Philip G. Zimbardo, the psychologist behind the controversial “Stanford Prison Experiment” that was intended to examine the psychological experiences of imprisonment, has died. He was 91.

Philip G Zimbardo, the psychologist behind the controversial Stanford Prison Experiment which was intended to examine the psychological experiences of imprisonment, has died at the age of 91. Stanford University announced that he died on October 14 at his home in San Francisco. A cause of death was not provided.

FAMED PSYCHOLOGIST PHILIP Zimbardo, known for his controversial Stanford Prison Experiment, has died at the age of 91. Zimbardo passed away earlier this week in his home in San Francisco. Zimbardo conducted the Stanford Prison Experiment over six days in August,