Title: Detecting Deception From the Body and Face

Author: Paul Ekman and Wallace V. Friesen
Publisher: Journal of Personality and Social Psychology
Published: 1974

The experiment was designed to test two hypotheses concerning differences between the face and body when a person is engaged in deception. Subjects were required to be honest in one interview, frankly describing their feelings about a pleasant film, and to be deceptive in another interview, concealing negative affect aroused by an unpleasant film and simulating pleasant feelings.  As predicted by the first hypothesis, the face was mentioned more often than the body when the subjects were asked afterward what behavior should be censored or controlled in perpetrating deception. Videotapes of the facial and body behavior during the honest and deceptive interviews were shown to separate groups of observers. The second hypothesis-that when deceptive behavior was judged, more accurate judgments would be made from the body than from the face, but that when honest behavior was judged, there would be little difference in the accuracy achieved from the face or body-was partially supported.

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