Milgram (1963) recruited 40 paid male participants from a newspaper advertisement.
The experiment took place in Yale University. The participant was allocated the role of the teacher and a confederate given the role of the learner. The participant was told to test the learner through a memory test, and administer an electric shock every time the learner gave a wrong response.
The shocks ranged from 15-450 volts. 100% of participants went to 300 volts, and 65% of participants continued to the maximum shock level of 450 volts. These findings suggested significant obedience to authority.