People are more likely to copy the bad behavior of a person who doesn't cooperate in group activities (the bad apple effect) rather than someone who does cooperate. This tendency is stronger when the uncooperative person is from the same group rather than a different one. Surprisingly, people judged a bad apple more harshly if they were from a different group. However, when there's a risk of being excluded from the group, the influence of a bad apple can be reduced. In this case, the threat of being left out caused individuals to less likely follow the bad behavior of others.