Zimbardo’s Prison Experiment

In this famously notorious experiment college students volunteered to take on the role of either prison guards or prisoners and spend time in an artificial prison. The Stanford Prison Experiment was meant to last 14 days, it had to be stopped after just six because the ‘guards’ became abusive and the ‘prisoners’ began to show signs of extreme stress and anxiety.

In 1971, psychologist Philip Zimbardo and his colleagues set out to create an experiment that looked at the impact of becoming a prisoner or prison guard. The researchers set up a mock prison in the basement of Standford University’s psychology building, and then selected 24 undergraduate students to play the roles of both prisoners and guards.

The simulated prison included three six by nine foot prison cells. Each cell held three prisoners and included three cots. Other rooms across from the cells were utilized for the prison guards and warden. One very small space was designated as the solitary confinement room, and yet another small room served as the prison yard.

The 24 volunteers were then randomly assigned to either the prisoner group or the guard group. Prisoners were to remain in the mock prison 24-hours a day for the duration of the study. Guards, on the other hand, were assigned to work in three-man teams for eight-hour shifts. After each shift, guards were allowed to return to their homes until their next shift. Researchers were able to observe the behavior of the prisoners and guards using hidden cameras and microphones.

While the prisoners and guards were allowed to interact in any way they wanted, the interactions were generally hostile or even dehumanizing. The guards began to behave in ways that were aggressive and abusive toward the prisoners, while the prisoners became passive and depressed. Five of the prisoners began to experience such severe negative emotions, including crying and acute anxiety, that they had to be released from the study early.

The Stanford Prison Experiment demonstrates the powerful role that the situation can play in human behaviour. Because the guards were placed in a position of power, they began to behave in ways they would not normally act in their everyday lives or in other situations. The prisoners, placed in a situation where they had no real control, became passive and depressed.

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