Facts about the Stanford Prison Experiment
- 08
The mock prison's basement location at Stanford lacked windows and natural light, creating an oppressive environment that intensified the psychological effects on both guards and prisoners.
- 07
Former prisoner Clay Ramussen was released after thirty-six hours when he experienced an acute emotional breakdown, becoming one of the first participants to leave the study early.
- 06
A controversial 2018 reassessment by researcher Thibault Le Texier found that guards received explicit instructions from Zimbardo to act oppressively, contradicting the original claim that abusive behavior emerged spontaneously.
- 05
Zimbardo himself role-played as the prison superintendent during the Stanford Prison Experiment, blurring the line between researcher and participant in the study's design.
- 04
Twenty-four Stanford undergraduates were randomly assigned to play either guards or prisoners in Zimbardo's 1971 experiment, with guards earning fifteen dollars daily.
- 03
Participant Douglas Haney went on a hunger strike during the Stanford Prison Experiment to protest the conditions, forcing guards to threaten him with solitary confinement.
- 02
Guards in Zimbardo's 1971 study created a mock prison at Stanford University's psychology building basement using a converted hallway as the jail block.
- 01
In 1971, Philip Zimbardo's Stanford Prison Experiment lasted only six days instead of the planned two weeks due to psychological harm observed in participants.