Polygraph tests have been viewed as an invasion of privacy and criticized on ethical, legal, and scientific grounds. The physiological changes thought to reveal deception could result from anxiety about being interrogated, anger at being asked to take the test, or fear from pondering the consequences of "failing" the test. You might react in any of these ways if you were "hooked up" to a polygraph.Psychology, by Stephen F. Davis and Joseph J. Palladino

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