PSYC 2400 Lecture Notes - Lecture 7: Electrodermal Activity, Plethysmograph, Al-Qaeda
29 Jan 2013
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People lie (hancock et al. , 2004a: 14% e-mails, 21% instant message, 27% of face-to-face, 37% of phone calls. Twice a day on average (depaulo et al. , 1996) People are better at knowing when people are being truthful than when they are being deceptive. When there are high stakes, people lie better. Nature of deception: cognitive, have to make up story. Accumulated research literature suggests that people are not good at detecting deception. The average person is accurate roughly 54% of the time when 50% would be expected by chance. Cognitive element kicks in aware of arousal. Control all perceived behavioural cues: verbal, posture. Time-reduced remnants of interrupted or inhibited facial muscular movements. Rigidity can emerge (e. g. , twyman, elkins, burgoon, 2011) Honest comfortable, open, and forward leaning posture. Can use movements to conceal other channels which can give people away. Deception cues: cues suggesting individual is trying to deceive you (e. g. , finger tapping).
