In the stanford prison experiment, male college students volunteered to act either as guards or as prisoners. in only six days, the guards became cruel and degrading and the prisoners became passive, broke down, or rebelled, the psychologist who devised the study was

The psychologist who devised the study was "Philip Zombardo".

The well known Stanford prison experiment was an endeavor to research the mental or psychological impacts of apparent power, concentrating on the battle among prisoners and jail guards. Stanford University by an examination group headed by Philip Zimbardo who was a psychologist utilizing students from collage.