Deindividuation is a process whereby people lose their sense of socialised individual identity and engage in unsocialised, often antisocial behaviour.
Being part of a crowd can diminish awareness of individuality. This is because in a large crowd the individual feels anonymous and does not therefore feel a sense of responsibility. Responsibility is shared by the group, and therefore we experience less personal guilt at harmful aggression directed at others.
Dunn and Rogers claim that it is not just anonymity that causes deindividuation but the consequences of anonymity. This can be explained by two different types of self-awareness:
Private Self-awareness - attention to own feelings and behaviour, reduced in crowds
Public self-awareness - care about what others think, reduced in crowds.
229 undergraduate psychology students were asked 'if you could do anything, no repercussions, what would you do?' responses were anonymous.36% said some form of antisocial behaviour, 26% said they'd commit a crime. Only 9% were prosocial responses
However, study lacks mundane realism, not psychologically naive etc
Looked at levels of aggression in online chatrooms. They found a strong correlation between making threatening comments whilst remaining anonymous. The most aggressive comments were sent by those who did not reveal their identity
Demonstrated that not all deindividuation leads to aggression. Their 'deviance in the dark' study showed that strangers who were in the dark with no rules (deindividuated) did not act aggressively towards one another. Instead they behaved more intimately (touching and kissing each other)