In Stanley Milgram’s obedience experiments, subject were least likely to deliver maximum levels of shock when the subjects observed other subjects who refused to obey the experimenter's orders.
This was a scientific experiment that was conducted by this man. What he required was for a person to deliver electric shocks to another person.
He would require a person to deliver high voltage electric shocks to a person. The person receiving the shocks would scream and eventually get silent.
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