The group that had access only to the audio portion of the interview had a 55 percent success rate. That means verbal behavior (what the suspect said and the tone in which he delivered the information) was only 55 percent accurate in determining whether a suspect was lying or telling the truth. The group who couldn’t hear the audio and had only the suspect’s body language on video did better—they were accurate 65 percent of the time. Those who had the advantage of hearing and seeing the suspect had an 85 percent success rate, while those who had the background (case file) along with the video
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