Mark Frank: Expression and Deception
Duration: 17 mins 3 secs
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About this item
| Description: | (No description) |
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| Created: | 2015-09-28 16:16 |
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| Collection: | Decepticon 2015 |
| Publisher: | University of Cambridge |
| Copyright: | Dr S. Van der Zee |
| Language: | eng (English) |
| Keywords: | Deception; |
| Abstract: | Scientists have examined the behaviors associated with lying through a variety of experimental situations, ranging from polite lies to lies told by actual criminals under interrogation. The behaviors that are manifested under these situations are typically those related to cognitive effort, memory recall, emotional reaction, or attempts to control these behaviors. This presentation will discuss the results of a study that examined facial clues to deception in a situation patterned after a high stake deception situation associated with terrorism, with participants incentivized by high stakes involving punishment and reward for not only themselves but for their rival groups, a choice whether to lie, and in a context in which professional interrogators asked them questions. The facial expressions of emotion were analyzed not only as a change in baseline, but also in terms of whether they were discrepant with other behavioral aspects of the account. An analysis 132 participants revealed that liars and truth tellers could be discriminated at 75% accuracy based solely on facial expression of negative emotion. Approximately 40% of these negative emotions were less than 500ms in duration. Moreover, when asked for their strategies to convince the interrogator of their truthfulness, truthful participants who admitted they attempted to conceal their facial expressions reduced their rate of negative emotion facial expressions, whereas deceptive participants showed the same rate of negative facial expressions regardless whether they admitted trying to conceal their expressions. Finally undergraduate judges actually were less accurate distinguishing liars from truth tellers in those participant clips that contained those negative emotion facial clues. These data suggest higher levels of lie detection from behavior than normally shown in the research literature, but that these clues are quick, manifest despite efforts to conceal them, and missed by most observers. |
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