The results of Zimbardos experiment shocked the audience and showed significant importance to the new way of thinking about human nature.

Authors Avatar

Erika Pärn IB07

Zimbardo, Haney, Craig., Banks, Curtis.                        

Stanford Prison experiment

1973

Aim: The aim of the study was to investigate the effects of being assigned to the role of either a prison guard or prisoner.

Procedure: The independent variable being the conditions the participants are randomly allocated to (prisoner or guard).  The dependent variable is the resulting behaviour.

The participants were respondents to a newspaper advertisement, which asked for male volunteers to participate in a psychological study of ‘prison life’

The 75 respondents completed a questionnaire about their family background, physical and mental health, prior experiences and attitudinal tendencies with respect to psychopathology and any involvement in crime.

Based on the results of the tests 24 men were selected. The participants were described as “normal, healthy male college students who were predominantly middle class and white.” The 24 participants did not know each other prior to the study.

A simulated prison was built in the basement of the psychology building at Stanford University. The uniforms of both prisoners and guards were intended to increase group identity and reduce individuality within the two groups.

Participants were told that the ‘experimenters wanted to try to simulate a prison environment within the limits imposed by ethical considerations’.  Their assigned task as prison guards was to ‘maintain the reasonable degree of order within the prison necessary for effective functioning’.

Join now!

Results: The behaviour of the ‘normal’ students who had been randomly allocated to each condition, was affected by the role they had been assigned, to the extent that they seemed to believe in their allocated positions.  The study therefore rejects the dispositional hypothesis.

The experiment had to be stopped after just six days instead of the planned 14 days. Five prisoners had to be released even earlier because of extreme emotional depression.

Interactions of guards were in the form of commands or verbal affronts, while the prisoners adopted a generally passive response mode. The experimenters would not permit ...

This is a preview of the whole essay