PSY 0182 Lecture Notes - Lecture 7: Paul Ekman, Polygraph, Cognitive Load
Document Summary
Note: there is no standard of evidence to make someone a suspect. A bad position to be in for an innocent. Following a crime, police look for suspects. The standard for suspects can be low: someone who fits a general profile, someone who the police believe is lying. Police often assess a suspects verbal and non-verbal. Liars and truth tellers describe an event. Observers decide whether person is lying: 50% chance 50% accuracy. Few diagnostic cues: must consider totality of circumstance. Erroneous implicit beliefs: do not consider diagnostic cues. Baseline attitude helps us detect lies but we often do not have this info available. Secret service agents: 80% correct they focus on. Non-verbal cues and nuances of word usages these individuals also tend to make fairly quick decisions on deception. Paul ekman: microexpressions: the cognitive load approach, voice/speech cues. Length/detail of story: ability to recall details. Control question test: utilizes bogus pipeline, control and relevant questions.
