Group polarization refers to a tendency among group members, which strengthens and tends to be extreme through group interaction, so as to deviate from a certain rationality. There are usually two situations of group polarization: one is to make the result more risky or even radical, which is called risk shift; One is to make the results more conservative, called cautious shift.
According to the above definition, which of the following phenomenas does not involve group polarization??
Everyone kept silent about someone's bad behavior, which made him more arrogant