The study was carried out in an artificial environment with some experimental controls, however, would be difficult to replicate.
McDermott (2019) suggested the study did replicate the social roles of prisoners and guards. One 'prisoner 416' later said he believed the prison to be real.
Reicher and Haslam (2006) replicated Zimbardo’s research by randomly assigning 15 men to the role of prisoner or guard. In this replication, the participants did not conform to their social roles.
