40 American men aged 20-50 volunteered.
Study advertised as investigating 'punishment on learning'.
Participants met an experimenter in a lab coat.
Fixed draw assigned roles: teacher (naive participant) and learner (confederate).
Teacher administered electric shocks for wrong answers.
Shock generator ranged from 15 to 450 volts.
Shocks were not actually administered.
Pre-recorded tapes of the learner were played.
Experimenter used standardized prods if the participant hesitated.
Participants were debriefed after the experiment.