Revisiting the Stanford prison experiment, again: Examining demand characteristics in the guard orientation

The day before the Stanford prison experiment began, the investigators held an orientation session for the guards in which they communicated expectations for hostile guard behavior, a flippant prisoner mindset, and the possibility of ending the study prematurely. While the study's principal investigator has minimized the influence of this orientation, critics have speculated that it provided a "script" for guard abuse. In the present studies, participants were presented with a hypothetical prison simulation study and randomly assigned as guards to an orientation session that included these expectations (Stanford orientation) or one providing basic study information. Across three studies, participants exposed to the Stanford orientation relative to a control orientation, reported greater expectations for hostile and oppressive behavior on the part of the study's investigator and from others and themselves as guards. The present results provide empirical support for speculation that the language of the guard orientation in the Stanford prison experiment sanctioned abuse among guards.