The first step is looking to see if a measure exists on a given topic. Name and descriptions of measures can be found in many sources.
Locate Unpublished Measures in:
Use Mental Measurements Yearbook to find reviews, reliability and validity data, and purchase information about Commercially Published psychological Instruments. MMY is available in Print (as a book series dating back to 1938) or as a Database.
Now that you have discovered that a Test exists on your topic and checked its Reliability and Validity data; It's time to see if we can obtain a copy of the Psychological Test.