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by Anonymous on December 4th, 2004

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If a polygraph test measures stress response, would taking drugs or other relaxants change the results?

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  • by Jeremiah Britt on December 6th, 2004

    Jeremiah Britt

    Anti-depressant medication (i.e., Lithium, Prozac) are known to have effects, and any drug that effects mood or psychological arousal is certain to alter results. However, these drugs do not, in themselves, allow someone to beat the test, as all results in prescreening would also be skewed and would tip off a good polygraph administrator.
    For the record, however, there is good reason why the tests are not generally allowed as evidence in a court case: it is an unreliable measure of honesty and only measures stress. Someone afraid of the test tker would get false positives and any particularly stoic person could easily pass.

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