PSYC 2400 Lecture Notes - Lecture 3: Polygraph, Ground Truth, Cerebral Circulation
27 Oct 2016
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William marston 1917 developed systolic blood pressure test and attempted to use physiological response to prove someone"s innocence (evidence). It was rejected (his testimony) in frye v, united states 1923 as they felt it didn"t gain acceptance by the scientific community. Polygraph records a person"s autonomic (arousal) nervous system response. It measures breathing, sweating, and blood pressure: applications of the test. If a suspect fails the polygraph test after being asked by the police to complete the test, then they may be pressured to confess, which gives the police incriminating evidence. Polygraph disclosure tests: used to uncover information about an offender"s past behaviour. Polygraph tests have been used to determine whether the offender is violating the conditions of probation or to test for evidence of risky behaviour, like sexual fantasies about children (in cases of sex offenders) Employee polygraph protection act of 1988: restricted private companies from using the polygraph.
