Literature reviews aim to retrieve all results that are relevant to your topic through systematic searching. Review searches can be quite extensive and retrieve a large numbers of results, and an important aspect of systematic searching is how to limit the number of irrelevant results that will need to be screened. Librarians are experts trained in literature searching and systematic review methodology, and partnering with a librarian can save you time and improve the quality of your review.
There is almost always a trade-off between comprehensiveness and relevance when searching. For example, many systematic reviews are very extensive because the goal is to find all relevant studies on a topic. In order to find all these studies, the range of the search is increased but this also means that more non-relevant articles will be retrieved.
When conducting a search according to literature review methods, keep the following in mind:
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