Unwilling but not unable to control: Ego depletion increases effortful dishonesty with material rewards

Previous studies have found that ego depletion increases dishonesty. However, it remains unclear whether ego depletion makes participants unable to exert self-control or unwilling to exert self-control when it increases dishonesty. The present study aimed to clarify this. Based on the process model, ego depletion causes individuals to pay more attention to material rewards and increases the motivation to act on impulse. Therefore, it is possible that ego-depleted participants are unwilling, rather than unable, to be honest. We conducted two experiments to examine this hypothesis. Results showed that ego depletion increased material-based dishonesty even when the dishonest behavior was more complicated and effortful than was the honest behavior. However, participants were reluctant to cheat just for convenience, and ego depletion had no apparent effect on convenience-based dishonesty without any material rewards. The theoretical implications and future directions of these results are discussed.