Milgram advertised ppts in New Haven newspaper asking for people with an 'experiment on learning and memory'
Ppts arrived at Yale and met Mr Wallace who they thought was another volunteer (actually a confederate) and a experimenter (not Milgram)
Drew lots to identify who would be leaner and teacher in it - this was rigged and Mr Wallace was always the learner
Taken into the room for Mr Wallace, told about the electric shocks, ppts given sample mild shock