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Note: I am not a psychologist. What do you mean by "some tests are copyrighted"? Are you talking about a statistical method being copyrighted, an implementation thereof, or something else entirely?

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He's refering to this (example):

https://en.wikipedia.org/wiki/Beck_Depression_Inventory#Limi...

The BDI is copyrighted, a fee must be paid for each copy used, and photocopying it is a violation of copyright.

Correct. A portion of the original study involved a personality measure like big five (http://en.wikipedia.org/wiki/Big_Five_personality_traits). The tests for this are almost all under copyright.

Probably something like the Rorschach tests being copyrighted until recently. The actual test questions and the scoring rubric that, applied to a subject, yield a number or set of numbers.

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