Tests and measures are often categorized as published or unpublished. Published tests are commercially available for purchase from a publisher and often may only be bought by a qualified or professionally credentialled user.
Unpublished or noncommercial tests are usually referred to in journal articles, dissertations, reports, etc.and are often made available for use by contacting the author.
See Access and Use Issues for a very good and detailed discussion on this topic by Miriam E. Joseph, Reference and Psychology Liaison Librarian at Saint Louis University.
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