The Library at the University of British Columbia has a series of videos on how to search for tests and measures in CINAHL, Medline and PsycINFO

The University of North Carolina Health Sciences Library also has search tips for specific databases.

Duke University Medical Center Library & Archives has a list of Duke tests and a step by step guide on searching CINAHL for research instruments and questionnaires plus more.

University of Vermont Libraries has Research Instruments: Surveys, Questionnaires, and other Measurement Tools: Descriptions and Search Tips