CMN 122 Lecture 12: Lecture 12: Decepetion
Lecture 12: Deception
11/21/18
Definition of Deception
● DECEPTION: an act intended to foster in another, a belief that the deceiver considers
false
o must be some sort of intentionality to fool someone
Leakage Cues
● leakage cues: information that gives away the true information
o aka. micro expressions- quick emotional response that leaks through the facade
...More Terminology
● cue competition: when the words we are saying and our nonverbals do not match up
o EX. sarcasm
● detection apprehension: fear of being caught when telling your lie
The Othello Error
● occurs when a lie catcher fails to consider that a truthful person who is under stress may
appear to be lying; -- truthful people may be afraid of being disbelieved
o you are under stress and looking anxious or sweaty-- people may assume you are
this way because you are guilty, but in reality you are just stressed
Underlying Emotional Factors in Deception
● fear (detection apprehension)
● guilt (deception guilt)
o feel remorse for lying
● excitement (duping delight)
o get excited when we are getting away with the lie
● when lies fail it is usually due to either inadequate preparation or the interference of
emotions
o Emotions can make or break your ability to lie and get away with it
Theoretical Approaches to Detecting Deception (Segrin)
● attempted control
o rooted in the idea that when you are lying a convo is overly controlled and not
fluid like regular communication -- practiced what you say
● arousal
o good indicator of lying, but hard for humans to detect EX. pupil dilation
● affect
o looking for emotion in people (fear, guilt, excitement)
● cognitive load
o used by police officers-- really hard to keep a lie consistent, when the truth is
easier to remember and retell
Humans Are Poor Lie Detectors: Vrij (2000)
● reviewed 40 studies
● 67% accuracy rate for detecting truths
● 44% accuracy rate for detecting lies
● high accuracy for truth, low accuracy for lies = “truth bias”
Humans Are Poor Lie Detectors: Bond & DePaulo (2006)
● results from 206 reports and 24,483 judges
● people achieve an average of 54% correct lie and truth judgments
● correctly classifying 47% of lies as deceptive and 61% of truths as Nondeceptive
Humans Are Poor Lie Detectors: Bond & DePaulo (2008)
● reviewed 142 studies
● 19,801 judges of deception
● mean accuracy of 54.05% for lies
● mean of 55.50% accuracy for truth judgments
Humans Are Poor Lie Detectors: Conclusion
● people do not do much better than chance (flipping a coin) at detecting deception
● people typically report extremely high confidence in their detection ability-- confidence
is misplaced
How Good Are the Pros? Vrij (1994)
● students were interviewed twice by uniformed police officers
Document Summary
Deception: an act intended to foster in another, a belief that the deceiver considers false: must be some sort of intentionality to fool someone. Leakage cues leakage cues: information that gives away the true information: aka. micro expressions- quick emotional response that leaks through the facade. Cue competition: when the words we are saying and our nonverbals do not match up: ex. sarcasm. Detection apprehension: fear of being caught when telling your lie. Guilt (deception guilt: feel remorse for lying. Excitement (duping delight: get excited when we are getting away with the lie. When lies fail it is usually due to either inadequate preparation or the interference of emotions: emotions can make or break your ability to lie and get away with it. Attempted control: rooted in the idea that when you are lying a convo is overly controlled and not fluid like regular communication -- practiced what you say.
