Zimbardo selects who has which role via a random selection process, which in this case was the coin toss
Day 3
I don't like it here...
Guards were allowed to make the rules, but before that, the prisoners were forced to strip and change into overalls that barely covered them
Day 5
By the second day there were already rebellions, the prisoners refused to leave their cells, as a punishment, ring leaders were punished by being thrown into solitary confinement.
Day 6 - last day
By day 3 prison guards got more brutal and stopped prisoners from leaving their cells, one prisoner showed extreme signs of anxiety.
No one's allowed to leave!
On day 5, prisoners were forced to clean the toilets with their bare hands, and at night sexually humiliated them.
It stinks in here!
It smells like you, 012...
By day 6, the guards' power was absolute and they had full control over the prisoners, it was here that Christina Maslach objected against the experiment and it stopped on day 6.