T. Carnahan and S. McFarland, “Revisiting the Stanford Prison Experiment: Could Participant Self-Selection Have Led to the Cruelty?” PSPB 33 (2007): 603; S. H. Lovibond et al., “Effects of Three Experimental Prison Environments on the Behavior of Non-convict Volunteer Subjects,” Psychologist 14 (1979): 273.
