De-individuation is a psychological state characterized by a diminished sense of self-awareness and personal responsibility, often occurring in group settings. This phenomenon can lead individuals to engage in behaviors they might typically avoid when alone, such as aggression or antisocial acts, due to anonymity and the diffusion of responsibility. Factors like group size, anonymity, and arousal can contribute to de-individuation, making people feel less accountable for their actions. As a result, individuals may lose their sense of identity and moral constraints within the group context.