The aim of this guide is to help you locate unpublished tests and commercial tests and find information about the validity of tests.
Tests and measuring instruments are an important part of research and practice in the fields of psychology, education, health, and social work. They are used for diagnosing, researching, and assessing. They can be questionnaires, assessments, interviews, ratings, inventories, scales, measurements, surveys, measures, and tests. Instruments are either published or unpublished. They can be found in books, journal articles, and on the Internet.