Understanding Ordinary People, Extraordinary Situations
Social Psychology, often traced to Kurt Lewin's field theory ("behavior is a function of the person and their environment"), gained enormous momentum after World War II, as researchers sought to understand how ordinary people could participate in atrocity and mass compliance. Three landmark studies from this era still define the field's popular image.
Solomon Asch (1951) had participants judge simple line lengths in a group of confederates who unanimously gave an obviously wrong answer; on average, genuine participants conformed to the incorrect majority on about 37% of the critical trials — a striking demonstration of social conformity even against the plain evidence of one's own eyes.
Stanley Milgram (1961-63) told participants they were delivering increasingly severe electric shocks to a learner (in fact an actor, never actually shocked) whenever the learner answered incorrectly. In the best-known baseline version, about 65% of participants obeyed the experimenter's instructions all the way to the maximum, clearly dangerous shock level — revealing the surprising power of perceived legitimate authority over individual conscience.
Philip Zimbardo's Stanford Prison Experiment (1971) randomly assigned student volunteers to play "guards" or "prisoners" in a simulated prison; the study was planned to run two weeks but was halted after just six days as guards became abusively authoritarian and prisoners showed severe distress, illustrating how quickly assigned social roles can override individual disposition.
| Study | Researcher | Key finding |
|---|---|---|
| Conformity | Asch (1951) | ~37% conformity on critical trials |
| Obedience | Milgram (1961-63) | ~65% obeyed to maximum shock |
| Simulated prison | Zimbardo (1971) | Halted after 6 of a planned 14 days |
These studies also reshaped psychology's research ethics: the psychological distress caused to participants in the Milgram and Zimbardo studies helped drive the field toward mandatory informed consent, the right to withdraw, and independent ethical review boards for any study involving human participants.
Common pitfall: concluding from these studies that "anyone would do anything under pressure." The actual, more precise finding is that SITUATIONAL factors — perceived legitimate authority, gradual escalation, assigned social roles — reliably influence behavior far more than most people predict in advance, not that individual differences or resistance disappear entirely.
A shock-generator dial: a plain switch panel from "15 volts" to "450 volts DANGER"; a hand hesitates at a mid-range switch while an authority-figure silhouette gestures to continue.