In CINAHL, what are Research Instruments?
http://support.epnet.com/knowledge_base/detail.php?id=3099
The text below copied from Ebsco.
"Research Instruments are measurement tools (for example, questionnaires or scales) designed to obtain data on a topic of interest from research subjects. Research instrument records are researched and created by CINAHL staff and these provide information about the research instrument, including information such as the purpose of the instrument, the population addressed, the variables measured, and more. CINAHL Plus includes research instrument records, research instrument validation records, and research instrument utilization records. CINAHL includes just research instrument records.
Research Instrument Records - provide details on validation and utilization of research instruments. The records indicate which studies have used a specific research instrument and include the purpose/variable measured, sample population, methodology, other instruments, items and questions, where the original study was mentioned and how to obtain the actual research instrument.
Research Instrument Validation and Utilization Records - provide details on the validation and utilization studies of each instrument. They include the purpose/variable measured, sample population, methodology, other instruments, items and questions and the source for the instrument."
A consise and helpful pdf on this topic is Finding Research Instruments and Questionnaires in CINAHL by Duke University.