PSY 3173 Lecture Notes - Lecture 4: Electrodermal Activity, Autonomic Nervous System, Likey
17 Jul 2014
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Polygraph technique: polygraph: device for recording autonomic nervous system responses, relies on principle that deception is associated with physiological change (to questions asked) Parts: electrodes used for sweat (galvanic skin response, blood pressure cuff: measures heart rate, 12 week training program provided by canadian police college restricted to police officers. Canada: criminal investigations to resolve a case, failing may pressure confession, victims may take test for verification, polygraph disclosure test: uncover info about offender"s past behaviour, whether offender is violating probation or evidence of risky behaviour. Us: employees (theft, drugs) to weed out those with criminal tendencies or drug abusers, employee polygraph protect act: restricted polygraph use on employees, now specific to investigations for job related wrong doing, used as screening tool (police departments) Comparison question test: common, includes pretest interview, followed by questions where responses are measured, pretest interview, control questions: learns background, convice suspect of accuracy of polygraph.
