Part 1 of Essay
We often give nonverbal cues as to whether or not we are trying to deceive someone. These nonverbal actions are involuntary. Subjects were asked three questions provided with no reason to lie. They were then asked three questions they were asked to lie about. Nonverbal cues were measured both, during the truthful answers, ....

Part 2 of Essay
.... another person is lying. Fortunately the findings of a large body of research on nonverbal communication can prove very useful in this respect. (DePaulo, Epstein, & Wyer, 1993) showed that is virtually impossible to find anyone who can control or manage the many different channels of nonverbal communication. For this reason even persons who lie frequently and are highly practiced at this task, often reveal the fact that they are lying through some channel of nonverbal cues. Some of the deception detectors ar ....