Second social psychological explanation of aggression: deindividuation.

1. If you could be totally invisible for 24 hours and you were completely assured that you would not be detected or held responsible for your actions, what would you do?

2. The average number of anti-social responses was 36% The same number of anti-social responses given by prisoners in a maximum security prison. Dodd (1985)

3. Deindividuation refers to the loss of a sense of personal identity that can occur when we are, for example, in a crowd or wearing a mask. Deindividuation

5. Hogg and Vaughan (2008) define deindividuation as: ‘a process whereby people lose their sense of socialised identity and engage in unsocialised, often antisocial behaviours’.

10. "Creates a unique psychological state in which behaviour comes under the control of immediate situational demands and biological, hormonal urges. With inner restraints suspended behaviour is totally under external situational control; outer dominates inner" - Zimbardo Deindividuation

12. Lord of the Flies

19. Stanford Prison Study

23. Man Goes on Rampage