Finding research instruments can be time consuming. There are several possible places where you might find them. Some instruments may be freely available on the web. Others may be found in journal articles or dissertations (often as an appendix), which may or may not be available in the Library. Some are only available from the creator(s) of the research instrument. Some tests may only be purchased and/or restricted to qualified persons. As well as finding the instrument to use in your research, you also need to obtain permission in writing from the copyright holder.
For most databases, you can find articles describing and sometimes containing scales,questionnaires ,surveys and other research instruments with the following type of search strategy:
keyword or subject heading (such as coping) in the first search box
AND
test* or measure* or questionnaire* or scale* or survey* or assessment*
Where the asterisk (*) is a truncation symbol. For example, measure* will search measure, measures, measuring and measurement(s) all at once.
Below are other ways to find research instruments in specific databases:
Research in the Health Sciences - Faculty Guide by Centennial College Libraries is licensed under a CC-BY-NC-SA 4.0 license unless otherwise stated.
Survey Methodology by 
Methods for Testing and Evaluating Survey Questionnaires by 