Lying is sometimes more difficult than telling the truth because it requires more cognitive resources or "cognitive load." Implementing high cognitive load has been suggested to help facilitate the observation of deceptive behavior. Research suggests that people can correctly judge when individuals are lying only about 50% of the time when observing their nonverbal behavior. Individuals tend to restrict movements in their legs and feet when they are lying, perhaps in an effort to avoid giving off any nonverbal cues that might be interpreted as possible guilt. In the current study, it was hypothesized that participants would have significantly less movement in their legs and feet when lying than when telling the truth, as measured by total duration of time. Fifty-five participants were recruited from the University of California, Irvine and The Chicago School of Professional Psychology at Irvine. Participants were asked to respond to a total of 4 questions, in which 2 of their responses were truths and 2 were lies. They simultaneously played a game on a computer with the intent to increase cognitive load and decrease available cognitive resources to create a believable lie. Analyses of data were conducted using repeated-measures ANOVA. The results revealed some significant differences in the amount of time participants moved their lower body, but for only 1 of the lie questions. The results of the study support the idea that more research is needed to determine how to detect deception via nonverbal behavior more accurately, especially when implementing high cognitive load.
|School:||The Chicago School of Professional Psychology|
|Department:||Clinical Forensic Psychology|
|School Location:||United States -- Illinois|
|Source:||DAI-B 76/07(E), Dissertation Abstracts International|
|Subjects:||Behavioral psychology, Criminology|
|Keywords:||Body language, Cognitive load, Dual-task performance, Lie detection, Lying, Nonverbal behavior|
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