PSY344H5 Chapter 4: Chapter 4- Deception -2
Document Summary
William marston: psychologist and lawyer who developed systolic blood pressure test as evidence for innocence. Polygraph training provided by canadian police college in canada. Employee polygraph protection act of 1998 restricted private companies from using polygraph to weed out those with criminal tendencies. Limited use to job related investigations of wrongdoing. Only canadian security intelligence service (csis) and some police departments can require polygraph. Polygraph discourse tests: polygraph tests used to uncover info about offenders past behaviour. Polygraph doesn"t detect lying, it shows how some questions elicit a larger physiological response in guilty people than innocent ones: since many physiological states linked to lying common to other emotional states (fear, anxiety, anger) 2 types of polygraph tests: comparison question test (cqt): includes irrelevant questions that are unrelated to crime, relevant questions concerning crime being investigated, and comparison questions concerning persons honesty and past history prior to event being investigated.
