1. why do prison guards behave brutally – is it personality or is it the social role. Prison in Stanford University basement
2. Participants were students who volunteered and were deemed "emotionally stable".
3. Role of guard and prisoner was randomly assigned. Prisoners were arrested in their homes, assigned a uniform, referred to by a number and followed strict rules. Guards had uniform including mirrored sunglasses and club and had control over the prisoners
4. Zimbardo played prison superintendent.