When Accurate Beliefs Lead to Better Lie Detection¹

Abstract

This study tested the hypothesis that people with accurate beliefs about the cues that predict deception are better at detecting deception only when those beliefs are cognitively available and activated. To test the hypothesis, participants viewed video fragments of people who were being either honest or dishonest. A questionnaire assessed participants' beliefs about the cues involved in deception, and activation of participants' belief cues was accomplished by manipulating suspicion. The results provided support for the hypothesis, where participants whose beliefs were activated and had accurate beliefs were better at detecting deception compared to other participants. Gender differences were also found, where lies communicated by women were more accurately detected than were lies communicated by men.