the milgram experiment

A simple procedure is devised for studying obedience. A person comes to the laboratory and, in the context of a learning experiment, is told to give increasingly severe shocks to another person (who is actually an actor). The purpose of the experiment is to see how far a subject will proceed before refusing to comply with the experimenter’s instructions. Twenty-six of 40 subjects administered the highest shocks on the generator.
This study is often described as an experiment. However as there is no control condition (i.e. all of the participants took place in the same experimental procedure) it is not strictly speaking an experiment. The independent variable could be considered to be the prods provided by the experimenter for the participant to carry on, and the dependent variable could be considered to be the degree of obedience. That is, how far up the shock scale the participant went.
It is perhaps more accurate to describe the method used as a type of controlled observation. The study collected both quantitative data in the way that it measured the amount of volts given and qualitative data in the way that Milgram observed the participants emotional responses and interviewed the participants after the study.
40 males aged between 20 and 50 years of age, were recruited from the New Haven area. They were obtained by responding to a newspaper and direct mail advertisement which asked for volunteers to participate in a study of memory and learning at Yale University. The participants represented a wide range of occupations, including postal clerks, high-school teachers, salesmen, engineers and labourers. They were paid $4.50 for their participation in the experiment but importantly they were told that the payment was simply for coming to the laboratory, regardless of what happened after they arrived.
To improve the authenticity of the phoney shock generator written labels were also clearly indicated for groups of four switches: ‘slight shock’, ‘moderate shock’, ‘strong shock’, ‘very strong shock’, ‘intense shock’, ‘extreme intensity shock’, ‘danger: severe shock’. Two switches after this were marked XXX).

The experiment took place in a smart psychology laboratory in Yale University.

The role of experimenter was played by a 31-year-old biology teacher, who introduced himself as Jack Williams. He wore a grey technician’s coat and appeared stern and emotionless throughout the experiment.
The victim was played by Mr Wallace, a 47-year-old accountant, trained for the role, whom most observers found mild-mannered and likeable.
One participant and one victim (a confederate) were used in each trial. In order to justify the administration of the electric shocks by the participant a cover story was used. After a general introduction about the relation between punishment and learning the participants were told:
The participant was asked to draw a slip of paper from a hat to determine which role he would play. The draw was rigged so the participant was always the teacher and Mr. Wallace (the confederate) was always the learner.
The teacher (participant) and learner were taken to an adjacent room and in full view of the teacher (participant) the learner was strapped into the ‘electric chair’. The experimenter explained to the teacher (participant) that the straps were to prevent excessive movement while the learner was being shocked; the effect was to make it impossible for him to escape the situation. An electrode was attached to the learner’s wrist and electrode paste (cream) was applied ‘to avoid blisters and burns’. The participant (teacher) was told that the electrode was attached to the shock generator in the adjoining room. The participant (teacher) then heard the experimenter tell the learner ‘although the shocks can be extremely painful, they cause no permanent tissue damage’.
To further enhance the authenticity of the generator the participant (teacher) was given a sample shock of 45 volts, applied by pressing the third switch. The shock generator was actually powered by a 45-volt battery and not wired to the mains.
The participant (teacher) was then seated in an adjacent room in front of the shock generator and asked to read a series of word pairs to the learner. The learner was asked to learn (memorise) these pairs (this is known as ‘paired-association learning’). The participant (teacher) then tests the learner by giving him one of the words in a pair along with four other words. The learner has to indicate which of the four words had originally been paired with the first word. The learner’s answer was communicated by pressing one of four switches which illuminated a light on top of the shock generator. If the answer was correct the participant (teacher) had to move onto the next word on the list, if the answer was wrong the participant had to tell the learner the correct answer and then the level of punishment that they were going to give them. They would then press the first switch on the shock generator (15 volts). For every subsequent incorrect answer the participant was required to move one switch up the scale of shocks (15 volts higher than the voltage of the last shock delivered).
In all conditions the learner gives a predetermined set of responses to the word pair test, based on a schedule of approximately three wrong answers to one correct answer.
In this very first experiment, the procedure continued as the ‘remote victim’ experiment, whereby no vocal response or other sign of protest was heard from the learner until the shock level of 300 volts was reached. At this point the learner (Mr Wallace) pounded on the wall of the room and could be heard by the participant (teacher). From this point on, the learner’s answers no longer appeared on the panel, and many participants usually began to turn to the experimenter for guidance. The participant (teacher) was instructed to treat the absence of a response as a wrong answer and to shock the learner according to the usual schedule, allowing 5 to 10 seconds before considering no response as a wrong answer. The pounding on the wall was repeated after the 315 volt shock but subsequently the learner was not heard from, and his answers did not reappear on the panel.
If the participant asked advice from the experimenter, whether it be; ‘should I continue administering shocks’, or some other indication that he did not wish to go on, he would be given encouragement to continue with a sequence of standardised ‘prods’:

Prod 1: ‘Please continue’ or ‘Please go on’;

Prod 2: ‘The experiment requires that you continue’;

Prod 3: ‘It is absolutely essential that you continue’;

Prod 4: ‘You have no other choice, you must go on’.

The prods were always made in sequence. Only if Prod 1 was unsuccessful could Prod 2 be used, etc. If the participant continued to disobey after Prod 4, the experiment was terminated. The experimenter’s tone of voice was always firm, but not impolite.
If the participant asked if the learner could suffer permanent physical injury, a special prod was used; ‘although the shocks may be painful, there is no permanent tissue damage, so please go on’, followed by Prods 2, 3 and 4 if necessary. If the participant said that the learner did not want to go on, another special prod was used; ‘whether the learner likes it or not, you must go on until he has learned all the word pairs correctly, so please go on’, followed by Prods 2, 3 and 4 if necessary. The experiment would end either when the 450 volt shock had been administered, or when the participant walked out.
A participant who breaks off at any point prior to the highest shock level (450 volts) is called adefiant participant, while one who obeys up to the 450 volts is called an obedientparticipant.
The sessions were also filmed and notes were taken by observers looking through an observation mirror. The latency and duration of shocks were timed.
After the experiment, the participants were thoroughly debriefed using open-ended questions and to test that the participants were not harmed a number of psychometric measures (projective tests and attitude scales) were used.
The participant was also reunited with the victim to show them that the victim was not harmed and it was explained to them that there behaviour was normal. These measures were taken to ensure that the participants left that laboratory in a state of well being
All 40 of the participants obeyed up to 300 volts at which point 5 refused to continue. Four more gave one further shock before refusing; two broke off at the 330 volts level and one each at 345, 360 and 375 volts. Therefore, a total of 14 participants defied the experimenter, and 26 obeyed. Overall, 65% of the participants gave shocks up to 450 volts (obeyed) and 35% stopped sometime before 450 volts;
After the maximum shock had been administered, the participant was asked to continue at this level until the experimenter eventually called a halt to the proceedings, at which point many of the obedient participants heaved sighs of relief or shook their heads in apparent regret."