An infamous 1971 psychological study at Standford is subject of the new indie film The Stanford Prison Experiment.

The original experiment involved splitting a group of male students into two groups - prisoners and inmates - before entering them into a makeshift prison. Over the course of only six days, the 'prison guards' began abusing their power and subjecting the 'inmates' to sadistic abuse.

The study has become the subject of two other feature films and a BBC reality series. Endorsed by Sundance critics, The Stanford Prison Experiment promises to be the most realistic portrayal of the legendary study yet.

The film stars Billy Crudup as the study's designer, Philip Zimbardo, and Ezra Miller and Tye Sheridan as two of the prisoners. The Stanford Prison Experiment opens July 17 in the US.

Cover image: YouTube