limitation is that the findings are unreliable. Reicher and Haslam carried out a simulation study. They found that the participants did not all conform to social roles. Guards were uncomfortable with their power and did not demonstrate the authority expected. Prisonersrebelled from an early stage demonstrating a lack of conformity. This shows that this process is not automatic as Zimbardo thought. Instead, people only conform to their social roles if they identify with the group in which they have been placed. This is a limitation because it lowers the reliability of the findings.
limitation - concerns ethics. Whilst the participants gave consent in that they knew they were signing up to role play they did not appreciate how this situation would make them feel. They also did not know that certain events would happen like the real police coming to arrest them at the start of the study. No protection from harm, he assumed the role of prison superintendent. Ended early, should have been terminated as signs of psychological distress were shown. limitation because Zimbardo had a duty of care to look after his participants and it would appear that he did not do this.
strength-study was well controlled. Zimbardo selected participants from his sample that were 'stable' meaning he was able to control for individual differences regarding personality posing as an extraneous variable in this study. Zimbardo randomly assigned participants to their social roles. Zimbardo had not biasedly placed those with a more confident personality as the role of the guard to suit the hypothesis of this study. Strength-this level of control increases internal validity of the study, can be confident that findings influenced by the roles rather than individual differences.
Strength-helpful in explaining cases of ordinary people committing atrocious acts. 2003Abu Ghraib, the pictures show the soldiers threatening prisoners with dogs and degrading them by forcing them to strip naked and assume sexual positions. One photo shows a dead prisoner with an American solider smiling with her thumbs up. Zimbardo explains this behaviour in terms of the situation the soldiers had been placed in. He believed that they were conforming to the role they had been given. This is a strength because his findings have been useful in explaining such events within society.