Social Psychology: How Others Shape Us

Social psychology studies how the presence, instructions, and expectations of other people change what we do — often more dramatically than we'd predict about ourselves. Three of psychology's most famous studies sit at the center of this chapter, and one of them holds up far worse under real, modern scrutiny than its textbook reputation suggests.

Milgram's Obedience Experiments: Real Numbers, Real Controversy

Stanley Milgram began his real obedience experiments in August 1961 at Yale University, first publishing the results in a 1963 journal article. Participants believed they were assisting in a memory study, taking on the role of "teacher" while a confederate actor played the "learner" in another room. For every wrong answer, the teacher was instructed to deliver an electric shock via a generator, increasing by 15 volts each time, up to a labeled maximum of 450 volts — while the learner's pre-recorded cries of pain grew steadily more distressed.

The study's real ethical fallout was substantial. Psychologist Diana Baumrind argued that even with informed consent to participate, Milgram bore real responsibility for the psychological distress his subjects visibly experienced, and that the study should have been halted once that distress appeared. Her critique is widely credited with driving a genuine, lasting revision of research ethics standards. Milgram himself pointed to a real follow-up finding in his own defense: 84% of former participants later reported being "glad" or "very glad" they had taken part.

Asch's Conformity Experiments: Bending to a Group You Can See Is Wrong

Solomon Asch ran his real conformity experiments in 1951 at Swarthmore College, using a simple perceptual task: a group of eight young men were shown a reference line, then asked which of three comparison lines matched it. Only one person in the room was a genuine participant — the other seven were actors instructed to unanimously give an obviously wrong answer on 12 of 18 total trials, with the real participant always answering last.

The Stanford Prison Experiment: A Real Story of Its Own Undoing

In 1971, Philip Zimbardo randomly assigned 24 screened male participants to play "guards" or "prisoners" in a mock prison built in Stanford's own basement, intending to run the simulation for two weeks. It was shut down after just six days, once guards' behavior toward prisoners had turned genuinely abusive. For decades, textbooks — including, honestly, many earlier drafts of exactly this kind of course — presented it as clean evidence that ordinary people will spontaneously turn cruel purely because of the situational power a role hands them.

A further real complication: the BBC Prison Study (2002-2006), which recreated a similar design but deliberately gave guards no behavioral coaching, produced genuinely different results. Zimbardo and colleagues have disputed parts of Le Texier's account, but multiple original participants have corroborated the coaching and staging he documented.

Reading These Three Studies Together

This isn't a reason to distrust social psychology as a field — Milgram's and Asch's own real, independently replicated findings show genuine, powerful social influence effects do exist. It's a reason to apply this course's own Chapter 5 lesson one more time: a study's fame and its scientific soundness aren't the same thing, and checking whether a famous result has actually been re-examined is worth doing before repeating it as settled fact.

Hands-On Exercises