1. 40 American male volunteers
2. Study took place at Yale university
3. Each volunteer introduced to another participant (confederate)
4. Drew lots to see who the Teacher was and who was the Learner
5. Volunteer was always the teacher
6. Experimenter was involved – also a confederate wearing a grey lab coat
7. The teacher would have to give an electric shock to the learner when they made a mistake on a memory recall test
8. Teacher could not see the learner but should hear him
9. Shocks increased with each mistake in 15-volts up to 450 volts