A clear methodology for finding studies is an essential element of a scoping review. Your approach needs to be well documented and as replicable as possible. This is the stage of a scoping review where consultation with a librarian is valuable. We have extensive experience with the databases most often used in reviews. We know what they cover (and miss) and how they vary. Through conversation and exploratory searching, librarians can help you find the right balance between search sensitivity and specificity, and they can assist in finalizing a valid search protocol.
Searching is an iterative process, and you will already have done some exploratory searching before you get to this point in the review process. During protocol development, you will have identified relevant databases, search terms, and studies. These will help you build your ultimate search strategy that you will report out in your methods section (the more detailed and transparent you are about this process, the better, so it helps to keep track).
Test your search methods with articles you know should match. Simply add the article title to the last bar of your search and run it again. If that article doesn't appear, find it in the database. Then look over the words in the abstract and subject terms to determine why you didn't find it. Adjust your search accordingly.
Document your search! Take advantage of database features to save searches. Keep a record of all your final searches. Consider keeping a PRISMA flow diagram of your work.
For a scoping review, you want to find all possible permutations for your search terms to make sure you don't miss anything. Beyond scouring existing reviews and encyclopedia articles, you also want to make sure you find the appropriate controlled vocabulary for your concepts.
Search for the appropriate MeSH Headings in PubMed.
In EBSCO, you can check to see if there is a thesaurus for your chosen database(s).
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