A machine with 30 switches, with 'shock' labels starting at 'slight shock' at 15 volts to 'intense shock' at 225 volts and finally 'XXX' at 450 volts, a potentially fatal shock
14 displayed nervous laughter, but explained after that they were not sadistic and that their laughter had not meant that they were enjoying shocking the learner
Elements that contributed to high levels of obedience
The location of the study at a prestigious university provided authority
Participants assumed that the experimenter knew what he was doing and had a worthy purpose, so they should be followed
The participant didn't wish to disrupt the study because he felt under obligation to the experimenter due to his voluntary consent to take part
It was a novel situation for the participant, who therefore didn't know how to behave. If it had been possible to discuss the situation with others the participant might have behaved differently
The participant had very little time to resolve the conflict at 300 volts, and he didn't know that the victim would remain silent for the rest of the experiment
The participant assumed that the discomfort caused was minimal and temporary and that the scientific gains were important
The conflict was between two deeply ingrained tendencies – not to harm someone, and to obey those whom we perceive to be legitimate authorities
Milgram (1974) reported that 75% of the participants strongly believed they were given electric shocks, 22.6% had some doubts and only 2.4% were certain that the shocks were not real
Subjects weren't protected from harm as the majority of participants were subjected to distress and, in some cases, participants suffered from seizures