ScHARR Introduction to Systematic Reviews 5 ScHARR Introduction to systematic reviews 5.
Subject experts are often surprised by the large quantity of material in a specific topic area.
It is not unusual, therefore, for you to have to revise your entry criteria in the light of initial results. Certain approaches are more legitimate than others. Such explicit and systematic criteria are preferable to arbitrary decisions about the number of sources searched, the number of articles retrieved or the thoroughness of a search strategy. Less commonly retrieval might yield fewer items than expected. However, a rigorous review of a few high-quality studies is considered preferable to a less discriminate trawl for items of questionable worth.