Lie detection or polygraph testing relies on Autonomic
System arousal. For polygraph lie
detection, scientific validity rests on the strength of evidence supporting all
the inferential links between deception and the test results. It is appropriate
for making the discrimination between deception and truthfulness. Polygraph
practice is built on comparing physiological responses to questions that are
considered relevant to the investigation at hand, which evoke a lie from
someone who is being deceptive.
