Background Research/Literature Review Joyce Maru – Capacity Development Officer Nicholas Ndiwa - Database Manager & Analyst RM Group Francis Wanyoike – Research Technician

ILRI Graduate Fellows skills trainingNairobi 16th September 2013

Session Objectives

• Evaluate importance of literature review in the research process

• Identify the components of a literature review process

• Identify and evaluate different information sources for literature review

• Be able to use different sources of information, apply various search techniques and organise retrieved information.

• Be able to apply appropriate citation and referencing in their academic work

• Analyse and critic a literature review on a journal paper

Research ProcessProject development implementation Communicating findings

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Research Process

• Problem definition• Literature review• Objective & hypothesis • Study design

• Sampling• Data collection • Data management• Formal analysis

• Reporting• Publication• Data archiving or

publication

Project development implementation Communicating findings

Definition of problem domain & how the specific problem fits in

Identification of gaps, appropriate methods & theory

Research will approve or disapprove the hypothesis

Research strategy to be used, sample size, sampling frame

Sample selection Data collection tools Database development and

data cleaning Exploration, description,

modelling & interpretation of statistical outputs

Choice of reporting media & format

Advise on presentation of results

Data sharing media

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Problem Identification

Research is a problem solving undertaking

Definition:. Is the identification of a phenomenon to be studied

Problem IdentificationHierarchical and systematic

ProblemExisting gaps/emerging

problems

Hazard Levels TopicPriority consideration,

setting the scope

ScopeSubject and Geographical

AreaProfessional background and

Institutional affiliation

Why Literature review?

What are the aims and objectives of literature review?

10 minutes group discussion exercise

Aim of your literature search

• To retrieve information of direct relevance to your research

• To avoid being sidetracked or overloaded with material of only peripheral interest

Purpose of a literature review• To find out what other scholars are writing about your topic

• To learn methods and approaches that are appropriate for your study

• To learn appropriate theory to underpin your work

• To highlight gaps and under-researched areas, to identify current debates and controversies

• To help focus your research and sharpen and refine your research questions

• To avoid reinventing the wheel, to demonstrate to your audience that your contribution is new – different from everyone else’s– Nobody will believe you unless you can demonstrate through the literature

review that you know what everyone else has done

• Demonstrate capability – Msc/PhD

Planning your literature search

• You should consider at an early stage some search parameters, e.g.

– How far back will you look for material? 5-10 years is a common time frame. Seminal or influential works are exceptional

– Do you plan to read material about a particular geographical region only?

– What type of material do you want to trace? Books, journals, theses, government reports, Internet resources?

– What language?

Types of information sources

• Secondary sources– Bibliographies, indexes and abstracts that you can

use to help you to find the relevant papers/documents

• Primary sources– Full text of articles, books, government reports, etc.

that you need to read for your research project

Information sources: ILRI info-centre

• ILRI information services - information specialists to manage journal subscriptions and provide reference and document delivery services.

• Visit ‘Mahider', http://cgspace.cgiar.org/handle/10568/3 the repository of current research outputs; to check out multimedia resources published across the Internet

• access ILRI journals and publications on this link:http://ilriannouncements.wordpress.com/2012/03/29/accessing-journals-scopus-and-other-info-resources-at-ilri/

Other sources for Literature Reviews• Internet

– Use keyword searches in Google Scholar: http://scholar.google.com/

• Libraries, databases and subscriptions– Look through the list of journals and browse the books on the shelves to

find relevant ones

• Grey literature- theses, project reports which are not yet in public domain

• Others- expert opinions?

DISCUSSION: Strengths and weaknesses of different sources

• Books vs. journal articles vs. conference proceedings vs. the Internet

• Which tend to be the best for– Currency?– Authority?– Understandability?

• Academic papers are quality controlled – many are rejected as being incorrect or uninteresting

Evaluating sources• Is the source you are using respected in your field?

• Has the author’s name been cited by others, or have you seen it listed in other bibliographic sources?

• Are vital points referenced for you to check?

• Are the references up to date with current development in your field?

Structure of literature review

Research Topic

Specialist sub-area

Relevantprimaryresearch

Your research question

Literature search model• Example: you may be researching the growth rate of Ndama

cattle in tsetse infested areas so the bulk of the literature will be on the intersection of the three key areas

Tsetse infested area

Growth rate

Ndama Cattle

Literature search model

50%

10%

10% 10%

5%

5%5%

Tsetse infested areas

Growth rate

Ndama cattle

5%

Specialist area

Structuring/Organizing Literature Review

Broad overview /conceptual research

Description of directly related studies

The study role that extends/adds to past studies

Trypanosomosis/livestock/tsetse flies

Trypanotolerance/animal health/productivity

Ndama cattle/tryps tolerance/body weight

Structuring/organizing your literature review

• Try to follow a concept-by-concept approach in presenting the literature review, not a study-by-study approach.

• This means putting the emphasis on the results of the study, not the author.

Structuring/organizing your literature review

Framing the reviewAPPROACH DEFINITION ADVANTAGES/DISADVANTAGES

Dividing the literature into themes or categories

Distinct themes from the literature are discussed

Most popular approach. Allows integration of theoretical and empirical (research) literature. Care must be taken in ensuring that the themes are clearly related to the literature

Presenting the literature chronologically

Literature divided into time periods

Useful when examining the emergence of a topic over a period to time

Exploring the theoretical and methodological literature

Discussion of theoretical literature followed by exploration of methodological literature that would give some indication of why a particular research design might be appropriate for investigating a topic

Useful when the body of literature is largely theoretical with little or no empirical literature. Can be used to identify the need for qualitative studies

Examining theoretical literature and empirical literature in two sections

Where the topic has both theoretical and empirical literature and each is discussed separately

May tend to be a description rather than a critical review

From Carnwell and Daly, 2001

Literature search techniques• Keyword search

– To find topically relevant information from digital libraries, databases, or the Internet

– Good in most cases

• Chaining– Tracking references and citations to find articles relevant to a topic– Good where the topic is very small– Review papers are a type of chaining that offers important information on the

research topic

• Browsing– To sift through collections of potentially relevant text– Good where there are many relevant books/articles, but only a few can be

selected

SEARCH TECHNIQUES: Selecting keywords• Organize your topic into subject groups or sets

• Analyze the keywords in each subject group or set to try to find as many relevant search terms as possible

• Use a thesaurus which lists synonyms and related words, to help you think of broader and narrower terms (and alternative spellings).

• Some computer databases have an on-line subject thesaurus which you can use to find additional terms during your search

SEARCH TECHNIQUES: Boolean operators

• “AND”- or can abbreviate as “& ”- retrieves records with all the separated words

• “OR”- is a more broader option- either word

• “NOT”- records retrieved do not contain the word that follow it

• ()- parenthesis– when combining the

Boolean searches– Shows the order of

operation- as the ones inside the brackets will be done first

– Left to Right (if not specified)

• (Trypanosomosis OR Trypanosomosis) AND impact AND Kenya

Selecting keywords: an example

• Set 1: Tolerant OR “less susceptible” OR “do not succumb” OR “disease resistant” AND

• Set 2: trypanosomiasis OR trypanosomosis OR tsetse fly AND

• Set 3: “body weight” OR “body conditions”

SEARCH TECHNIQUES: Wildcard symbols (*, ?)

• Truncation- expands a word- Trypano*

• Use of an alternative spelling

• Trypano* AND Kenya

• Could be trypanosomiasis or trypanosomosis or trypanotolerance

Literature review - tips• Ideally, the bulk of your reading should come early in the investigation

• In practice a number of activities are generally in progress at the same time and reading may spill over into the data-collecting stage of your study

• You need to take care that reading does not take up more time than can be allowed, but it is rarely possible to obtain copies of all books and articles at exactly the time you need them, so there is inevitably some overlap

• Reading about your topic may give you ideas about approaches and methods which had not occurred to you

• It may also give you ideas about how you might classify and present your own data

• Keep a record of keywords and methods used as they might be needed later

• It may help you to devise a theoretical or analytical framework

Literature review

• As you read, get into the habit of examining – How authors classify their findings– How they explore relationships between facts– How facts and relationships are explained

• Methods used by other researchers may be unsuitable for your purposes

• But they may give you ideas about how you might categorize your own data, and ways in which you may be able to draw on the work of other researchers to support or refute your own arguments and conclusions

Critical review of literature

Title Author Year Full reference

Study Objective

Study type

Methodology Key finding

Recommendations

Propagated theory

Conceptual Uniqueness

Gaps/flaws/inconsistencies

Analytical framework aids in identification of issues, theories, concepts and questions that will form the basis of the literature review

Critical review of literature• Only relevant works are mentioned

• Review is more than a list of ‘what I have read’

• Uses of references– Justify and support your arguments– Allow you to make comparisons with other research– Express matters better than you could have done– Demonstrate your familiarity with your field of research

Critical review of literature

• Abuses of references– Impress your readers with the scope of your reading

– Litter your writing with names and quotations

– Replace the need for you to express your own thoughts

– Misrepresent other authors

Monitor your progress• The following should occur as you progress

– Increase in knowledge of the subject– Increase in general knowledge of the specialist

topic– Increase in your specialist vocabulary– Increase in confidence that you can complete the

task

Handling of the retrieved information

• Organized system- folders, subfolders-

• Shared systems- DropBOX https://www.dropbox.com/

• Referencing- EndNote http://endnote.com/downloads/30-day-trial

• Mendeley http://www.mendeley.com/features/

• Remember to back up your work

Citations and references• As you write up your research, you will use a citation to

indicate in your text the source of a piece of information

• A bibliography is a list of works that you have read or consulted during the course of your research but have not necessarily cited

• References give details of books, articles and any other types of material that you have cited in your text

Referencing• Referencing is a standardized method of acknowledging

sources of information and ideas that you have used in your assignment in a way that uniquely identifies their source

• Direct quotations, facts and figures, as well as ideas and theories, from both published and unpublished works must be referenced

• There are many acceptable forms of referencing (e.g. Harvard referencing style) (manual on Harvard referencing)

Practice Session• You are among authors of a paper titled “FARMERS’

PERCEPTION ON TRYPANOSOMOSIS AND TRYPANOTOLERANCE CHARACTER OF THE TAURIN SHEKO”

• You have been tasked to carry out the literature review for the paper– Develop your literature search model– List the key words– Carry out a quick literature search and list 3 papers

that you think are relevant for the paper. Give a justification for each selection

Recommended reading

Acknowledgment

1. ILRI Info-centre

2. Florence Mutua - ILRI

3. Tom Vandenbosch – RUFORUM (Regional Universities Forum for

Capacity Building)

4. Bridget McDermott - Reading University

The presentation has a Creative Commons licence. You are free to re-use or distribute this work, provided credit is given to ILRI.

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