Fixed draw for teacher and learner
Learner 'Mr Wallace' had to remember pairs of words and each he's wrong the fake shock becomes more powerful
Teacher hear not see confederate
300v Learner pounded on the wall and then silent, 315v pounded again, silent for the rest
Experimenter (confederate in grey lab coat) used 4 props to keep Teacher going
Every participant delivered all the shocks up to 300v
12.5% (5) stopped at 300 volts (intense shock)
65% continued to highest (450v)
Observations of extreme tension
Before study 14 psychology students estimated >3% of participants would continue to 450v
All participants debriefed
Follow up questionnaire, 84% glad they participated
Further studies about situational variables
Proximity, same room 40%, forced hand 30%, instructions via telephone 20.5%
Uniform, experimenter ordinary person 20%