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. 2009 Mar;20(3):393-8.
doi: 10.1111/j.1467-9280.2009.02306.x. Epub 2009 Feb 23.

Contagion and differentiation in unethical behavior: the effect of one bad apple on the barrel

Francesca Gino  1 , Shahar Ayal, Dan Ariely
Affiliations

Contagion and differentiation in unethical behavior: the effect of one bad apple on the barrel

Francesca Gino et al. Psychol Sci. 2009 Mar.

Abstract

In a world where encounters with dishonesty are frequent, it is important to know if exposure to other people's unethical behavior can increase or decrease an individual's dishonesty. In Experiment 1, our confederate cheated ostentatiously by finishing a task impossibly quickly and leaving the room with the maximum reward. In line with social-norms theory, participants' level of unethical behavior increased when the confederate was an in-group member, but decreased when the confederate was an out-group member. In Experiment 2, our confederate instead asked a question about cheating, which merely strengthened the saliency of this possibility. This manipulation decreased the level of unethical behavior among the other group members. These results suggest that individuals' unethicality does not depend on the simple calculations of cost-benefit analysis, but rather depends on the social norms implied by the dishonesty of others and also on the saliency of dishonesty.

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