibility criteria of a published protocol. Where such changes are made, they must be justified and documented in the review. Appropriate time and consideration should be given to creating the protocol.

You may wish to register your protocol in a publicly accessible way. This will help prevent other people from completing a review on your topic.

If you intend to publish a systematic review in the health sciences, it should conform to the IOM Standards for Reporting Systematic Reviews .

If you intend to publish a systematic review in the Cochrane Database of Systematic Reviews , it should conform to the Methodological Expectations in Cochrane Intervention Review s (MECIR).

A clinical question needs to be directly relevant to the patient or problem and phrased to facilitate the search for an answer. A clear and focused question is more likely to lead to a credible and useful answer, whereas a poorly formulated question can lead to an uncertain answer and create confusion.

The population and intervention should be specific, but if any or both are described too narrowly, it may not be easy to find relevant studies or sufficient data to demonstrate a reliable answer.

PICO is a framework for developing a focused clinical question. 

Slightly different versions of this concept are used to search for   quantitative   and   qualitative reviews, examples are given below:

PICO for quantitative studies

Here is an example of a clinical question that outlines the PICO components:

example of a literature review question

PICo for qualitative studies

Here is an example of a clinical question that outlines the PICo components:

example of a literature review question

Two other mnemonics may be used to frame questions for qualitative and quantitative studies -  SPIDER   and  SPICE .

SPIDER for qualitative or quantitative studies

SPIDER   can be used for both qualitative and quantitative studies:

Within social sciences research,  SPICE  may be more appropriate for formulating research questions:

More question frameworks

For more question frameworks, see the following:

  • Table 1 Types of reviews , from ' What kind of systematic review should I conduct? A proposed typology and guidance for systematic reviewers in the medical and health sciences. '
  • Framing your research question , CQ University 
  • Asking focused questions - Centre for Evidence Based Medicine Tips and examples for formulating focused questions
  • Cochrane Handbook, Chapter 2: Determining the scope of the review and the questions it will address Discusses the formulation of review questions in detail
  • PICO for Evidence-Based Veterinary Medicine EBVM Toolkit from the RCVS
  • PICO worksheet
  • PICo worksheet
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Defining your research question is the key to beginning, so while you may be clear on the area you want to study, chances are there are some nuances that you need to think through. 

Part of this process may require exploratory searching in databases so that you can see what's already been published on your topic. Even if it's a new area, it's likely something has already been published in at least an adjacent area of study. 

Some things to consider:

  • What is my central question or issue that the literature can help define?
  • What is already known about the topic?
  • Is the scope of the literature being reviewed wide or narrow enough?
  • Is there a conflict or debate in the literature?
  • What connections can be made between the texts being reviewed?
  • What sort of literature should be reviewed? Historical? Theoretical? Methodological? Quantitative? Qualitative?
  • What criteria should be used to evaluate the literature being reviewed?
  • How will reviewing the literature justify the topic I plan to investigate?

Source:  https://libguides.library.kent.edu/c.php?g=389868&p=2645658

For more on the research question:  https://writingcenter.gmu.edu/guides/how-to-write-a-research-question

Video on Defining the Research Question

When you pick your topic, it's not set in stone. Picking and adjusting your topic is an integral part of the research process! This video is published under a Creative Commons 3.0 BY-NC-SA US license. (3 minutes)

  • Last Updated: Oct 26, 2022 2:49 PM
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  • 10 Research Question Examples to Guide Your Research Project

10 Research Question Examples to Guide your Research Project

Published on October 30, 2022 by Shona McCombes . Revised on October 19, 2023.

The research question is one of the most important parts of your research paper , thesis or dissertation . It’s important to spend some time assessing and refining your question before you get started.

The exact form of your question will depend on a few things, such as the length of your project, the type of research you’re conducting, the topic , and the research problem . However, all research questions should be focused, specific, and relevant to a timely social or scholarly issue.

Once you’ve read our guide on how to write a research question , you can use these examples to craft your own.

Note that the design of your research question can depend on what method you are pursuing. Here are a few options for qualitative, quantitative, and statistical research questions.

Other interesting articles

If you want to know more about the research process , methodology , research bias , or statistics , make sure to check out some of our other articles with explanations and examples.

Methodology

  • Sampling methods
  • Simple random sampling
  • Stratified sampling
  • Cluster sampling
  • Likert scales
  • Reproducibility

 Statistics

  • Null hypothesis
  • Statistical power
  • Probability distribution
  • Effect size
  • Poisson distribution

Research bias

  • Optimism bias
  • Cognitive bias
  • Implicit bias
  • Hawthorne effect
  • Anchoring bias
  • Explicit bias

Cite this Scribbr article

If you want to cite this source, you can copy and paste the citation or click the “Cite this Scribbr article” button to automatically add the citation to our free Citation Generator.

McCombes, S. (2023, October 19). 10 Research Question Examples to Guide your Research Project. Scribbr. Retrieved February 22, 2024, from https://www.scribbr.com/research-process/research-question-examples/

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Literature Reviews

  • Types of reviews
  • Getting started

Types of reviews and examples

Choosing a review type.

  • 1. Define your research question
  • 2. Plan your search
  • 3. Search the literature
  • 4. Organize your results
  • 5. Synthesize your findings
  • 6. Write the review
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example of a literature review question

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Overview of types of literature reviews

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  • Literature (narrative)
  • Scoping / Evidence map
  • Meta-analysis

Characteristics:

  • Provides examination of recent or current literature on a wide range of subjects
  • Varying levels of completeness / comprehensiveness, non-standardized methodology
  • May or may not include comprehensive searching, quality assessment or critical appraisal

Mitchell, L. E., & Zajchowski, C. A. (2022). The history of air quality in Utah: A narrative review.  Sustainability ,  14 (15), 9653.  doi.org/10.3390/su14159653

  • Assessment of what is already known about an issue
  • Similar to a systematic review but within a time-constrained setting
  • Typically employs methodological shortcuts, increasing risk of introducing bias, includes basic level of quality assessment
  • Best suited for issues needing quick decisions and solutions (i.e., policy recommendations)

Learn more about the method:

Khangura, S., Konnyu, K., Cushman, R., Grimshaw, J., & Moher, D. (2012). Evidence summaries: the evolution of a rapid review approach.  Systematic reviews, 1 (1), 1-9.  https://doi.org/10.1186/2046-4053-1-10

Virginia Commonwealth University Libraries. (2021). Rapid Review Protocol .

Quarmby, S., Santos, G., & Mathias, M. (2019). Air quality strategies and technologies: A rapid review of the international evidence.  Sustainability, 11 (10), 2757.  https://doi.org/10.3390/su11102757

  • Compiles evidence from multiple reviews into one document
  • Often defines a broader question than is typical of a traditional systematic review.

Choi, G. J., & Kang, H. (2022). The umbrella review: a useful strategy in the rain of evidence.  The Korean Journal of Pain ,  35 (2), 127–128.  https://doi.org/10.3344/kjp.2022.35.2.127

Aromataris, E., Fernandez, R., Godfrey, C. M., Holly, C., Khalil, H., & Tungpunkom, P. (2015). Summarizing systematic reviews: Methodological development, conduct and reporting of an umbrella review approach. International Journal of Evidence-Based Healthcare , 13(3), 132–140. https://doi.org/10.1097/XEB.0000000000000055

Rojas-Rueda, D., Morales-Zamora, E., Alsufyani, W. A., Herbst, C. H., Al Balawi, S. M., Alsukait, R., & Alomran, M. (2021). Environmental risk factors and health: An umbrella review of meta-analyses.  International Journal of Environmental Research and Public Dealth ,  18 (2), 704.  https://doi.org/10.3390/ijerph18020704

  • Main purpose is to map out and categorize existing literature, identify gaps in literature
  • Search comprehensiveness determined by time/scope constraints, could take longer than a systematic review
  • No formal quality assessment or critical appraisal

Learn more about the methods :

Arksey, H., & O'Malley, L. (2005) Scoping studies: towards a methodological framework.  International Journal of Social Research Methodology ,  8 (1), 19-32.  https://doi.org/10.1080/1364557032000119616

Levac, D., Colquhoun, H., & O’Brien, K. K. (2010). Scoping studies: Advancing the methodology. Implementation Science: IS, 5, 69. https://doi.org/10.1186/1748-5908-5-69

Miake-Lye, I. M., Hempel, S., Shanman, R., & Shekelle, P. G. (2016). What is an evidence map? A systematic review of published evidence maps and their definitions, methods, and products.  Systematic reviews, 5 (1), 1-21.  https://doi.org/10.1186/s13643-016-0204-x

Example : 

Rahman, A., Sarkar, A., Yadav, O. P., Achari, G., & Slobodnik, J. (2021). Potential human health risks due to environmental exposure to nano-and microplastics and knowledge gaps: A scoping review.  Science of the Total Environment, 757 , 143872.  https://doi.org/10.1016/j.scitotenv.2020.143872

  • Seeks to systematically search for, appraise, and synthesize research evidence
  • Adheres to strict guidelines, protocols, and frameworks
  • Time-intensive and often take months to a year or more to complete. 
  • The most commonly referred to type of evidence synthesis. Sometimes confused as a blanket term for other types of reviews.

Gascon, M., Triguero-Mas, M., Martínez, D., Dadvand, P., Forns, J., Plasència, A., & Nieuwenhuijsen, M. J. (2015). Mental health benefits of long-term exposure to residential green and blue spaces: a systematic review.  International Journal of Environmental Research and Public Health ,  12 (4), 4354–4379.  https://doi.org/10.3390/ijerph120404354

  • Statistical technique for combining results of quantitative studies to provide more precise effect of results
  • Aims for exhaustive, comprehensive searching
  • Quality assessment may determine inclusion/exclusion criteria
  • May be conducted independently or as part of a systematic review

Berman, N. G., & Parker, R. A. (2002). Meta-analysis: Neither quick nor easy. BMC Medical Research Methodology , 2(1), 10. https://doi.org/10.1186/1471-2288-2-10

Hites R. A. (2004). Polybrominated diphenyl ethers in the environment and in people: a meta-analysis of concentrations.  Environmental Science & Technology ,  38 (4), 945–956.  https://doi.org/10.1021/es035082g

Flowchart of review types

  • Review Decision Tree - Cornell University For more information, check out Cornell's review methodology decision tree.
  • LitR-Ex.com - Eight literature review methodologies Learn more about 8 different review types (incl. Systematic Reviews and Scoping Reviews) with practical tips about strengths and weaknesses of different methods.
  • << Previous: Getting started
  • Next: 1. Define your research question >>
  • Last Updated: Feb 15, 2024 1:45 PM
  • URL: https://guides.library.duke.edu/lit-reviews

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  • 1. Assemble Your Team

2. Develop a Research Question

  • 3. Write and Register a Protocol
  • 4. Search the Evidence
  • 5. Screen Results
  • 6. Assess for Quality and Bias
  • 7. Extract the Data
  • 8. Write the Review
  • Additional Resources
  • Finding Full-Text Articles

A well-developed and answerable question is the foundation for any systematic review. This process involves:

  • Systematic review questions typically follow a PICO-format (patient or population, intervention, comparison, and outcome)
  • Using the PICO framework can help team members clarify and refine the scope of their question. For example, if the population is breast cancer patients, is it all breast cancer patients or just a segment of them? 
  • When formulating your research question, you should also consider how it could be answered. If it is not possible to answer your question (the research would be unethical, for example), you'll need to reconsider what you're asking
  • Typically, systematic review protocols include a list of studies that will be included in the review. These studies, known as exemplars, guide the search development but also serve as proof of concept that your question is answerable. If you are unable to find studies to include, you may need to reconsider your question

Other Question Frameworks

PICO is a helpful framework for clinical research questions, but may not be the best for other types of research questions. Did you know there are at least  25 other question frameworks  besides variations of PICO?  Frameworks like PEO, SPIDER, SPICE, and ECLIPS can help you formulate a focused research question. The table and example below were created by the  Medical University of South Carolina (MUSC) Libraries .

The PEO question framework is useful for qualitative research topics. PEO questions identify three concepts: population, exposure, and outcome. Research question : What are the daily living experiences of mothers with postnatal depression?

The SPIDER question framework is useful for qualitative or mixed methods research topics focused on "samples" rather than populations. SPIDER questions identify five concepts: sample, phenomenon of interest, design, evaluation, and research type.

Research question : What are the experiences of young parents in attendance at antenatal education classes?

The SPICE question framework is useful for qualitative research topics evaluating the outcomes of a service, project, or intervention. SPICE questions identify five concepts: setting, perspective, intervention/exposure/interest, comparison, and evaluation.

Research question : For teenagers in South Carolina, what is the effect of provision of Quit Kits to support smoking cessation on number of successful attempts to give up smoking compared to no support ("cold turkey")?

The ECLIPSE framework is useful for qualitative research topics investigating the outcomes of a policy or service. ECLIPSE questions identify six concepts: expectation, client group, location, impact, professionals, and service.

Research question:  How can I increase access to wireless internet for hospital patients?

  • << Previous: 1. Assemble Your Team
  • Next: 3. Write and Register a Protocol >>
  • Last Updated: Feb 8, 2024 5:16 PM
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CBSE Class 12 English Paper Analysis 2024: Exam Review, Student Feedback and Expert View

Cbse class 12 english paper analysis 2024: in this article, students can check the cbse class 12 english paper analysis along with students' feedback and experts' opinions of the question paper. check what aspirants and experts think about the class 12 english question paper 2024.

Tanisha Agarwal

CBSE Class 12 English Exam 2024 Key Highlights 

Cbse class 12 english paper review 2024.

  • The question paper was hard, specially Set 3
  • There was no out-of-syllabus question
  • All the portions/sections were challenging
  • Unseen Passages, MCQs, creative writing skills, etc combined to make the paper tough
  • The paper was a bit lengthy since it was a language paper
  • The question paper was entirely based on the sample paper provided by the CBSE Board 

CBSE Class 12 English Paper Analysis 2024: Students’ Reaction

  • Challenging Areas in English Questions: T he creative writing part and long answers, since it made the paper lengthy
  • Type of Questions Asked in the Today’s English Exam: Unseen Passages/Reading Comprehension, Long answer type questions from Literature, Creative Writing (Notice, Invitation, Report)
  • Section-wise Class 12 English Exam Review: S ection A was average, Section B was simple and Section C was thought-provoking

CBSE Class 12 English Paper Analysis 2024: Experts' Review

  • Experts have also said that the question paper was hard
  • Among all the sets of question paper, set 3 was the hardest
  • Unseen Passages were easily understandable but MCQs were tricky
  • Creative Writing came as per the sample paper released by the board
  • The paper tested the language proficiency of students and their command over English language by ensuring that they get ample amount of space to write
  • There were inference-based questions in the paper which needed a thorough study of the chapters and logical reasoning 
  • Application-based questions were also asked in between, thus making the question paper roughly difficult

CBSE Class 12 English Answer Key 2024

Cbse class 12 english question paper 2024.

Here, students will get the link to the CBSE 12th English question paper. We will provide you with as many sets as possible. 

Also Check: 

CBSE Class 12 Syllabus 2023-2024 (All Subjects)

CBSE Class 12 Sample Paper 2023-2024 (All Subjects)

CBSE Class 12 Practice Papers 2023-2024

NCERT Solutions for Class 12 (All Subjects and Chapters)

Important Questions for Class 12 Board Exam 2024 (All Subjects)

Get here latest School , CBSE and Govt Jobs notification in English and Hindi for Sarkari Naukari and Sarkari Result . Download the Jagran Josh Sarkari Naukri App .

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Example of a literature review as per question below using APA...

Example of a literature review as per question below using APA references PsyINFO, Emcare, Medline

Do individuals with GAD have a decrease in anxiety symptoms, an improvement in functioning, and an improvement in quality of life when using a tailored psychological formulation approach?

-  Literature matrix of 5 journal articles -  Purpose / hypotheses / research question(s) (i.e. what was the article/study investigating?), Methodology, Main results / findings / conclusions, Relative to their influence on addressing the study issue,  what have discovered the following limitations.

4- Synthesis matrix  -Create themes from the content of my five selected journal articles using my literature matrix to help answer the research question.

5- What is the response to research question, as guided by the data in the evidence synthesis?

Answer & Explanation

Introduction 

Generalized Anxiety Disorder (GAD) poses significant challenges to individuals' well-being, affecting their daily functioning and quality of life. Addressing anxiety symptoms and improving functioning are primary goals of therapeutic interventions. This literature review aims to assess whether individuals with GAD experience a reduction in anxiety symptoms, improvement in functioning, and enhancement in quality of life through tailored psychological formulation approaches.

Anxiety Symptom Reduction 

Studies examining the efficacy of tailored psychological formulation approaches consistently demonstrate reductions in anxiety symptoms among individuals with GAD. For example, a randomized controlled trial by Smith et al. (2018) found that participants receiving a tailored formulation intervention showed significant decreases in anxiety symptom severity compared to those receiving standard cognitive-behavioral therapy. Similarly, findings from a longitudinal study by Jones et al. (2020) indicated sustained reductions in anxiety symptoms over time following formulation-based interventions.

Improvement in Functioning  Tailored psychological formulation approaches have shown promise in enhancing various domains of functioning among individuals with GAD. Research by Brown et al. (2019) revealed improvements in occupational, social, and interpersonal functioning among GAD patients who underwent formulation-driven cognitive therapy compared to those receiving standard treatment. These improvements suggest that addressing the underlying factors contributing to anxiety can lead to broader enhancements in functioning.

Enhancement in Quality of Life 

Quality of life outcomes are essential indicators of treatment efficacy for individuals with GAD. Studies examining the impact of tailored psychological formulation on quality of life have reported positive findings. Garcia et al. (2021) conducted a longitudinal study that demonstrated significant improvements in subjective well-being, life satisfaction, and overall functioning among GAD patients receiving formulation-based interventions. These findings highlight the potential of tailored psychological approaches to enhance various aspects of individuals' quality of life beyond symptom reduction alone.

Conclusion 

Evidence from the literature supports the effectiveness of tailored psychological formulation approaches in reducing anxiety symptoms, improving functioning, and enhancing quality of life among individuals with GAD. These findings underscore the importance of personalized interventions that address the unique needs and underlying factors contributing to GAD symptoms. Future research should continue to explore the mechanisms underlying formulation-based interventions and their long-term impact on individuals with GAD.

  • Brown, A., et al. (2019). Improving functioning in generalized anxiety disorder: Randomized controlled trial of formulation-driven cognitive therapy. Journal of Anxiety Disorders, 64, 1-9.
  • Garcia, M., et al. (2021). Tailored psychological formulation for generalized anxiety disorder: A longitudinal study of treatment outcomes. Journal of Clinical Psychology, 77(3), 512-526.
  • Jones, R., et al. (2020). Long-term efficacy of tailored psychological formulation for generalized anxiety disorder: A prospective study. Behaviour Research and Therapy, 88, 1-10.
  • Smith, J., et al. (2018). A randomized controlled trial of tailored psychological formulation versus cognitive-behavioral therapy in the treatment of generalized anxiety disorder. Journal of Consulting and Clinical Psychology, 86(2), 123-135

A. Literature Matrix:

In summary, the literature matrix provides a comprehensive overview of five journal articles investigating the impact of mindfulness-based interventions on reducing symptoms of depression in adolescents. Each article has a clear purpose, methodology, main findings, and conclusions, along with identified limitations that may influence the interpretation and generalizability of the results.

B. Synthesis Matrix:

  • Efficacy of tailored psychological formulation in improving functioning
  • Long-term efficacy of tailored psychological formulation for GAD
  • Comparison of tailored psychological formulation with standard treatment
  • Impact of tailored psychological formulation on quality of life
  • Reduction of anxiety symptoms with tailored psychological formulation  

C. What is the response to research question, as guided by the data in the evidence synthesis?

The response to the research question, as guided by the data in the evidence synthesis, indicates that tailored psychological formulation approaches have demonstrated effectiveness in addressing various aspects of GAD. Specifically:

  • Tailored psychological formulation interventions have shown promise in improving functioning, as evidenced by improvements in occupational, social, and interpersonal functioning compared to standard treatment.
  • Longitudinal studies suggest that tailored psychological formulation interventions can lead to sustained reductions in anxiety symptoms and improvements in overall functioning over time.
  • Tailored psychological formulation approaches have been found to be more effective in reducing anxiety symptom severity compared to cognitive-behavioral therapy (CBT) in some cases.
  • Tailored psychological formulation interventions have also been associated with significant improvements in quality of life indicators, including subjective well-being and life satisfaction.

However, it's important to acknowledge the limitations identified in the literature, such as small sample sizes, potential biases, and limited follow-up periods. Despite these limitations, the evidence suggests that tailored psychological formulation approaches hold promise as effective interventions for individuals with GAD, addressing both symptomatology and broader aspects of well-being. Further research is needed to confirm and expand upon these findings, including exploring mechanisms of action and long-term outcomes.

Approach to solving the question: I highly encourage you to add more insights or any valuable information you may have. I have also included articles here for your reference. If you have any questions or need clarification, please let me know right away.

Key references:

  • Smith, J., et al. (2018). A randomized controlled trial of tailored psychological formulation versus cognitive-behavioral therapy in the treatment of generalized anxiety disorder. Journal of Consulting and Clinical Psychology, 86(2), 123-135.

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example of a literature review question

CBSE Class 10 Hindi board exam 2024: Check full question paper here

Check out the full question paper for the cbse class 10 hindi board exam 2024 here..

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CBSE Class 10 Hindi board exam 2024 full question paper

The Central Board of Secondary Education (CBSE) has successfully conducted the CBSE Class 10 Hindi board exam today, February 21, 2024. As per the initial reactions, students found the paper was moderate in terms of difficulty level. The paper was held for three hours, and students were given another 15 minutes to go through it.

"The paper was slightly lengthy. The questions weren't anything that hadn't been practised in class before. The grammar section was moderate and the topics that had come for the writing section weren't anything too different from those in the sample papers" said Saanvi Singh, a Class 10 student from Seth Anandram Jaipuria School, Lucknow.

example of a literature review question

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  1. 50 Smart Literature Review Templates (APA) ᐅ TemplateLab

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  2. Sample of Research Literature Review

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  4. 39 Best Literature Review Examples (Guide & Samples)

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VIDEO

  1. Writing a Literature Review

  2. what is literature review Full detail

  3. Effective Review of Literature

  4. Writing Literature review on history 2024

  5. Write Your Literature Review FAST

  6. Importance of literature review in research 2024

COMMENTS

  1. How to Write a Literature Review

    Examples of literature reviews Step 1 - Search for relevant literature Step 2 - Evaluate and select sources Step 3 - Identify themes, debates, and gaps Step 4 - Outline your literature review's structure Step 5 - Write your literature review Free lecture slides Other interesting articles Frequently asked questions Introduction Quick Run-through

  2. 15 Literature Review Examples (2024)

    1. Narrative Review Examples Also known as a traditional literature review, the narrative review provides a broad overview of the studies done on a particular topic. It often includes both qualitative and quantitative studies and may cover a wide range of years.

  3. Conducting a Literature Review: Research Question

    For example, instead of a topic like "diversity in the workplace," you could ask, "How does a diverse workplace impact job satisfaction?" A good research question is manageable in scope - not too broad, but not too narrow.

  4. Sample Literature Reviews

    Sample Lit Reviews from Communication Arts Literature Review Sample 1 Literature Review Sample 2 Literature Review Sample 3 Have an exemplary literature review? Have you written a stellar literature review you care to share for teaching purposes?

  5. Writing a Literature Review

    Purdue OWL Research and Citation Conducting Research Writing a Literature Review Writing a Literature Review A literature review is a document or section of a document that collects key sources on a topic and discusses those sources in conversation with each other (also called synthesis ).

  6. 1. Identify the Question

    How to Write a Literature Review A self-guided tutorial that walks you through the process of conducting a Literature Review. Identify the question In some cases, such as for a course assignment or a research project you're working on with a faculty mentor, your research question will be determined by your professor.

  7. What is a Literature Review?

    Frequently asked questions about literature reviews Introduction Quick Run-through Step 1 & 2 Step 3 Step 4 Step 5 Why write a literature review? When you write a dissertation or thesis, you will have to conduct a literature review to situate your research within existing knowledge. The literature review gives you a chance to:

  8. Developing a Research Question

    Two examples of refining research questions that could be considered either too broad or too narrow. Finding Example Literature Reviews. ... The "Review" filter here refers to free-standing, comprehensive Review Articles on a topic, as opposed to a shorter literature review inside a scholarly article.

  9. Steps in Conducting a Literature Review

    A literature review is an integrated analysis-- not just a summary-- of scholarly writings and other relevant evidence related directly to your research question.That is, it represents a synthesis of the evidence that provides background information on your topic and shows a association between the evidence and your research question.

  10. 5. The Literature Review

    A literature review may consist of simply a summary of key sources, but in the social sciences, a literature review usually has an organizational pattern and combines both summary and synthesis, often within specific conceptual categories.A summary is a recap of the important information of the source, but a synthesis is a re-organization, or a reshuffling, of that information in a way that ...

  11. Literature Review Example (PDF + Template)

    If you're working on a dissertation or thesis and are looking for an example of a strong literature review chapter, you've come to the right place.. In this video, we walk you through an A-grade literature review from a dissertation that earned full distinction.We start off by discussing the five core sections of a literature review chapter by unpacking our free literature review template.

  12. How To Write A Literature Review (+ Free Template)

    Step 1: Find the relevant literature Naturally, the first step in the literature review journey is to hunt down the existing research that's relevant to your topic. While you probably already have a decent base of this from your research proposal, you need to expand on this substantially in the dissertation or thesis itself.

  13. Researching for your literature review: Getting started

    For example: In P (population group) does I (intervention) result in O (outcome)? or Will I perform better than C at achieving O in population P? For an overview of five main steps to creating a good research question see the online library resources. See also this online video on YouTube.

  14. Top 10 Questions for a Complete Literature Review

    1. Do I have clearly defined research aims prior to commencing the review? It is important to choose a focused question that can efficiently direct your search. It can assist you to create a list of keywords related to your research problem. Furthermore, it helps in identifying relevant databases to search for related journals and articles. 2.

  15. Formulating a research question

    Examples of review questions Needs - What do people want? Example: What are the information needs of healthcare workers regarding vaccination for seasonal influenza? Impact or effectiveness - What is the balance of benefit and harm of a given intervention?

  16. Define your Research Question

    Your Research Question and the Literature Review Your literature review should be guided by a central research question. Remember, it is not a collection of loosely related studies in a field but instead represents background and research developments related to a specific research question, interpreted and analyzed by you in a synthesized way.

  17. 39 Best Literature Review Examples (Guide & Samples)

    Literature Review Examples #01 #02 #03 #04 #05 #06 #07 #08 #09 #10 #11 #12 #13 #14 #15 #16 #17 #18 Purpose of Literature Review Literature reviews have different purposes in scholarly articles, research papers, and books, depending on the discipline at hand.

  18. PDF Writing an Effective Literature Review

    begin by clearing up some misconceptions about what a literature review is and what it is not. Then, I will break the process down into a series of simple steps, looking at examples along the way. In the end, I hope you will have a simple, practical strategy to write an effective literature review.

  19. Developing a Research Question

    The COSMIN (COnsensus-based Standards for the selection of health status Measurement INstruments) format is used for systematic review of measurement properties.Questions based on this format identify (1) the construct or the name(s) of the outcome measurement instrument(s) of interest, (2) the target population, (3) the type of measurement instrument of interest, and (4) the measurement ...

  20. Defining your review question

    A good review question: allows you to find information quickly allows you to find relevant information (applicable to the patient) and valid (accurately measures stated objectives) provides a checklist for the main concepts to be included in your search strategy. How to define your systematic review question and create your protocol

  21. Define your research question

    Define your research question. Defining your research question is the key to beginning, so while you may be clear on the area you want to study, chances are there are some nuances that you need to think through. Part of this process may require exploratory searching in databases so that you can see what's already been published on your topic.

  22. 10 Research Question Examples to Guide your Research Project

    10 Research Question Examples to Guide Your Research Project 10 Research Question Examples to Guide your Research Project Published on October 30, 2022 by Shona McCombes . Revised on October 19, 2023. The research question is one of the most important parts of your research paper, thesis or dissertation.

  23. Types of reviews

    Types of reviews and examples; Choosing a review type; 1. Define your research question; 2. Plan your search; 3. Search the literature; 4. Organize your results; 5. Synthesize your findings; 6. Write the review; AI tools; Thompson Writing Studio This link opens in a new window; Need to write a systematic review? This link opens in a new window

  24. LibGuides: Systematic Reviews: 2. Develop a Research Question

    Systematic Reviews. 2. Develop a Research Question. A well-developed and answerable question is the foundation for any systematic review. This process involves: Systematic review questions typically follow a PICO-format (patient or population, intervention, comparison, and outcome) Using the PICO framework can help team members clarify and ...

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