A primary research study was conducted on the focus topic
Longer in length (10-15 pages, average)
Include many references
The methodology will discuss participants, how participants were studied, the type of measurement used to study participants (survey, interview, physical exam, tests, etc...) and also outline ethics approval.
The most common type of research is found because it doesn't take as much time to produce higher levels of evidence
These are the original research studies. The databases below have search methods for retrieving the high-quality studies that can be used for clinical practice.
It is possible with these federated search engines to search across many resources, with the retrieval sorted according to the source of the evidence. Haynes (2006) cautions, however, that "the quality of the retrieval depends on the source, and many sources do not provide critical appraisal of evidence."