Core topic 11 of 13
Social psychology's famous studies, checked against what came after
The classic demonstrations of conformity and obedience are the most quoted studies in psychology and the most heavily revised. Asch and Milgram survive in modified form. The Stanford Prison Experiment does not, and the newspaper story behind the bystander effect turned out to be wrong in most of its details.
Social psychology took the hardest hit during the replication crisis, partly because its findings were the most counterintuitive and therefore the most published. What remains after the re-examination is still substantial. It is just narrower than the textbook version.
Findings that survived
Asch conformity Replicated
Participants asked to judge which line matched a reference line gave obviously wrong answers when a group of confederates gave them first. About 75 percent conformed at least once. Rod Bond and Peter Smith's meta-analysis of 133 studies confirmed the effect across cultures while finding it has weakened in Western samples over the decades and remains stronger where group harmony is valued more highly.
Obedience to authority Replicated
Milgram's participants continued delivering what they believed were escalating electric shocks because a man in a lab coat told them to. Jerry Burger repeated a modified version in 2009, stopping at 150 volts for ethical reasons, and found comparable rates. Gina Perry's work in the Yale archives complicated the story considerably: the experimenter improvised pressure beyond the script, and Milgram's own reporting selected favourably among 24 variations.
Quiet members are underweighted in groups Replicated
Airtime in a discussion predicts how competent the group rates a member, independent of the quality of what they said. This is one reason written idea collection outperforms open brainstorming, and it is covered from the trait side on the introversion and extraversion.
Minimal group in-group favouritism Replicated
Henri Tajfel divided people by something as arbitrary as a coin toss or a preference between two painters, and they immediately allocated more resources to their own group. The finding replicates easily and is one of the more disturbing results in the field, because no history, competition or grievance is required.
Reassessed or discredited
Stanford Prison Experiment Debunked
Zimbardo's 1971 study is still in textbooks as evidence that situations turn ordinary people cruel. Recordings released by Stanford and Le Texier's archival analysis show guards receiving explicit instruction to be tough, a participant later saying his famous breakdown was performance, and no control group. Whatever the study demonstrated, it was not spontaneous role absorption.
The bystander effect as told Contested
Darley and Latané's laboratory work found that people helped less when others were present, and that finding has replicated many times. The Kitty Genovese case that prompted it was misreported by the New York Times, which claimed 38 witnesses watched and did nothing. Later investigation found far fewer witnesses, several calls to police, and a neighbour who went to her. Philpot's CCTV study of 219 real conflicts found intervention in nine cases out of ten.
Robbers Cave and realistic conflict Contested
Muzafer Sherif's summer camp study describing boys forming hostile tribes over competition is widely cited. Gina Perry's archival research uncovered an earlier version of the same study where the boys refused to turn on each other, which Sherif abandoned and never published. Selective reporting of that kind changes what the surviving study can support.
What social psychology still tells you reliably
Situations shape behaviour more than most people expect, and the expectation gap is itself a documented bias. Group size changes individual accountability. Arbitrary category boundaries create loyalty quickly. Public commitment changes later behaviour more than private intention. These are the load-bearing findings, and they survived the last fifteen years of scrutiny largely intact.
What did not survive is the strong version where situations override everything about a person. Most large studies find both situation and disposition contributing, with the balance shifting by context.
Watch this on the channelVideos revisiting Milgram, Asch and the Stanford Prison Experiment with the archival evidence.
Open Psychology Cue on YouTubeQuestions people ask about this topic
Is the Stanford Prison Experiment valid?
No. Archival work and released recordings show guards were coached toward cruelty, there was no control condition, and a famous breakdown was later described by the participant as acting.
Does the Asch conformity experiment still replicate?
Yes, with a smaller effect. A meta-analysis of 133 studies across 17 countries found conformity persists, has declined in Western samples, and is stronger in collectivist cultures.
Was the Milgram obedience study accurate?
The core finding survives modified replication, but archival research showed the procedure varied more than reported and that the experimenter pressed some participants beyond the script.
Is the bystander effect real?
The laboratory effect is real, though the Kitty Genovese story was largely inaccurate, and CCTV analysis of real conflicts found someone intervened about 90 percent of the time.