September 2018
Intermediate to advanced
392 pages
10h 16m
English
Figure 6.6
If you found one or more relevant meta-analyses, you may already have sufficient scientific evidence to answer your question. Unfortunately, for many topics, meta-analyses or systematic reviews are not available. In that case, your search will not yield any (or only irrelevant) articles, and you will have to look for high-quality primary studies – that is controlled and/or longitudinal studies (see Chapter 5). To find high-quality single studies, first, enlarge the pie: Conduct a search with your (pretested) search terms and combine the outcome with OR. This search query is probably ...
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