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Literature Review: A Self-Guided Tutorial

Using concept maps.

  • Literature Reviews: A Recap
  • Peer Review
  • Reading the Literature
  • Developing Research Questions
  • Considering Strong Opinions
  • 2. Review discipline styles
  • Super Searching
  • Finding the Full Text
  • Citation Searching This link opens in a new window
  • When to stop searching
  • Citation Management
  • Annotating Articles Tip
  • 5. Critically analyze and evaluate
  • How to Review the Literature
  • Using a Synthesis Matrix
  • 7. Write literature review

Concept maps or mind maps visually represent relationships of different concepts. In research, they can help you make connections between ideas. You can use them as you are formulating your research question, as you are reading a complex text, and when you are creating a literature review. See the video and examples below.

How to Create a Concept Map

Credit: Penn State Libraries ( CC-BY ) Run Time: 3:13

  • Bubbl.us Free version allows 3 mind maps, image export, and sharing.
  • MindMeister Free version allows 3 mind maps, sharing, collaborating, and importing. No image-based exporting.

Mind Map of a Text Example

mind map example

Credit: Austin Kleon. A map I drew of John Berger’s Ways of Seeing in 2008. Tumblr post. April 14, 2016. http://tumblr.austinkleon.com/post/142802684061#notes

Literature Review Mind Map Example

This example shows the different aspects of the author's literature review with citations to scholars who have written about those aspects.

literature review concept map

Credit: Clancy Ratliff, Dissertation: Literature Review. Culturecat: Rhetoric and Feminism [blog]. 2 October 2005. http://culturecat.net/node/955 .

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  • Last Updated: Jul 30, 2024 4:12 PM
  • URL: https://libguides.williams.edu/literature-review

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Creating a Comprehensive Literature Review Map: A Step-by-Step Example

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  • Writing Articles & Reviews
  • October 16, 2023

how to create a literature review map

A literature review is an essential component of any academic research paper or thesis. IT involves examining existing literature, scholarly articles, books, and other sources related to your research topic. A literature review map acts as a visual representation of the concepts, studies, and theories that have been covered in the literature. In this article, we will guide you through the process of creating a comprehensive literature review map, step-by-step, to help you structure and organize your literature review effectively.

Step 1: Define Your Research Topic

The first step in creating a literature review map is to clearly define your research topic. Be specific and narrow down your focus to ensure that you have a manageable scope for your literature review. Take into consideration the research objectives or guiding questions that will shape your review.

Step 2: Identify Relevant Keywords

Once you have defined your research topic, identify the keywords and search terms that are most relevant to your study. Brainstorm a list of potential keywords that are commonly used in the literature related to your topic. These keywords will help you locate relevant sources during your literature search.

Step 3: Conduct a Thorough Literature Search

Using databases and search engines specific to your field of study, begin conducting a thorough literature search using the identified keywords. Take note of the key articles, books, and studies that are relevant to your research topic. In this step, IT is important to evaluate the credibility and quality of the sources to ensure that you are referring to reputable and reliable information.

Step 4: Read and Analyze the Literature

After collecting a substantial number of sources, carefully read and analyze each one. Highlight key concepts, methodologies, and findings that are relevant to your research. As you progress, make notes or annotations to help you remember important details and connections between different sources.

Step 5: Organize the Literature

Now that you have read and analyzed the literature, IT ‘s time to organize the information into a coherent structure. One effective way to do this is by using a literature review map. Start by creating categories or themes based on the concepts or theories that emerge from the literature. Group together similar ideas or findings to create a visual representation of the interconnectedness of the sources.

Step 6: Create the Literature Review Map

With your categorized information, you can now create the literature review map. This can be done using software such as Microsoft Word, PowerPoint, or dedicated mind mapping tools. Start with your main research topic in the center and branch out with subcategories based on the themes or concepts identified earlier. Connect relevant sources to each subcategory, illustrating how they contribute to the overall understanding of your research topic.

Step 7: Revise and Refine

Review your literature review map for coherence and completeness. Ensure that all the key sources are accurately placed within the appropriate category or subcategory. Check for any gaps in your coverage and make sure that the map represents a comprehensive overview of the literature on your research topic.

Q: How many sources should I include in my literature review map?

A: The number of sources you include will depend on the requirements of your research and the depth of analysis you aim to achieve. However, IT is generally recommended to thoroughly examine a range of sources, including both seminal texts and recent publications, to ensure a well-rounded and comprehensive literature review.

Q: How do I determine the credibility of the sources for my literature review?

A: Evaluating the credibility of your sources is crucial to ensure that you are basing your review on reputable information. Consider the author’s qualifications, the credibility and reputation of the publishing outlet, the presence of citations within the article, and the overall coherence and consistency of the research findings.

Q: Can I use a literature review map for disciplines outside of the humanities and social sciences?

A: Absolutely! While literature reviews are commonly associated with humanities and social sciences, they are applicable to any academic field. Whether you are conducting research in the sciences, engineering, or any other discipline, a literature review map will help you organize and present the relevant scholarly literature specific to your research topic.

By following these step-by-step guidelines, you can create a comprehensive literature review map that will serve as a valuable tool throughout your research. Remember to regularly update and refine your map as you progress in your studies. A well-organized literature review will not only demonstrate your knowledge and understanding of the field, but also provide a solid foundation for your own research and contribute to the wider scholarly conversation.

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How to Master at Literature Mapping: 5 Most Recommended Tools to Use

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This article is also available in: Turkish , Spanish, Russian , and Portuguese

After putting in a lot of thought, time, and effort, you’ve finally selected a research topic . As the first step towards conducting a successful and impactful research is completed, what follows it is the gruesome process of literature review . Despite the brainstorming, the struggle of understanding how much literature is enough for your research paper or thesis is very much real. Unlike the old days of flipping through pages for hours in a library, literature has come easy to us due to its availability on the internet through Open Access journals and other publishing platforms. This ubiquity has made it even more difficult to cover only significant data! Nevertheless, an ultimate solution to this problem of conglomerating relevant data is literature mapping .

how to create a literature review map

Table of Contents

What is Literature Mapping?

Literature mapping is one of the key strategies when searching literature for your research. Since writing a literature review requires following a systematic method to identify, evaluate, and interpret the work of other researchers, academics, and practitioners from the same research field, creating a literature map proves beneficial. Mapping ideas, arguments, and concepts in a literature is an imperative part of literature review. Additionally, it is stated as an established method for externalizing knowledge and thinking processes. A map of literature is a “graphical plan”, “diagrammatic representation”, or a “geographical metaphor” of the research topic.

Researchers are often overwhelmed by the large amount of information they encounter and have difficulty identifying and organizing information in the context of their research. It is recommended that experts in their fields develop knowledge structures that are richer not only in terms of knowledge, but also in terms of the links between this knowledge. This knowledge linking process is termed as literature mapping .

How Literature Mapping Helps Researchers?

Literature mapping helps researchers in following ways:

  • It provides concrete evidence of a student’s understanding and interpretation of the research field to share with both peers and professors.
  • Switching to another modality helps researchers form patterns to see what might otherwise be hidden in the research area.
  • Furthermore, it helps in identifying gaps in pertinent research.
  • Finally, t lets researchers identify potential original areas of study and parameters of their work.

How to Make a Literature Map?

Literature mapping is not only an organizational tool, but also a reflexive tool. Furthermore, it distinguishes between declarative knowledge shown by identifying key concepts, ideas and methods, and procedural knowledge shown through classifying these key concepts and establishing links or relationships between them. The literature review conceptualizes research structures as a “knowledge production domain” that defines a productive and ongoing constructive element. Thus, the approaches emphasize the identity of different scientific institutions from different fields, which can be mapped theoretically, methodologically, or fundamentally.

The two literature mapping approaches are:

  • Mapping with key ideas or descriptors: This is developed from keywords in research topics.
  • Author mapping: This is also termed as citation matching that identifies key experts in the field and may include the use of citations to interlink them.

Generally, literature maps can be subdivided by categorization processes based on theories, definitions, or chronology, and cross-reference between the two types of mapping. Furthermore, researchers use mind maps as a deductive process, general concept-specific mapping (results in a right triangle), or an inductive process mapping to specific concepts (results in an inverted triangle).

What are Different Literature Mapping Methods?

literature mapping

The different types of literature mapping and representations are as follows:

1. Feature Mapping:

Argument structures developed from summary registration pages.

2. Topic Tree Mapping:

Summary maps showing the development of the topic in sub-themes up to any number of levels.

3. Content Mapping:

Linear structure of organization of content through hierarchical classification.

4. Taxonomic Mapping:

Classification through standardized taxonomies.

5. Concept Mapping:

Linking concepts and processes allows procedural knowledge from declarative information. With a basic principle of cause and effect and problem solving, concept maps can show the relationship between theory and practice.

6. Rhetorical Mapping:

The use of rhetoric communication to discuss, influence, or persuade is particularly important in social policy and political science and can be considered a linking strategy. A number of rhetorical tools have been identified that can be used to present a case, including ethos, metaphor, trope, and irony.

7. Citation Mapping:

Citation mapping or matching is a research process established to specifically establish links between authors by citing their articles. Traditional manual citation indexes have been replaced by automated databases that allow visual mapping methods (e.g. ISI Web of Science). In conclusion, citation matching in a subject area can be effective in determining the frequency of authors and specific articles.

5 Most Useful Literature Mapping Tools

Technology has made the literature mapping process easier now. However, with numerous options available online, it does get difficult for researchers to select one tool that is efficient. These tools are built behind explicit metadata and citations when coupled with some new machine learning techniques. Here are the most recommended literature mapping tools to choose from:

1. Connected Papers

a. Connected Papers is a simple, yet powerful, one-stop visualization tool that uses a single starter article.

b. It is easy to use tool that quickly identifies similar papers with just one “Seed paper” (a relevant paper).

c. Furthermore, it helps to detect seminal papers as well as review papers.

d. It creates a similarity graph not a citation graph and connecting lines (based on the similarity metric).

e. Does not necessarily show direct citation relationships.

f. The identified papers can then be exported into most reference managers like Zotero, EndNote, Mendeley, etc.

2. Inciteful

a. Inciteful is a customizable tool that can be used with multiple starter articles in an iterative process.

b. Results from multiple seed papers can be imported in a batch with a BibTex file.

c. Inciteful produces the following lists of papers by default:

  • Similar papers (uses Adamic/Adar index)
  • “Most Important Papers in the Graph” (based on PageRank)
  • Recent Papers by the Top 100 Authors
  • The Most Important Recent Papers

d. It allows filtration of results by keywords.

e. Importantly, seed papers can also be directly added by title or DOI.

a. Litmaps follows an iterative process and creates visualizations for found papers.

b. It allows importing of papers using BibTex format which can be exported from most reference managers like Zotero, EndNote, Mendeley. In addition, it allows paper imports from an ORCID profile.

c. Keywords search method is used to find Litmaps indexed papers.

d. Additionally, it allows setting up email updates of “emergent literature”.

e. Its unique feature that allows overlay of different maps helps to look for overlaps of papers.

f. Lastly, its explore function allows finding related papers to add to the map.

4. Citation-based Sites

a. CoCites is a citation-based method for researching scientific literature.

b. Citation Gecko is a tool for visualizing links between articles.

c. VOSviewer is a software tool for creating and visualizing bibliometric networks. These networks are for example journals, may include researchers or individual publications, which can be generated based on citation, bibliographic matching , co-citation, or co-authorship relationships. VOSviewer also offers text mining functionality that can be used to create and visualize networks of important terms extracted from a scientific literature.

5. Citation Context Tools

a. Scite allow users to see how a publication has been cited by providing the context of the citation and a classification describing whether it provides supporting or contrasting evidence for the cited claim.

b. Semantic Scholar is a freely available, AI-powered research tool for scientific literature.

Have you ever mapped your literature? Did you use any of these tools before? Lastly, what are the strategies and methods you use for literature mapping ? Let us know how this article helped you in creating a hassle-free and comprehensive literature map.

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How To Use Litmaps To Create A Litmap For Literature Review

Performing a comprehensive literature review can be daunting, but with Litmaps, you can supercharge the process.

Litmaps is an innovative tool that helps researchers discover, organise, and visualise academic papers through interactive literature maps. 

In this post, I will walk you through using Litmaps to enhance your research productivity and streamline your workflow.

how to create a literature review map

What Is Litmaps And How Does It Work?

Litmaps is an essential tool for researchers, offering an interactive way to map out the scientific literature landscape.

You start by entering a topic or a specific paper into the app. Litmaps then creates a litmap, visually showing how articles are connected through citations.

how to create a literature review map

This helps you see the key moments in the research field and understand the relationships between papers.

Using Litmaps, you can find academic papers that you might not discover through traditional searches. It’s particularly useful for students and PhD candidates who need to accelerate their literature review process.

By visualising the connections, you can stay updated on new research and organise your data effectively.

The seed function is a game-changer. You add a single paper, and Litmaps generates a network of related articles, showing who cited whom.

This makes it easier to find relevant literature and understand how different studies are interconnected. You can:

  • tag articles,
  • create collections, and even
  • share your literature maps with colleagues.

Imagine the productivity boost from not having to manually search for new papers! For those looking to make their research process more efficient and comprehensive, Litmaps is the tool to use. 

How To Use Litmaps To Perform Literature Review?

Step 1: get a free account.

To use Litmaps for performing a literature review, start by setting up a free account on their app. Once you’re logged in, the quick search feature becomes your primary tool.

Enter the topic or specific paper you’re interested in, and Litmaps will generate a litmap, a visual representation of the academic literature connected through citations.

Step 2: Find A Key Paper

how to create a literature review map

Begin by finding a key article relevant to your research. If you’re studying the effects of urbanisation on bird migration, you might start with a highly-cited paper like “Bird Migration Advances More Strongly in Urban Environments.”

Enter this into Litmaps’ search bar, and the app will create a litmap with your chosen paper at the centre.

The surrounding nodes represent articles that are either cited by or cite your key paper, helping you see the entire landscape of related research.

Step 3: Expand View To Find Relevant Papers

how to create a literature review map

Use the seed function to expand your view. By adding your key paper, Litmaps will display related articles, showing who cited whom. This helps you discover relevant literature you might otherwise miss.

You may find recent papers published that offers a new perspective on your topic. This feature is especially useful for PhD students or academic researchers who need to cover a vast amount of literature efficiently.

litmap

Step 4: Add Articles & Transcripts

As you explore, you can add articles to your collection. Tagging them based on subtopics or themes as you read along will help you stay organised.

You might tag articles under “urbanisation effects” or “bird migration patterns.” This organisation system is crucial for managing large volumes of information and ensures you can easily find and reference articles later.

Step 5: Monitor Papers, Researchers

Monitoring is another powerful feature. Litmaps can run searches weekly and notify you of new articles related to your topic.

This pro option is a time-saver, ensuring you stay updated without having to manually search for new papers. Imagine the productivity boost from having the latest research delivered to you automatically.

Step 6: Visualise Your Work

Visualising connections between articles helps you understand the broader context of your research. You can see which articles are most influential based on how many times they are cited.

This not only helps you identify key papers but also guides you on what to read next. The interactive nature of Litmaps makes this process engaging and intuitive.

how to create a literature review map

Step 7: Share Your Work

Sharing your findings is simple. You can generate a public URL or share via email, making collaboration with colleagues seamless.

litmap

This is particularly useful when working on a joint project or when you want feedback from peers.

You can also export data in various formats such as:

This feature should be handy for integrating Litmaps into your writing software or reference manager.

Step 8: Keep Track Of Researches & Stay Organised

Using Litmaps also means you can stay organised throughout your literature review.

All articles you add to your litmap are automatically saved, making it easy to track your progress.

You can access your saved articles by clicking “Articles” at the top right, where you can also export your list. Tags further help in categorising your literature, allowing you to create a structured overview of your research.

Litmaps: Organise Research Papers & Create Litmap

Litmaps is more than just a search tool; it’s a comprehensive guide through the entire literature review process.

By leveraging its features, you can accelerate your research, stay organised, and ensure you’re always up-to-date with the latest developments in your field.

Whether you’re a student or a seasoned researcher, Litmaps is designed to enhance your productivity and deepen your understanding of the scientific literature.

If you are looking for a step-by-step process to conduct literature review , feel free to check out my video guide:

how to create a literature review map

Dr Andrew Stapleton has a Masters and PhD in Chemistry from the UK and Australia. He has many years of research experience and has worked as a Postdoctoral Fellow and Associate at a number of Universities. Although having secured funding for his own research, he left academia to help others with his YouTube channel all about the inner workings of academia and how to make it work for you.

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how to create a literature review map

Literature Reviews

  • Getting Started
  • Choosing a Type of Review
  • Developing a Research Question
  • Searching the Literature
  • Searching Tips
  • ChatGPT [beta]
  • Documenting your Search
  • Using Citation Managers
  • Concept Mapping
  • Concept Map Definition

MindMeister

  • Writing the Review
  • Further Resources

Additional Tools

Google slides.

GSlides can create concept maps using their Diagram feature. Insert > Diagram > Hierarchy will give you some editable templates to use.

Tutorial on diagrams in GSlides .

MICROSOFT WORD

MS Word can create concept maps using Insert > SmartArt Graphic. Select Process, Cycle, Hierarchy, or Relationship to see templates.

NVivo  is software for qualitative analysis that has a concept map feature. Zotero libraries can be uploaded using ris files. NVivo Concept Map information.

A concept map or mind map is a visual representation of knowledge that illustrates relationships between concepts or ideas. It is a tool for organizing and representing information in a hierarchical and interconnected manner. At its core, a concept map consists of nodes, which represent individual concepts or ideas, and links, which depict the relationships between these concepts .

Below is a non-exhaustive list of tools that can facilitate the creation of concept maps.

how to create a literature review map

www.canva.com

Canva is a user-friendly graphic design platform that enables individuals to create visual content quickly and easily. It offers a diverse array of customizable templates, design elements, and tools, making it accessible to users with varying levels of design experience. 

Pros: comes with many pre-made concept map templates to get you started

Cons : not all features are available in the free version

Explore Canva concept map templates here .

Note: Although Canva advertises an "education" option, this is for K-12 only and does not apply to university users.

how to create a literature review map

www.lucidchart.com

Lucid has two tools that can create mind maps (what they're called inside Lucid): Lucidchart is the place to build, document, and diagram, and Lucidspark is the place to ideate, connect, and plan.

Lucidchart is a collaborative online diagramming and visualization tool that allows users to create a wide range of diagrams, including flowcharts, org charts, wireframes, and mind maps. Its mind-mapping feature provides a structured framework for brainstorming ideas, organizing thoughts, and visualizing relationships between concepts. 

Lucidspark , works as a virtual whiteboard. Here, you can add sticky notes, develop ideas through freehand drawing, and collaborate with your teammates. Has only one template for mind mapping.

Explore Lucid mind map creation here .

How to create mind maps using LucidSpark:

Note: U-M students have access to Lucid through ITS. [ info here ] Choose the "Login w Google" option, use your @umich.edu account, and access should happen automatically.

how to create a literature review map

www.figma.com

Figma is a cloud-based design tool that enables collaborative interface design and prototyping. It's widely used by UI/UX designers to create, prototype, and iterate on digital designs. Figma is the main design tool, and FigJam is their virtual whiteboard:

Figma  is a comprehensive design tool that enables designers to create and prototype high-fidelity designs

FigJam focuses on collaboration and brainstorming, providing a virtual whiteboard-like experience, best for concept maps

Explore FigJam concept maps here .

how to create a literature review map

Note: There is a " Figma for Education " version for students that will provide access. Choose the "Login w Google" option, use your @umich.edu account, and access should happen automatically.

how to create a literature review map

www.mindmeister.com

MindMeister  is an online mind mapping tool that allows users to visually organize their thoughts, ideas, and information in a structured and hierarchical format. It provides a digital canvas where users can create and manipulate nodes representing concepts or topics, and connect them with lines to show relationships and associations.

Features : collaborative, permits multiple co-authors, and multiple export formats. The free version allows up to 3 mind maps.

Explore  MindMeister templates here .

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  • Next: Writing the Review >>
  • Last Updated: May 9, 2024 11:44 AM
  • URL: https://guides.lib.umich.edu/litreview

Literature Mapping in Scientific Research: A Comprehensive Review

Accelerate scientific research with Literature Mapping: a comprehensive tool for knowledge discovery and data-driven insights.

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Literature mapping is a process that involves analyzing and visualizing the scientific literature on a particular topic to identify research gaps, improve collaboration, and inform decision-making.

In this article, we list five benefits of literature mapping for scientists and researchers and show you types and tools to save your time and help you find better evidence.

What is Literature Mapping?

Literature mapping is a process that involves analyzing and visualizing the scientific literature on a particular topic. It includes systematically searching, collecting, and reviewing relevant studies, articles, and books published in a specific field or discipline.

The purpose of literature mapping is to provide a comprehensive overview of the current state of knowledge on a topic, identify gaps in the literature, and potential areas for future research. It can be useful for those who seek to conduct a systematic review, develop a research proposal, or explore new research areas.

Benefits of Literature Mapping

Here are five benefits of literature mapping for scientists and researchers:

  • Identify research gaps : Literature mapping helps researchers to identify gaps in the existing research and to determine areas that require further investigation.
  • Visualize the research landscape : By creating visualizations of the scientific literature, researchers can see the relationships between different research topics.
  • Save time : Literature mapping can help researchers save time by providing an overview of the literature on a particular topic, including relevant studies and duplicated work.
  • Improve collaboration : Literature mapping can help researchers to collaborate more effectively by providing a shared understanding of the research landscape. This improves communication, and facilitates the workflow between different disciplines.
  • Inform decision-making : Literature mapping can help researchers to make assertive decisions. This can be especially useful for policymakers and other decision-makers who need to make decisions based on scientific evidence.

Types of Literature Mapping

Feature mapping.

Feature mapping is a technique used primarily in data analysis and machine learning to identify patterns and relationships between features of a dataset. It involves analyzing the data and plotting the relationships between different features of the dataset on a map or chart.

Some of the main features include:

  • Identification of relationships : Feature mapping can help identify the relationships between different features or variables in a dataset. This can allow for better modeling and prediction of outcomes.
  • Pattern recognition : By plotting the relationships between features of a dataset, feature mapping can help identify patterns and anomalies that may not be immediately apparent in the raw data.
  • Visualization : Feature mapping often involves creating visual representations of the relationships between features of a dataset. This can help make the data easier to understand and interpret.
  • Dimension reduction : When dealing with large datasets with many features, feature mapping can help reduce the dimensionality of the data. This can help simplify the data and make it easier to analyze.
  • Data clustering : Feature mapping can also help identify groups or clusters of data points that share similar features. This can allow for more targeted analysis and modeling of specific groups within the dataset.
  • Feature selection : Feature mapping can aid in the selection of the most important features from a dataset. By identifying the relationships between features, researchers can determine which features are most relevant to the outcomes they are trying to predict.

Topic Tree Mapping

Topic tree mapping is a technique used to visualize and organize the relationships between different topics or themes within a larger subject area. It involves creating a hierarchical structure of topics, with more general topics at the top and more specific subtopics branching out below.

Content Mapping

Content mapping is the process of creating a visual representation or map of the content of a document, website, or other information source. It involves breaking down the content into its constituent parts, organizing it according to a logical structure, and presenting it in a user-friendly and easily accessible way.

Taxonomic Mapping

Taxonomic mapping is the process of assigning different taxonomic categories to specific objects or organisms based on their characteristics, traits, and other distinguishing features. This mapping enables the organization and identification of different species and helps researchers and scientists to conduct various studies and experiments related to their classification, evolution, and diversity.

Concept Mapping

Concept Mapping is a visual representation of the relationships between concepts and ideas in a particular field. It involves identifying key concepts, and organizing them into a hierarchical structure. It can help to identify gaps in knowledge and aid in the development of new theories.

Rhetorical Mapping

Rhetorical mapping is a process used in communication studies and critical discourse analysis to analyze the structure and content of discourse. It involves creating a visual representation or diagram of a text or speech that identifies its various components, such as arguments, claims, evidence, and rhetorical strategies used to persuade the audience. Rhetorical mapping allows researchers to understand how the speaker or writer uses language and persuasion techniques to influence the audience’s beliefs and attitudes.

Citation Mapping

Citation Mapping involves tracing the citation history of a particular article, and identifying the articles that have cited it. This can help to identify the impact of the article on the field, and identify related research.

Tools for Literature Mapping

  • Citation Gecko : Citation Gecko is a web-based tool that allows users to quickly and easily search for and download citation data from various academic databases. It streamlines and simplifies the process of finding and organizing citations for research projects.
  • Inciteful : Inciteful is a literature-mapping tool that visualizes citation networks and identifies key authors and articles within a particular field of research. It can be used to explore the literature on a specific topic, as well as to identify gaps in current research.
  • OpenKnowledge : OpenKnowledge is an online platform for sharing and discovering research papers and other scholarly materials. It enables users to search for and download documents, as well as to connect with other researchers who are working in the same field.
  • ConnectedPapers : ConnectedPapers is a search engine that allows users to explore citation networks and discover the most influential papers and authors in a particular field. It uses citation information to uncover relationships between different papers and to suggest potentially relevant articles to read.
  • LitMaps : LitMaps is a mapping tool that allows users to explore the relationships between different articles and concepts within a particular field of study. It visualizes the connections between different scholarly articles and helps users to develop a deeper understanding of the underlying themes and concepts within a particular field.
  • Local Citation Network : Local Citation Network is a tool for mapping the relationships between different articles and authors within a particular geographic area. It allows users to explore the research in progress in a particular region and to identify potential collaborators and sources of funding.
  • CoCites : CoCites is a literature-mapping tool that identifies the most frequently cited articles and authors within a particular field. It allows users to explore the relationships between different papers and to identify key areas of research.
  • VOSviewer : VOSviewer is a tool for visualizing citation networks and identifying key authors, papers, and concepts within a particular field of research. It allows users to explore the relationships between different papers and to identify areas of overlap and potential collaboration.
  • ResearchRabbit : ResearchRabbit is a web-based research tool that allows users to search for and collect scholarly articles and other research materials. It streamlines the research process by helping users to find relevant articles and to organize and annotate their findings.

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Here's how to use Litmaps to find articles, stay organized and accomplish your literature review more efficiently.

Marina Kisley avatar

Whether you're starting on your first literature review, or your hundredth, you can streamline your search and management of literature by using Litmaps. By finding and suggesting literature visually, Litmaps lets you:

See how literature connects

Find relevant articles

Not miss important papers

Get updated on changing literature

Stay organized

In this article, we'll cover all you need to know about accomplishing your literature review with Litmaps.

What's a literature review?

A literature review is a summary of the existing knowledge and research on a particular subject. By identifying gaps in the literature, it provides a foundation for future research. As such, it’s a crucial first step in any research project.

A literature review serves several purposes:

identifies knowledge gaps

evaluates the quality of existing research

provides a foundation for newly presented research

Looking at existing examples of literature reviews is beneficial to get a clear understanding of what they entail. Find examples of a literature review by using an academic search engine (e.g. Google Scholar). As a starting point, search for your keyword or topic along with the term "literature review".

Example Literature Review, with Litmaps

Now, we'll walk through all the steps involved in how to do a literature review. Keep in mind, a literature review isn't a straight line from the first to last step. You'll loop over some of these steps, repeating them iteratively until you're satisfied. However, these steps are the basic structure you'll need to successfully complete a literature review.

Let's get started!

Define your research question or topic

First, identify your research question or topic, making it as narrow as possible.

In our literature review example, we're examining the effects of urbanization on the migration of birds.

Search for relevant literature

Now, we get into the thick of the literature review by diving into the existing scientific publications on our subject.

There are many ways to search for literature, and it can be overwhelming when considering the thousands of resources and databases available. In this example, we'll follow a simple but comprehensive strategy with 3 steps:

Find one or more "starting articles"

Search for related literature using Litmaps

Expand and repeat until satisfied

Repeat these steps until you are satisfied with the coverage of sources you have. You'll know you've covered everything once you don't find any more relevant articles on your topic.

💡 Use the techniques in the next step, "Evaluate the sources" to decide if an article is relevant or not to your work.

Find starting articles

To get started, look for just one paper on your topic .

In our example, we start by searching for our topic in Google Scholar and selecting the most relevant article. Here, we find "Bird Migration Advances More Strongly in Urban Environments".

Tip: Look for highly-cited articles. In this example, our starting paper has been cited 174 times. That will make it easier to find more related literature in the next step.

how to create a literature review map

Find related literature using Litmaps

Next, we'll find additional literature on our topic, by using our article from the last step as a starting point.

Litmaps can find relevant literature from a single article by using the citation network. By looking at how this article connects to the rest of the scientific literature (through citations and references), Litmaps finds relevant and important articles on your topic.

Here's how to find related literature to your initial article:

Go to the Litmaps app and set up a free account

Click the search bar at the top left.

Type in the name or DOI of your starting article and hit enter to see the results. Select your article and click "Explore Related Articles".

Examine your article's Litmap and the suggested articles. The Litmap shows the top connected papers based on your article's citations and references.

how to create a literature review map

Expand and repeat your search

Although your initial Litmap will give you a good idea of the scientific literature related to your input article, it's only a small part of the bigger picture.

To dive deeper into your topic, click "More like this" for articles you find relevant. After you've done this for a few papers, you can hit "Update Results". Litmaps will use these articles as inputs to the search algorithm in order to find more relevant literature.

how to create a literature review map

Just like before, you can save articles that seem important by Tagging them. It's easy to forget or lose track of work, so saving early and often is a good practice.

Evaluate the sources

As you search for articles, you'll need to decide if they are important or not for your topic.

For each article, identify its relevance, quality and importance for your topic. The good news is you don't need to read an entire article to figure this out. Before even opening up the article, you can check the following to evaluate its importance for you: ​

🔍 1️⃣ Date of publication → How recent is the paper? Newer papers have less citations because they simply haven't been around long enough to be cited by even newer research.​

🔍 2️⃣ Citation count → This is the number of other papers that have cited this one in their work. Has it been cited heavily since publication, or overlooked by the community?

🔍 3️⃣ Journal → Do you recognize it? Is it peer-reviewed? Impactful? Most papers on Litmaps are peer-reviewed, but some may be pre-prints.

🔍 4️⃣ Authors → Do you recognize the authors? Learn these names and you'll start to recognize the key contributors in your field.

🔍 5️⃣ Well-written abstract → Can you understand the gist from the abstract? If not, the paper itself may be a challenge to read. ​ ​

how to create a literature review map

Read and analyze the sources

Now that you've collected some articles on your topic, and reviewed their metadata to ensure their relevance, you're ready to start reading!

Take notes on the key findings, methodologies, and theoretical frameworks used in the articles you read.

Use a research-friendly note-taking software, like Obsidian, that provide tagging mechanisms to keep track of key concepts and how they connect. The more you link your notes to one another, the better you can learn and form new ideas .

Organize the literature

As you read and take notes on your articles, make sure to keep your sources organized. You can organize your literature according to themes, subtopics, or categories, whatever helps you to later outline the layout of your literature review.

Write the literature review

You've collected dozens, or perhaps hundreds of sources. You've reviewed each one, taken notes, and tried to stay organized throughout the process. Now, you're well-equipped to start writing up your literature review.

In this step, you'll summarize and synthesize the findings from all the sources you've analyzed. Start with an introduction that defines the research question, followed by the themes, subtopics, or categories identified. After that, provide a discussion or conclusion that addresses any gaps in the literature to motivate future research. Lastly, edit and revise your review to ensure it is well-structured, clear, and concise.

Depending on your field or project, you may have different objectives for your literature review. You could be doing a literature review to learn a new field, or to write a systematic review, a meta-analysis, an umbrella review, or another kind of review article. Make sure to review the requirements, expectations and specific best practices for your kind of review.

how to create a literature review map

This review on the Urban effects on native avifauna neatly summarizes a range of articles in a table, with corresponding notes and references for each one. ​

Cite and reference the sources

The final the step to your literature review is to make sure you've accurately referenced all the sources you used in the literature review. Consider any referencing style requirements of the institution, journal or venue you're submitting to. APA is the most common. However, you may need to familiarize yourself with other citation styles such as MLA, Chicago, or MHRA depending on your venue. See the image below for a literature review example APA of references.

To create a bibliography from the articles you've collected on Litmaps, simply:

Export articles from Litmaps

Import articles into a reference manager

Save them as the necessary file-type. For example, either directly as a bibliography ( Zotero example ), or as a BibTeX that will be formatted in you writing software ( Overleaf example ).

A successful literature review tells a brief story about the topic at hand and leaves the reader satisfied with the state of the topic, field or question up to this point in time. Most importantly, a high-quality literature review addresses any gaps in the field and frame any newly presented research to follow.

To create a high quality literature review, it's important to understand the key steps required and look at the many literature review examples available.

We hope this article provided all you to need to know to get started on your literature review - good luck!

Literature Reviews

  • What is a Literature Review?
  • Concept Mapping
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Concept map example: Chocolate Purchasing Factors

What is concept mapping.

Concept Maps are a way to graphically represent ideas and how they relate to each other.

Concept maps may be simple designs illustrating a central theme and a few associated topics or complex structures that delineate hierarchical or multiple relationships.

J.D. Novak developed concept maps in the 1970's to help facilitate the research process for his students. Novak found that visually representing thoughts helped students freely associate ideas without being blocked or intimidated by recording them in a traditional written format.

Concept mapping involves defining a topic; adding related topics; and linking related ideas

Use Bubbl.us or search for more free mind-mapping tools on the web.

More Examples of Concept Maps

  • Govt Factors in Consumer Choice
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Literature review toolkit for policy studies: Concept mapping

Why create a concept map.

A concept map is a visualization of key idea in your research and the relationships between them. To create a concept map, pick out the main concepts of your topic and brainstorm everything you know about them, drawing shapes around your concepts and clustering the shapes in a way that's meaningful to you. How can this help?

  • Helps you pull back to see the broader concepts at play.
  • Can help identify the subject-based tool where literature can be found. 
  • Helps clarify both what you already know and where you have gaps in your knowledge.

how to create a literature review map

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You are here, structuring your ideas: creating a literature map.

It is important to have a plan of the areas to be discussed, using this to indicated how these will link together. In the overall structure of the literature review, there should be a logical flow of ideas and within each paragraph there should be a clear theme, around which related ideas are explored and developed. A literature map can be useful for this purpose as it enables you to create a visual representation of the themes and how they could relate to one another.

A literature map (Cresswell, 2011) is a two dimensional diagrammatic representation of information where links are made between concepts by drawing arrows (which could be annotated to define the nature of these links). Constructing a literature map helps you to:

  • develop your understanding of the key issues and research findings in the literature
  • to organise ideas in your mind
  • to see more clearly how different research studies relate to one another and to group those with similar findings.

Your map can then be used as a plan for your literature review.

As well has helping you to organise the literature for your review, a literature map can be used to help you analyse the information in a particular journal article, supporting the exploration of strengths and weaknesses of the methodology and the resultant findings and enabling you to explore how key themes and concepts in the article link together.

It is important to represent the different views and any conflicting research findings that exist in the literature (Newby, 2014). There is a danger of selective referencing, only including literature that supports your own beliefs and findings, disregarding alternative views. This should be avoided as it is based on the assumption that your views are the correct ones, and it is possible that you could miss key ideas and findings that could take your research in new and exciting directions.

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Literature Reviews

  • What is a Literature Review?
  • Steps for Creating a Literature Review
  • Providing Evidence / Critical Analysis
  • Challenges when writing a Literature Review
  • Systematic Literature Reviews

Developing a Literature Review

1. Purpose and Scope

To help you develop a literature review, gather information on existing research, sub-topics, relevant research, and overlaps. Note initial thoughts on the topic - a mind map or list might be helpful - and avoid unfocused reading, collecting irrelevant content.  A literature review serves to place your research within the context of existing knowledge. It demonstrates your understanding of the field and identifies gaps that your research aims to fill. This helps in justifying the relevance and necessity of your study.

To avoid over-reading, set a target word count for each section and limit reading time. Plan backwards from the deadline and move on to other parts of the investigation. Read major texts and explore up-to-date research. Check reference lists and citation indexes for common standard texts. Be guided by research questions and refocus on your topic when needed. Stop reading if you find similar viewpoints or if you're going off topic.

You can use a "Synthesis Matrix" to keep track of your reading notes. This concept map helps you to provide a summary of the literature and its connections is produced as a result of this study. Utilizing referencing software like RefWorks to obtain citations, you can construct the framework for composing your literature evaluation.

2. Source Selection

Focus on searching for academically authoritative texts such as academic books, journals, research reports, and government publications. These sources are critical for ensuring the credibility and reliability of your review. 

  • Academic Books: Provide comprehensive coverage of a topic.
  • Journal Articles: Offer the most up-to-date research and are essential for a literature review.
  • Research Reports: Detailed accounts of specific research projects.
  • Government Publications: Official documents that provide reliable data and insights.

3. Thematic Analysis

Instead of merely summarizing sources, identify and discuss key themes that emerge from the literature. This involves interpreting and evaluating how different authors have tackled similar issues and how their findings relate to your research.

4. Critical Evaluation

Adopt a critical attitude towards the sources you review. Scrutinize, question, and dissect the material to ensure that your review is not just descriptive but analytical. This helps in highlighting the significance of various sources and their relevance to your research.

Each work's critical assessment should take into account:

Provenance:  What qualifications does the author have? Are the author's claims backed up by proof, such as first-hand accounts from history, case studies, stories, statistics, and current scientific discoveries? Methodology:  Were the strategies employed to locate, collect, and evaluate the data suitable for tackling the study question? Was the sample size suitable? Were the findings properly reported and interpreted? Objectivity : Is the author's viewpoint impartial or biased? Does the author's thesis get supported by evidence that refutes it, or does it ignore certain important facts? Persuasiveness:  Which of the author's arguments is the strongest or weakest in terms of persuasiveness? Value:  Are the author's claims and deductions believable? Does the study ultimately advance our understanding of the issue in any meaningful way?

5. Categorization

Organize your literature review by grouping sources into categories based on themes, relevance to research questions, theoretical paradigms, or chronology. This helps in presenting your findings in a structured manner.

6. Source Validity

Ensure that the sources you include are valid and reliable. Classic texts may retain their authority over time, but for fields that evolve rapidly, prioritize the most recent research. Always check the credibility of the authors and the impact of their work in the field.

7. Synthesis and Findings

Synthesize the information from various sources to draw conclusions about the current state of knowledge. Identify trends, controversies, and gaps in the literature. Relate your findings to your research questions and suggest future directions for research.

Practical Tips

  • Use a variety of sources, including online databases, university libraries, and reference lists from relevant articles. This ensures a comprehensive coverage of the literature.
  • Avoid listing sources without analysis. Use tables, bulk citations, and footnotes to manage references efficiently and make your review more readable.
  • Writing a literature review is an ongoing process. Start writing early and revise as you read more. This iterative process helps in refining your arguments and identifying additional sources as needed.  

Brown University Library (2024) Organizing and Creating Information. Available at: https://libguides.brown.edu/organize/litreview (Accessed: 30 July 2024).

Pacheco-Vega, R. (2016) Synthesizing different bodies of work in your literature review: The Conceptual Synthesis Excel Dump (CSED) technique . Available at: http://www.raulpacheco.org/2016/06/synthesizing-different-bodies-of-work-in-your-literature-review-the-conceptual-synthesis-excel-dump-technique/ (Accessed: 30 July 2024).

Study Advice at the University of Reading (2024) Literature reviews . Available at: https://libguides.reading.ac.uk/literaturereview/developing (Accessed: 31 July 2024).

Further Reading

Frameworks for creating answerable (re)search questions  How to Guide

Literature Searching How to Guide

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Literature Mapping

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how to create a literature review map

What is Literature Mapping?

Literature mapping is a way of discovering scholarly articles by exploring connections between publications.

Similar articles are often linked by citations, authors, funders, keywords, and other metadata. These connections can be explored manually in a database such as Scopus or by the use of free browser-based tools such as Connected Papers , L itMaps , and Open Knowledge Maps . 

The following is an introduction to these four methods. 

Video Tutorial (24min)

Literature mapping in 30 minutes (slides).

  • Literature Mapping in 30 Minutes Fall 2023 (slides)
  • Next: Manual Mapping >>
  • Last Updated: Dec 15, 2023 3:29 PM
  • URL: https://libguides.princeton.edu/litmapping

Literature Review Example

A literature review is a summary of the existing knowledge and research on a particular subject. by identifying gaps in the literature, it provides a foundation for future research. as such, it’s a crucial first step in any research project..

What is a literature review?

A literature review serves several purposes:

  • identifies knowledge gaps
  • evaluates the quality of existing research
  • provides a foundation for newly presented research

Looking at existing examples of literature reviews is beneficial to get a clear understanding of what they entail. Find examples of a literature review by using an academic search engine (e.g. Google Scholar). As a starting point, search for your keyword or topic along with the term "literature review".

Example of literature review

Identify the research question or topic, making it as narrow as possible. In this example of a literature review, we review the anxiolytic (anti-anxiety) activity of Piper methysticum , or Kava .

Let's walk through the steps in the process with this literature review example.

Define the research question

First, identify the research question or topic, making it as narrow as possible. In this literature review example, we're examining the effects of urbanization on the migration of birds.

Search for relevant literature

Searching for relevant studies is arguably the most important aspect of the literature review.

Start by identifying keywords and phrases related to the topic and use them to search academic journals and databases ( Google Scholar , BASE , PubMed , etc.). For our example, you might start with "the effects of urbanization on bird migration", but after researching the field, discover that other terms like "avian migration" and "avian populations" are more commonly used.

Search for your keywords in Litmaps to find some initial articles to explore the field from. You can then use Litmaps to find additinal sources and curate a whole library of literature on your topic.

how to create a literature review map

Search for your keywords in Litmaps, and select a starting article. This will return a visualization containing suggestions for relevant articles on your literature review topic. Review these to start curating your library.

Evaluate the sources

Evaluate the relevance and quality of the sources found by reading abstracts of the most relevant articles. Additionally, consider the publication venue, year of publication and other salient measures to identify the reliability and relevance of the source.

how to create a literature review map

Read and analyze the sources

Take notes on the key findings, methodologies, and theoretical frameworks used in the studies.

Use a research-friendly note-taking software, like Obsidian , that provide #tags to keep track of key concepts.

Organize the literature

Organize the literature according to themes, subtopics, or categories, which will help outline the layout of the literature review.

Note on an example paper with summary and using tags to organize.

Tag keywords using a tool like Obsidian to help organize papers into subtopics for the review.

Write the literature review

Summarize and synthesize the findings from the sources analyzed. Start with an introduction that defines the research question, followed by the themes, subtopics, or categories identified. After that, provide a discussion or conclusion that addresses any gaps in the literature to motivate future research. Lastly, edit and revise your review to ensure it is well-structured, clear, and concise. The example below is from a review paper, which includes a table comparing the different sources evaluated. Such tables can be useful if you are conducting a comprehensive review.

Table of contents for literature review example paper on kava.

If you're conducting a comprehensive review, you can include a table of sources reviewed in your process, like the one above from this publication .

Cite and reference the sources

Lastly, cite and reference the sources used in the literature review. Consider any referencing style requirements of the institution or journal you're submitting to. APA is the most common. However, you may need to familiarize yourself with other citation styles such as MLA, Chicago, or MHRA depending on your venue. See the image below for a literature review example APA of references. To cite references you've saved in Litmaps, you can move your saved articles from Litmaps to a reference manager (i.e. Zotero, Mendeley, EndNote, etc.) and then export their bibliography from there. Here's how to export articles from Litmaps.

Table of contents for literature review example paper on kava.

Use a reference manager tool like Zotero to easily export which makes them easy to manage, like in this APA literature review example.

A successful literature review tells a brief story about the topic at hand and leaves the reader a clear notion of what has been covered. Most importantly, a literature review addresses any gaps in the field and frames newly presented research. Understand the key steps and look at literature review examples in order to create a high quality review.

Header image Forest & Kim Starr, used under Creative Commons BY 3.0

how to create a literature review map

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Writing an effective literature review

Lorelei lingard.

Schulich School of Medicine & Dentistry, Health Sciences Addition, Western University, London, Ontario Canada

In the Writer’s Craft section we offer simple tips to improve your writing in one of three areas: Energy, Clarity and Persuasiveness. Each entry focuses on a key writing feature or strategy, illustrates how it commonly goes wrong, teaches the grammatical underpinnings necessary to understand it and offers suggestions to wield it effectively. We encourage readers to share comments on or suggestions for this section on Twitter, using the hashtag: #how’syourwriting?

This Writer’s Craft instalment is the first in a two-part series that offers strategies for effectively presenting the literature review section of a research manuscript. This piece alerts writers to the importance of not only summarizing what is known but also identifying precisely what is not, in order to explicitly signal the relevance of their research. In this instalment, I will introduce readers to the mapping the gap metaphor, the knowledge claims heuristic, and the need to characterize the gap.

Mapping the gap

The purpose of the literature review section of a manuscript is not to report what is known about your topic. The purpose is to identify what remains unknown— what academic writing scholar Janet Giltrow has called the ‘knowledge deficit’ — thus establishing the need for your research study [ 1 ]. In an earlier Writer’s Craft instalment, the Problem-Gap-Hook heuristic was introduced as a way of opening your paper with a clear statement of the problem that your work grapples with, the gap in our current knowledge about that problem, and the reason the gap matters [ 2 ]. This article explains how to use the literature review section of your paper to build and characterize the Gap claim in your Problem-Gap-Hook. The metaphor of ‘mapping the gap’ is a way of thinking about how to select and arrange your review of the existing literature so that readers can recognize why your research needed to be done, and why its results constitute a meaningful advance on what was already known about the topic.

Many writers have learned that the literature review should describe what is known. The trouble with this approach is that it can produce a laundry list of facts-in-the-world that does not persuade the reader that the current study is a necessary next step. Instead, think of your literature review as painting in a map of your research domain: as you review existing knowledge, you are painting in sections of the map, but your goal is not to end with the whole map fully painted. That would mean there is nothing more we need to know about the topic, and that leaves no room for your research. What you want to end up with is a map in which painted sections surround and emphasize a white space, a gap in what is known that matters. Conceptualizing your literature review this way helps to ensure that it achieves its dual goal: of presenting what is known and pointing out what is not—the latter of these goals is necessary for your literature review to establish the necessity and importance of the research you are about to describe in the methods section which will immediately follow the literature review.

To a novice researcher or graduate student, this may seem counterintuitive. Hopefully you have invested significant time in reading the existing literature, and you are understandably keen to demonstrate that you’ve read everything ever published about your topic! Be careful, though, not to use the literature review section to regurgitate all of your reading in manuscript form. For one thing, it creates a laundry list of facts that makes for horrible reading. But there are three other reasons for avoiding this approach. First, you don’t have the space. In published medical education research papers, the literature review is quite short, ranging from a few paragraphs to a few pages, so you can’t summarize everything you’ve read. Second, you’re preaching to the converted. If you approach your paper as a contribution to an ongoing scholarly conversation,[ 2 ] then your literature review should summarize just the aspects of that conversation that are required to situate your conversational turn as informed and relevant. Third, the key to relevance is to point to a gap in what is known. To do so, you summarize what is known for the express purpose of identifying what is not known . Seen this way, the literature review should exert a gravitational pull on the reader, leading them inexorably to the white space on the map of knowledge you’ve painted for them. That white space is the space that your research fills.

Knowledge claims

To help writers move beyond the laundry list, the notion of ‘knowledge claims’ can be useful. A knowledge claim is a way of presenting the growing understanding of the community of researchers who have been exploring your topic. These are not disembodied facts, but rather incremental insights that some in the field may agree with and some may not, depending on their different methodological and disciplinary approaches to the topic. Treating the literature review as a story of the knowledge claims being made by researchers in the field can help writers with one of the most sophisticated aspects of a literature review—locating the knowledge being reviewed. Where does it come from? What is debated? How do different methodologies influence the knowledge being accumulated? And so on.

Consider this example of the knowledge claims (KC), Gap and Hook for the literature review section of a research paper on distributed healthcare teamwork:

KC: We know that poor team communication can cause errors. KC: And we know that team training can be effective in improving team communication. KC: This knowledge has prompted a push to incorporate teamwork training principles into health professions education curricula. KC: However, most of what we know about team training research has come from research with co-located teams—i. e., teams whose members work together in time and space. Gap: Little is known about how teamwork training principles would apply in distributed teams, whose members work asynchronously and are spread across different locations. Hook: Given that much healthcare teamwork is distributed rather than co-located, our curricula will be severely lacking until we create refined teamwork training principles that reflect distributed as well as co-located work contexts.

The ‘We know that …’ structure illustrated in this example is a template for helping you draft and organize. In your final version, your knowledge claims will be expressed with more sophistication. For instance, ‘We know that poor team communication can cause errors’ will become something like ‘Over a decade of patient safety research has demonstrated that poor team communication is the dominant cause of medical errors.’ This simple template of knowledge claims, though, provides an outline for the paragraphs in your literature review, each of which will provide detailed evidence to illustrate a knowledge claim. Using this approach, the order of the paragraphs in the literature review is strategic and persuasive, leading the reader to the gap claim that positions the relevance of the current study. To expand your vocabulary for creating such knowledge claims, linking them logically and positioning yourself amid them, I highly recommend Graff and Birkenstein’s little handbook of ‘templates’ [ 3 ].

As you organize your knowledge claims, you will also want to consider whether you are trying to map the gap in a well-studied field, or a relatively understudied one. The rhetorical challenge is different in each case. In a well-studied field, like professionalism in medical education, you must make a strong, explicit case for the existence of a gap. Readers may come to your paper tired of hearing about this topic and tempted to think we can’t possibly need more knowledge about it. Listing the knowledge claims can help you organize them most effectively and determine which pieces of knowledge may be unnecessary to map the white space your research attempts to fill. This does not mean that you leave out relevant information: your literature review must still be accurate. But, since you will not be able to include everything, selecting carefully among the possible knowledge claims is essential to producing a coherent, well-argued literature review.

Characterizing the gap

Once you’ve identified the gap, your literature review must characterize it. What kind of gap have you found? There are many ways to characterize a gap, but some of the more common include:

  • a pure knowledge deficit—‘no one has looked at the relationship between longitudinal integrated clerkships and medical student abuse’
  • a shortcoming in the scholarship, often due to philosophical or methodological tendencies and oversights—‘scholars have interpreted x from a cognitivist perspective, but ignored the humanist perspective’ or ‘to date, we have surveyed the frequency of medical errors committed by residents, but we have not explored their subjective experience of such errors’
  • a controversy—‘scholars disagree on the definition of professionalism in medicine …’
  • a pervasive and unproven assumption—‘the theme of technological heroism—technology will solve what ails teamwork—is ubiquitous in the literature, but what is that belief based on?’

To characterize the kind of gap, you need to know the literature thoroughly. That means more than understanding each paper individually; you also need to be placing each paper in relation to others. This may require changing your note-taking technique while you’re reading; take notes on what each paper contributes to knowledge, but also on how it relates to other papers you’ve read, and what it suggests about the kind of gap that is emerging.

In summary, think of your literature review as mapping the gap rather than simply summarizing the known. And pay attention to characterizing the kind of gap you’ve mapped. This strategy can help to make your literature review into a compelling argument rather than a list of facts. It can remind you of the danger of describing so fully what is known that the reader is left with the sense that there is no pressing need to know more. And it can help you to establish a coherence between the kind of gap you’ve identified and the study methodology you will use to fill it.

Acknowledgements

Thanks to Mark Goldszmidt for his feedback on an early version of this manuscript.

PhD, is director of the Centre for Education Research & Innovation at Schulich School of Medicine & Dentistry, and professor for the Department of Medicine at Western University in London, Ontario, Canada.

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