Stanford Prison Experiment - Goals and Methods

Goals and Methods

Zimbardo and his team aimed to test the hypothesis that the inherent personality traits of prisoners and guards are the chief cause of abusive behavior in prison. Participants were recruited and told they would participate in a two-week prison simulation. Out of 70 respondents, Zimbardo and his team selected the 24 males whom they deemed to be the most psychologically stable and healthy. These participants were predominantly white and middle-class. The group was intentionally selected to exclude those with criminal background, psychological impairments or medical problems. They all agreed to participate in a 7 to 14 day period and received $15 per day (roughly equivalent to $85 in 2011).

The experiment was conducted in the basement of Jordan Hall (Stanford's psychology building). Twelve of the 24 participants were assigned the role of prisoner (9 plus 3 alternates), while the other twelve were assigned the role of guard (also 9 plus 3 alternates). Zimbardo took on the role of the superintendent, and an undergraduate research assistant the role of the warden. Zimbardo designed the experiment in order to induce disorientation, depersonalisation and deindividualisation in the participants.

The researchers held an orientation session for guards the day before the experiment, during which they instructed them not to physically harm the prisoners. In the footage of the study, Zimbardo can be seen talking to the guards: "You can create in the prisoners feelings of boredom, a sense of fear to some degree, you can create a notion of arbitrariness that their life is totally controlled by us, by the system, you, me, and they'll have no privacy... We're going to take away their individuality in various ways. In general what all this leads to is a sense of powerlessness. That is, in this situation we'll have all the power and they'll have none."

The researchers provided the guards with wooden batons in order to establish their status, clothing similar to that of an actual prison guard (khaki shirt and pants from a local military surplus store), and mirrored sunglasses to prevent eye contact. Prisoners wore uncomfortable ill-fitting smocks and stocking caps, as well as a chain around one ankle. Guards were instructed to call prisoners by their assigned numbers, sewn on their uniforms, instead of by name.

The prisoners were arrested at their homes and charged with armed robbery. The local Palo Alto police department assisted Zimbardo with the arrests and conducted full booking procedures on the prisoners, which included fingerprinting and taking mug shots. They were transported to the mock prison from the police station, where they were strip searched and given their new identities.

The small mock prison cells were set up to hold three prisoners each. There was a small space for the prison yard, solitary confinement, and a bigger room across from the prisoners for the guards and warden. The prisoners were to stay in their cells all day and night until the end of the study. The guards worked in teams of three for eight-hour shifts. The guards did not have to stay on site after their shift.

Read more about this topic:  Stanford Prison Experiment

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