Here are some search terms you will want to try when starting your search:

   Scale(s)
   Survey(s)
   Test(s)
   Measure(s)
   Measurement(s)
   Instrument(s)
   Questionnaire(s)
   Inventory or Inventories
   Rating scale
   Psychometrics
   Assessment
   Validity
   Statistical

It is important to check the thesaurus or index of the database you are searching to see what terms they use for tests and measurements.