why is it important to do a literature review in research pdf

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Conducting a literature review: why do a literature review, why do a literature review.

• How To Find "The Literature"
• Found it -- Now What?

Besides the obvious reason for students -- because it is assigned! -- a literature review helps you explore the research that has come before you, to see how your research question has (or has not) already been addressed.

You identify:

• core research in the field
• experts in the subject area
• methodology you may want to use (or avoid)
• gaps in knowledge -- or where your research would fit in

It Also Helps You:

• Publish and share your findings
• Justify requests for grants and other funding
• Identify best practices to inform practice
• Set wider context for a program evaluation
• Compile information to support community organizing

Great brief overview, from NCSU

Want To Know More?

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• Last Updated: Apr 25, 2024 1:10 PM
• URL: https://guides.lib.berkeley.edu/litreview

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Literature Reviews

• What is a literature review?
• Steps in the Literature Review Process
• Define your research question
• Determine inclusion and exclusion criteria
• Choose databases and search
• Review Results
• Synthesize Results
• Analyze Results
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What is a Literature Review?

A literature or narrative review is a comprehensive review and analysis of the published literature on a specific topic or research question. The literature that is reviewed contains: books, articles, academic articles, conference proceedings, association papers, and dissertations. It contains the most pertinent studies and points to important past and current research and practices. It provides background and context, and shows how your research will contribute to the field. 

A literature review should: 

• Provide a comprehensive and updated review of the literature;
• Explain why this review has taken place;
• Articulate a position or hypothesis;
• Acknowledge and account for conflicting and corroborating points of view

From  S age Research Methods

Purpose of a Literature Review

A literature review can be written as an introduction to a study to:

• Demonstrate how a study fills a gap in research
• Compare a study with other research that's been done

Or it can be a separate work (a research article on its own) which:

• Organizes or describes a topic
• Describes variables within a particular issue/problem

Limitations of a Literature Review

Some of the limitations of a literature review are:

• It's a snapshot in time. Unlike other reviews, this one has beginning, a middle and an end. There may be future developments that could make your work less relevant.
• It may be too focused. Some niche studies may miss the bigger picture.
• It can be difficult to be comprehensive. There is no way to make sure all the literature on a topic was considered.
• It is easy to be biased if you stick to top tier journals. There may be other places where people are publishing exemplary research. Look to open access publications and conferences to reflect a more inclusive collection. Also, make sure to include opposing views (and not just supporting evidence).

Source: Grant, Maria J., and Andrew Booth. “A Typology of Reviews: An Analysis of 14 Review Types and Associated Methodologies.” Health Information & Libraries Journal, vol. 26, no. 2, June 2009, pp. 91–108. Wiley Online Library, doi:10.1111/j.1471-1842.2009.00848.x.

Meryl Brodsky : Communication and Information Studies

Hannah Chapman Tripp : Biology, Neuroscience

Carolyn Cunningham : Human Development & Family Sciences, Psychology, Sociology

Larayne Dallas : Engineering

Janelle Hedstrom : Special Education, Curriculum & Instruction, Ed Leadership & Policy ​

Susan Macicak : Linguistics

Imelda Vetter : Dell Medical School

For help in other subject areas, please see the guide to library specialists by subject .

Periodically, UT Libraries runs a workshop covering the basics and library support for literature reviews. While we try to offer these once per academic year, we find providing the recording to be helpful to community members who have missed the session. Following is the most recent recording of the workshop, Conducting a Literature Review. To view the recording, a UT login is required.

• October 26, 2022 recording
• Last Updated: Oct 26, 2022 2:49 PM
• URL: https://guides.lib.utexas.edu/literaturereviews

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Importance of Literature Review

research proposal as a problem to investigate, it usually has to be fairly narrow and focused, and because of this it can be difficult to appreciate how one's research subject is connected to other related areas. Therefore, the overall purpose of a literature review is to demonstrate this, and to help the reader to understand how your study fits into a broader context. This paper seeks to examine this topic of literature review, its significance and role in research proposal and report. It will start by explaining in detail what literature is; by citation of different scholars and its constituent components, such as the theoretical framework. Thereafter, it will look at the importance of literature review and its role in research proposals and reports. Finally, a conclusion will be written based on this topic. A Literature Review is a critical review of existing knowledge on areas such as theories, critiques, methodologies, research findings, assessment and evaluations on a particular topic. A literature review involves a critical evaluation identifying similarities and differences between existing literatures and the work being undertaken. It reviews what have already been done in the context of a topic. Therefore, on the basis of the existing knowledge, people can build up innovative idea and concept for further research purpose (Cooper, 1998). In doing empirical literature review is reading reports of other relevant studies conducted by different researchers. In doing so, a researcher gets knowledge and experiences that were established by other researchers when conducting their studies. While Conceptual framework is a set of coherent ideas or concepts organised in a manner that makes them easy to communicate to others. It represents less formal structure and used for specific concepts and propositions derived from empirical observation and intuition (ibid). According Aveyard, H. (2010) Theoretical framework is a theoretical perspective. It can be simply a theory, but can also be more general a basic approach to understanding something. Typically, a theoretical framework consists of concepts, together with their definitions, and existing framework must demonstrate an understanding of theories, and existing framework demonstrate an understanding of theories and concepts that are relevant to the topic of your research proposal and that will relate it to the broader fields of knowledge in the class you are taking.

Related Papers

Journal of African Interdisciplinary Studies

Ronald Mensah

This article critically discusses, the relationship between conceptual framework and theoretical framework drawing on their differences and similarities. The article has made it very clear that whereas the theoretical framework is drawn from the existing theoretical literature that you review about your research topic, a conceptual framework is a much broader concept that encompasses practically all aspects of your research. The latter refers to the entire conceptualisation of your research project. It is the big picture, or vision, comprising the totality of research. Methodologically, the paper used systematic and experiential literature review to draw supporting scholarly literature by authorities in the field and made inferences, sound reasonings and logical deductions from these authorities. The primary aim of this paper is to help researchers and students to understand the convergence and the divergence of theoretical and conceptual frameworks in order to appropriately be applied in research and academic writing discourses. Understanding the conceptual framework affects research in many ways. For instance, it assists the researcher in identifying and constructing his/her worldview on the phenomenon to be investigated. Also, it is the simplest way through which a researcher presents his/her asserted remedies to the milieu he/she has created. In addition, this accentuates the reasons why a research topic is worth studying, the assumptions of a researcher, the scholars he/she agrees with and disagrees with and how he/she conceptually grounds his/her approach. Paying attention, to the theoretical framework and its impact on research, it can be mentioned that theoretical framework provides a structure for what to look for in the data, for how you think of how what you see in the data fits together, and helps you to discuss your findings more clearly, in light of what existing theories say. It helps the researcher to make connections between the abstract and concrete elements observed in the data. In conclusion, both theoretical framework and conceptual framework are good variables which are used to inform a study to arrive at logical findings and conclusions. It is therefore recommended by researchers that; a good theoretical framework should be capable of informing the concepts in a research work.

Abey Dubale

Martin Otundo Richard

ABSTRACT A number of researchers either in scientific, social or academic researchers have found it difficult to differentiate between the theoretical and conceptual framework and their importance. This is a simple overview of the basic differences and some similarities between the theoretical and conceptual framework that is aimed at helping the learners and other researchers get a fast grasp of what can help them use the two effectively in their studies. A summary has been provided at the last part of the document that can aid one get the required information in his or her research.

Tonette S Rocco , Maria Plakhotnik

Abstract This essay starts with a discussion of the literature review, theoretical framework, and conceptual framework as components of a manuscript. This discussion includes similarities and distinctions among these components and their relation to other sections of a manuscript such as the problem statement, discussion, and implications. The essay concludes with an overview of the literature review, theoretical framework, and conceptual framework as separate types of manuscripts.

Ewnetu Tamene

The impetus of this paper is the irreplaceable role yet confusing use of the term " conceptual framework " in research literature. Even though, there is a consensus among scholars of various field of study that conceptual framework is essential element of research endeavors, yet it is used interchangeably with theoretical framework, that create confusion. As a PhD student on the pre-proposal work, this makes me more anxious. Then my intent is to explore its conceptual meaning and purposes by bringing together similar meanings from different scholars with a view to shed some light on its understanding and its use in research. Hence, in attempting to address this, the following key terms; Concept, conceptual framework research design and theoretical framework are defined briefly as to help decipher the conceptual ties among them and illuminate the conceptual meaning and purpose of conceptual framework. The schematic representation of conceptual framework is developed based on the conceptual meaning provided by scholars. In doing this it is attempted to show conceptual meaning of conceptual framework in relation to research design, paradigms and philosophical assumptions that delineate it from theoretical framework. Conceptual framework serves essential role in inductive research design, while theoretical framework serves similar role in deductive research design.

This is an opinion piece on the subject of whether or not 'theoretical' and 'conceptual' frameworks are conceptual synonyms, or they refer to different constructs. Although, generally, a lot of liter ature uses these two terms interchangeably – suggesting that they are conceptually equivalent, the researcher argues that these are two different constructs – both by definition and as actualised during the research process. Thus, in this paper, the researcher starts by developing his argument by examining the role of theory in research, and then draws a distinction between areas of research that typically follow deductive versus inductive approaches, with regard to both the review of literature and data collection. The researcher then subsequently argues that whereas a deductive approach to literature review typically makes use of theories and theoretical frameworks, the induct ive approach tends to lead to the development of a conceptual framework – which may take the form of a (conceptua l) model. Examples depicting this distinction are advanced.

Nauka i društvo

Darko M Marković

Conceptual framework is the foundation of scientific research, and it is formed from previous knowledge about the researched phenomenon. It is an integral part of theoretical framework, made with the aim to include key terms, presented within the bibliography, and create a suitable platform to develop the research correctly. More often with students preparing their final papers, and not so rarely with established researchers, the problem arises when it comes to conceptualizing research. A common unknown is how to divide conceptual from theoretical framework, and what conceptual framework of scientific research actually is. The aim of this paper is to clarify conceptualization of scientific research, and, by clarifying it, to point out the significance of differentiation between conceptual and theoretical framework, going on to give basic guidelines on how to form one, and therefore ease the understanding of it and application in scientific research.

Aliya Ahmed

Elock E Shikalepo

Conducting educational research involves various stages, with an interdependence and inter-relationship which can be both iterative and progressive in nature. One of these stages is the review of literature sources related to the focus of the research. Reviewing related literature involves tracing, examining, critiquing, evaluating and eventually recommending various forms of contents to the intents of the research based on the content’s typicality, relevance, correctness and appropriateness to what the research intends to achieve. The main variables as stated in the title of the research, the research questions, the research objectives and the hypotheses, dictates the literature sources to review. Reviewing literature focuses on the existing related topics that bear relevance to the title of the research and through which reviewing, appropriate theories can be picked up as the review of related topics and phrases goes on. As soon as the related topics are reviewed and main points noted, the reviewing process proceeds to review the theories underpinning the study. Some of these theories would have been established while reviewing the related topics and can now gain momentum, while other theories can now be generated considering the title, research questions, research objectives and findings of the topics reviewed and discussed earlier. Reviewing related topics generates main points of arguments, solutions, gaps and propositions. Similarly, reviewing theories does produce the same set of corresponding or contrasting agreements, gaps and propositions. Despite reviewing different sources of literature, it is the same research at hand, with same objectives and same methodological layout. Hence, a need to shape a strategic, literature direction for the research by consolidating the key findings of the different sources reviewed, in view of the intents of the research. The process of consolidating the multiplicity of key literature findings relevant to the research into a whole single unit, with one standpoint revealing the strategic literature direction for the research, is called constructing a conceptual framework. The end product of this construction is the conceptual framework, which is the informed and consolidated results presented narratively or schematically, revealing the strategic position of the study in relation to what exists in literature.

pinky adona

Many students, both in the undergraduate and graduate levels, have difficulty discriminating the theoretical from the conceptual framework. This requires a good understanding of both frameworks in order to conduct a good investigation. This article explains the two concepts in easily understandable language. Read on to find out. Many graduating college students and even graduate students have difficulty coming up with the conceptual framework and the theoretical framework of their thesis, a required section in thesis writing that serves as the students' map on their first venture into research. The conceptual framework is almost always confused with the theoretical framework of the study. What is the difference between the conceptual and the theoretical framework? A conceptual framework is the researcher's idea on how the research problem will have to be explored. This is founded on the theoretical framework, which lies on a much broader scale of resolution. The theoretical framework dwells on time tested theories that embody the findings of numerous investigations on how phenomena occur. The theoretical framework provides a general representation of relationships between things in a given phenomenon. The conceptual framework, on the other hand, embodies the specific direction by which the research will have to be undertaken. Statistically speaking, the conceptual framework describes the relationship between specific variables identified in the study. It also outlines the input, process and output of the whole investigation. The conceptual framework is also called the research paradigm. Examples of the Theoretical and the Conceptual Framework The difference between theoretical framework and conceptual framework can be further clarified by the following examples on both concepts: Theoretical Framework: Stimulus elicits response. Conceptual Framework: New teaching method improves students' academic performance. Notice in the illustrative example that the theoretical framework basically differs from the conceptual framework in terms of scope. The theoretical framework describes a broader relationship between things. When stimulus is applied, response is expected. The conceptual framework is much more specific in defining this relationship. The conceptual framework specifies the variables that will have to be explored in the investigation. In this example, the variable " teaching method " represents stimulus while

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• Steps in Conducting a Literature Review

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.

APA7 Style resources

APA Style Blog - for those harder to find answers

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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Why is it important to do a literature review in research?

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The Importance and Role of Biostatistics in Clinical Research

 “A substantive, thorough, sophisticated literature review is a precondition for doing substantive, thorough, sophisticated research”. Boote and Baile 2005

Authors of manuscripts treat writing a literature review as a routine work or a mere formality. But a seasoned one knows the purpose and importance of a well-written literature review.  Since it is one of the basic needs for researches at any level, they have to be done vigilantly. Only then the reader will know that the basics of research have not been neglected.

The aim of any literature review is to summarize and synthesize the arguments and ideas of existing knowledge in a particular field without adding any new contributions.   Being built on existing knowledge they help the researcher to even turn the wheels of the topic of research.  It is possible only with profound knowledge of what is wrong in the existing findings in detail to overpower them.  For other researches, the literature review gives the direction to be headed for its success. 

The common perception of literature review and reality:

As per the common belief, literature reviews are only a summary of the sources related to the research. And many authors of scientific manuscripts believe that they are only surveys of what are the researches are done on the chosen topic.  But on the contrary, it uses published information from pertinent and relevant sources like

• Scholarly books
• Scientific papers
• Latest studies in the field
• Established school of thoughts
• Relevant articles from renowned scientific journals

and many more for a field of study or theory or a particular problem to do the following:

• Summarize into a brief account of all information
• Synthesize the information by restructuring and reorganizing
• Critical evaluation of a concept or a school of thought or ideas
• Familiarize the authors to the extent of knowledge in the particular field
• Encapsulate
• Compare & contrast

By doing the above on the relevant information, it provides the reader of the scientific manuscript with the following for a better understanding of it:

• It establishes the authors’  in-depth understanding and knowledge of their field subject
• It gives the background of the research
• Portrays the scientific manuscript plan of examining the research result
• Illuminates on how the knowledge has changed within the field
• Highlights what has already been done in a particular field
• Information of the generally accepted facts, emerging and current state of the topic of research
• Identifies the research gap that is still unexplored or under-researched fields
• Demonstrates how the research fits within a larger field of study
• Provides an overview of the sources explored during the research of a particular topic

Importance of literature review in research:

The importance of literature review in scientific manuscripts can be condensed into an analytical feature to enable the multifold reach of its significance.  It adds value to the legitimacy of the research in many ways:

• Provides the interpretation of existing literature in light of updated developments in the field to help in establishing the consistency in knowledge and relevancy of existing materials
• It helps in calculating the impact of the latest information in the field by mapping their progress of knowledge.
• It brings out the dialects of contradictions between various thoughts within the field to establish facts
• The research gaps scrutinized initially are further explored to establish the latest facts of theories to add value to the field
• Indicates the current research place in the schema of a particular field
• Provides information for relevancy and coherency to check the research
• Apart from elucidating the continuance of knowledge, it also points out areas that require further investigation and thus aid as a starting point of any future research
• Justifies the research and sets up the research question
• Sets up a theoretical framework comprising the concepts and theories of the research upon which its success can be judged
• Helps to adopt a more appropriate methodology for the research by examining the strengths and weaknesses of existing research in the same field
• Increases the significance of the results by comparing it with the existing literature
• Provides a point of reference by writing the findings in the scientific manuscript
• Helps to get the due credit from the audience for having done the fact-finding and fact-checking mission in the scientific manuscripts
• The more the reference of relevant sources of it could increase more of its trustworthiness with the readers
• Helps to prevent plagiarism by tailoring and uniquely tweaking the scientific manuscript not to repeat other’s original idea
• By preventing plagiarism , it saves the scientific manuscript from rejection and thus also saves a lot of time and money
• Helps to evaluate, condense and synthesize gist in the author’s own words to sharpen the research focus
• Helps to compare and contrast to  show the originality and uniqueness of the research than that of the existing other researches
• Rationalizes the need for conducting the particular research in a specified field
• Helps to collect data accurately for allowing any new methodology of research than the existing ones
• Enables the readers of the manuscript to answer the following questions of its readers for its better chances for publication
• What do the researchers know?
• What do they not know?
• Is the scientific manuscript reliable and trustworthy?
• What are the knowledge gaps of the researcher?

22. It helps the readers to identify the following for further reading of the scientific manuscript:

• What has been already established, discredited and accepted in the particular field of research
• Areas of controversy and conflicts among different schools of thought
• Unsolved problems and issues in the connected field of research
• The emerging trends and approaches
• How the research extends, builds upon and leaves behind from the previous research

A profound literature review with many relevant sources of reference will enhance the chances of the scientific manuscript publication in renowned and reputed scientific journals .

References:

http://www.math.montana.edu/jobo/phdprep/phd6.pdf

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