Published tests, or commercial tests, are standardized tests that are generally only available for purchase. Often these tests are expensive, consist of multiple parts, and must be purchased directly from the publisher, sometimes in specified quantities. Most often commercial tests must be used according to specific restrictions and cited according to the specifications of the owning company or author.
Unpublished tests (non-commercial) are often found reproduced in journal articles, books, or dissertations. Unless permission is overtly stated, to use an unpublished test, it is best to contact the author or the publisher of the publication that includes the instrument.
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