Conformity Experiments

Why This Matters

Conformity experiments are the backbone of social psychology's most important insight: your behavior is shaped far more by situations than you probably realize. The AP exam loves testing whether you understand the difference between informational influence (conforming because you genuinely don't know the answer), normative influence (conforming to fit in), and obedience to authority (following orders from someone in power). These distinctions show up constantly in multiple-choice questions and form the foundation of FRQ responses about social behavior.

What makes these experiments so testable is that they reveal predictable patterns in human behavior that challenge our assumptions about free will and personal responsibility. You're being tested on your ability to identify which type of social pressure is operating in a given scenario, what situational factors increase or decrease conformity, and how minority influence differs from majority influence. Don't just memorize who did what. Know what psychological mechanism each experiment demonstrates and when to apply it.

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Normative Influence: Conforming to Fit In

These experiments show how people change their behavior to gain social acceptance or avoid rejection, even when they privately disagree with the group. The key mechanism is public compliance without private acceptance. You go along to get along.

Asch Conformity Experiments

• 75% of participants conformed at least once to obviously wrong answers about line lengths, demonstrating that social pressure can override clear perceptual evidence
• Conformity peaked with 3-4 confederates and didn't increase much beyond that; even a single dissenter reduced conformity by roughly 80%
• Normative influence was the primary driver. Participants knew the right answer but feared social rejection for standing out

Crutchfield's Electronic Conformity Experiment

• Removed face-to-face interaction by having participants respond via electronic panels while seeing fake responses from "others"
• Conformity still occurred even without direct social contact, though at lower rates than Asch's setup. This proved that perceived group opinion alone is enough to generate pressure
• Tested more complex judgments beyond simple perceptual tasks, showing conformity extends to attitudes and opinions

Schachter's Deviation Experiment

• Groups rejected members who consistently disagreed with majority positions, demonstrating the real social cost of nonconformity
• "Slider" confederates who gradually came around to the group's position were accepted; "deviant" confederates who never agreed were excluded and disliked
• Illustrates why normative pressure works. The threat of rejection isn't hypothetical. It's measurable in how groups allocate attention, liking, and inclusion

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Informational Influence: Conforming When Uncertain

When situations are ambiguous, we look to others for guidance about reality itself. This produces private acceptance: you actually change your mind, not just your public behavior.

Sherif's Autokinetic Effect Experiment

• Used perceptual ambiguity (a stationary light that appears to move in a dark room) to show how group norms form organically
• Individual estimates converged toward a group norm over repeated trials. Participants genuinely internalized the group's judgment, and their estimates stayed shifted even when later tested alone
• Classic demonstration of informational influence. When you truly don't know the answer, others' responses become your best available evidence

Jenness' Bean Jar Experiment

• First published conformity experiment (1932). Participants estimated the number of beans in a jar individually, then revised their estimates after hearing group discussion
• Estimates shifted toward the group average, especially for participants whose initial guesses were far from the group
• Ambiguity drives conformity. The more uncertain the task, the more heavily we rely on social information to calibrate our own judgments

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Obedience to Authority

These experiments examine a specific type of social influence: compliance with direct orders from a legitimate authority figure. The mechanism isn't peer pressure. It's the perceived right of authorities to command obedience.

Milgram Obedience Experiment

• 65% of participants delivered the maximum 450-volt shock when ordered by an experimenter in a lab coat, despite hearing the "learner's" screams and protests
• Proximity matters. Obedience dropped when the learner was in the same room and dropped further when the participant had to physically place the learner's hand on the shock plate. Obedience also decreased when the authority figure gave instructions by phone rather than standing in the room
• Demonstrated the "agentic state." Participants shifted responsibility to the authority figure, viewing themselves as mere instruments carrying out someone else's will rather than as personally responsible agents

Stanford Prison Experiment (Zimbardo)

• Guards became increasingly abusive within days without receiving any specific instructions to mistreat prisoners. This demonstrated how roles and situational power shape behavior on their own
• Prisoners showed signs of learned helplessness and severe emotional distress; the study was terminated after only 6 days of a planned 2-week run
• Illustrates deindividuation and role internalization. Uniforms, anonymity, and the institutional context of a "prison" overrode personal values. Note: this study has faced significant methodological criticism, including questions about demand characteristics (guards may have behaved as they thought Zimbardo wanted) and the lack of a true control group. Still, it remains a widely cited example of situational influence on the AP exam

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Situational Factors in Helping Behavior

This research extends conformity principles to prosocial behavior, showing that whether you help someone depends heavily on circumstances, not just character.

Darley and Batson's Good Samaritan Experiment

• Hurried seminary students stepped over a person slumped in a doorway even when they were literally on their way to give a talk about the Good Samaritan parable
• Only 10% of "high hurry" participants stopped to help compared to 63% of those with no time pressure. Situational pressure trumped personal values and even the immediate salience of a helping-related message
• Demonstrates how context shapes prosocial behavior. Time pressure creates a kind of psychological tunnel vision that reduces awareness of others' needs. (Note: this study is related to bystander research but is specifically about situational constraints on helping, not the classic bystander effect of diffusion of responsibility)

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Minority Influence: When the Few Change the Many

Not all social influence flows from majority to minority. Under specific conditions, consistent minorities can shift majority opinions. This process tends to produce deeper, more lasting attitude change than majority pressure does.

Moscovici's Blue-Green Experiment

• Consistent minority confederates who repeatedly called blue slides "green" influenced majority participants to perceive more green in subsequent ambiguous tests
• Consistency is the critical factor. Minorities who wavered had virtually no effect; only unwavering disagreement produced influence
• Produces private acceptance through deeper cognitive processing. Majority influence tends to trigger quick surface-level compliance, but a persistent minority forces you to genuinely reconsider why they disagree, leading to real attitude change

Bond and Smith's Cross-Cultural Conformity Meta-Analysis

• Analyzed 133 Asch-type studies across 17 countries and found significant cultural variation in conformity rates
• Collectivist cultures (e.g., many East Asian and African nations) showed higher conformity than individualist cultures (e.g., the U.S., U.K.). In collectivist contexts, maintaining group harmony carries greater social weight
• Conformity rates have also declined over time within the U.S., suggesting that historical period and generational values matter alongside culture

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Quick Reference Table

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Self-Check Questions

1. Both Sherif's autokinetic experiment and Asch's line experiment produced conformity. What is the key difference in the type of influence operating in each, and how would participants' private beliefs differ afterward?

2. A student argues that Milgram's participants were just "bad people." Using evidence from the study, explain why this dispositional explanation is insufficient and what situational factors better account for the results.

3. Compare the Stanford Prison Experiment and Milgram's obedience study: both demonstrate situational power, but what is the critical difference in how that power was communicated to participants?

4. If an FRQ describes a scenario where someone changes their opinion after hearing a small group consistently argue an unpopular position, which experiment should you reference, and what key factor made that influence possible?

5. Why did Bond and Smith's cross-cultural research find higher conformity rates in collectivist cultures, and how does this finding complicate universal claims about conformity based on Asch's original American sample?