PSYC 2400 Chapter 4: Psych Chapter 4.doc

• School: Carleton University
• Department: Psychology
• Course: PSYC 2400
• Professor: Jenelle Power

Document Summary

The polygraph technique responses breathing fingertips response: physiological measures have long been used in attempt to detect deception, the origins of modern polygraphy date from 1917 when william marston, a. In a forensic context, a polygraph is used to measure a persons physiological responses to questions asked by an examiner. If the suspect fails the polygraph, that person may be pressured to confess, giving the police incriminating evidence: police may ask alleged victims of crimes to take a polygraph test to help verify whether a crime has occurred. Canadian security service (csis) also requires that its potential employees take a polygraph test to assess the candidates reliability and loyalty . Types of polygraph tests: the polygraph does not detect lies per se, since the physiological states associated with lying share much in common with many other states, including anxiety, anger, embarrassment and fear.