Guards were instructed to call prisoners by their assigned numbers, sewn on their uniforms, instead of by name.
The prisoners were "arrested" at their homes and "charged" with armed robbery.
as an investigation into the causes of difficulties between guards and prisoners in the United States Navy and United States Marine Corps.
The experiment is a topic covered in most introductory psychology textbooks.
The experiment was conducted in the basement of Jordan Hall (Stanford's psychology building).