Event-related potentials (ERPs) were used to explore the influence of ego depletion on spontaneous deception under time pressure. The Stroop Color-Word test was used to manipulate the participants' ego depletion in the experiment. A visual perception task was employed to assess the participants' deceptive tendency. The results indicated that the ego-depleted group was more prone to engaging deception and induced a larger P3 amplitude than did the nondepleted group. The no-time pressure group was more likely to deceive and induced a larger P3 amplitude than did the high-time pressure group. These results suggest that individuals with sufficient resources for self-control are more likely to resist temptation and less likely to engage in self-serving deception. Higher time pressure made subjects more likely to cheat. Deception is automatic and spontaneous under certain conditions. Ego depletion and high time pressure promote the occurrence of deception.
Keywords: P3 amplitude; deception; ego depletion; time pressure.
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