What was the procedure(Haney)?
Pnts were randomly allocated to the role of the "guard" or the "prisoner"
A mock prison was created in the basement of the psych building at Stanford University
"Prisoners" remained in the prison for 24 hours every day
"Guards" worked 3-man 8 hour shifts
The assigned task was to "maintain the reasonable degree of order within the prison necessary for its effective functioning"