Literature search A systematic and well- organised search from the already published data to identify a breadth of good quality references on a specific topic.
Uses of Literature Search It forms the basis of the literature review It helps in finding the gaps in the literature It may find the answer to your research question It helps in revising and modifying the research question
Difference between literature search and literature review
Literature search In general, a literature search is the process of seeking out and identifying the existing literature related to a topic or question of interest Literature review A literature review is the organized synthesis of the information found in the existing literature. A literature search is typically the first step of a literature review.
Systematic Review Secondary data is collected systematically, critically evaluated and a collective view of available evidence is synthesized. relatively smaller number of studies pertaining to a focused research question Scoping Review A scoping review seeks to present an overview of a potentially large and diverse body of literature pertaining to a broad topic . answers questions with a broader “scope” and correspondingly more expansive inclusion criteria
Steps of literature search
Step 1 Decide the topic Topic or the research question determines the direction of literature search . The aims are; to find the existing literature about the topic of interest, and look for gaps and answers to the research question.
Example
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Formulate your research question from the gap identified
2. Choose the Right Keywords Look for your research question to find keywords Look for synonyms MeSH (Medical Subject Heading) terms for Pubmed
Example Research question: Can an OSCE effectively assess communication skills in undergraduate medical students? Concepts : OSCE Communication Skills Undergraduate Medical Student Assessment
Step 3: Identify D atabase Database: Library databases search for published and academic resources, including articles in journals, newspapers, and magazines PubMed Google Scholar ERIC Medline
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Step 4: Boolean Commands Standard Boolean Logic for database searching uses 3 relationships among search terms . AND OR NOT It is both simple and powerful.
AND BOTH terms included in any results. If a record has only one of the two terms, it will not be retrieved. If the record has neither term, it will not be retrieved . Used for different terms
What does this do to the amount of records retrieved? Narrows the result
OR Any one of the terms are in the results ‘OR’ will retrieve the record if both are included. Used for similar terms
What does OR do to the amount of records retrieved? Broadens the result
NOT Excludes any results containing the term Records containing both will not be retrieved . Used in terms which are not required
What does NOT do to the amount of records retrieved? Exclude the results
Step 5: Filters/ Limits Use filters to help you refine your search, rather than adding those keywords to the search . Filters include: article/publication type , age , language , publication years, and species.
Example Use an Age Filter, rather than adding “pediatric” or “geriatric” to your search.