• An overemphasis on group cohesion is a significant threat to ethical group behavior. Be alert for the symptoms of groupthink. These include signs of overconfidence (illusion of invulnerability, belief in the inherent morality of the group), signs of closed-mindedness (collective rationalization, stereotypes of outside groups), and signs of group pressure (pressure on dissenters, self-censorship, illusion of unanimity, and self-appointed mind guards).