According to Zimbardo's report, one third of the guards were judged to have exhibited "genuine sadistic tendencies", while many prisoners were emotionally traumatized, and three of them had to be removed from the experiment early.
三分之一的看守被评价为显示出“真正的”虐待狂倾向，而许多囚犯在情感上受到创伤，有2人不得不提前退出实验。