21 participants since 3 dropped out, all male student volunteers.
Randomly assigned the role of a prison guard or prisoner, given uniforms for each, had to conform to their roles.
Prisoners wore a loose smock and a cap, identified by numbers.
Guards wore a smart uniform to reflect status, hand cuffs, wooden club and shades.
Conformity to social roles - Stanford prison experiment-
Zimbardo et al (1973)
Encouraged to feel their role, so prisoners could apply for parol and guards had complete control.
2-days in there was rebellions by tearing uniforms and shouting/swearing.
‘Divide-and-rule’ tactics were used with head counts, so they knew who was in charge.
Prisoners became depressed and anxious, some showing significant psychological distress (2 released on day 4), hunger strikes.
Guard started being aggressive and violent, enjoying the power over the prisoners.
Ended after 6 days, instead of the intended 14.
Conformity to social roles- Zimbardo 1973-
CPS- McDermott (2019) behaved as if the prison was real – 90% of prisoners talked about prison life, some believed it was an undercover prison.
CPW- Lacked realism of a real prison – Banuazizi and Movahedi (1975) argued that they were just conforming to the role since their performance was based on stereotypes (films they watched).
Conformity to social roles- Zimbardo 1973-
CPS- Conforming to the role they were given was seen as ‘natural/easy’.
CPW- Reicher and Haslam (2006) says it doesn’t account for the non-brutal guards who weren’t conforming to their social role.
Conformity to social roles- Zimbardo 1973-
S- Internal validity since Zimbardo was in control of key variables – all emotionally-stable.
W- Fromm (1973) exaggerated social roles, 1/3 guards acted brutal, 1/3 were fair, 1/3 were trying to help the prisoners- Zimbardo overestimated their conformity to social roles due to the pity some guards took.