Historical Context & Motivation
The study of conformity and obedience did not emerge from abstract curiosity — it was born from one of history's darkest chapters. After World War II, psychologists and ordinary citizens alike struggled to understand how millions of people could participate in or silently accept the atrocities of the Holocaust. How could so many individuals follow orders to harm innocent people? Were those who carried out such acts fundamentally different from the rest of us, or could social pressure push anyone toward destructive behavior?
These unsettling questions drove a generation of social psychologists to design experiments that would probe the limits of human independence. Their findings were startling: the power of the group and the power of authority turned out to be far stronger than most people imagined. The landmark studies by Solomon Asch and Stanley Milgram revealed that ordinary, well-meaning individuals could be led to deny what their own eyes told them or to inflict apparent pain on a stranger — simply because of social influence.
Together, these studies raised a central question that remains relevant today: Under what conditions do people abandon their own judgment to follow a group or an authority figure? This lesson will explore that question by examining both conformity (adjusting behavior to match a group) and obedience (following direct orders from an authority), along with the key factors that increase each.
Core Principles & Definitions
Before diving into the experiments, it helps to clearly define the concepts we are working with. Conformity is the tendency to change your behavior, attitudes, or beliefs to match the norms of a group. It does not require a direct order — it happens because of real or imagined group pressure. Obedience, on the other hand, involves changing your behavior in response to a direct command from someone you perceive as an authority figure. Both are forms of social influence, but they differ in their source and dynamics.
Normative Social Influence
Informational Social Influence
Compliance vs. Internalization
Obedience to Authority
Situationism
Asch's Conformity Experiment — Visual Explanation
In Asch's classic study, a participant was placed in a room with several confederates — people secretly working for the experimenter. The group was shown a card with a single standard line and another card with three comparison lines. Each person stated aloud which comparison line matched the standard. The correct answer was always obvious, but on certain critical trials, the confederates unanimously chose the wrong line. The real question was: would the true participant go along with the group's clearly incorrect answer?
As the diagram shows, the correct answer was unmistakable — Line B obviously matched the standard in length. Yet across 12 critical trials, about 37% of responses were conforming (incorrect), and a full 75% of participants conformed at least once. When participants were later asked why they went along, many said they doubted themselves or did not want to stand out. This result demonstrates how powerful normative social influence can be — even when the group is clearly wrong and the task is straightforward.
Milgram's Obedience Study — How It Worked
Stanley Milgram designed his famous study at Yale University in 1961 to test how far ordinary people would go when ordered to harm another person. Participants believed they were taking part in a "learning and memory" experiment. They were assigned the role of "teacher" and told to administer increasingly powerful electric shocks to a "learner" (actually a confederate) every time the learner gave a wrong answer. No real shocks were delivered, but the participants did not know this.
The shock generator was labeled from 15 volts ("Slight Shock") up to 450 volts ("XXX — Danger: Severe Shock"). As the voltage increased, the learner's recorded protests escalated — from grunts, to screams, to pounding on the wall, and eventually to complete silence. When participants hesitated, the experimenter (the authority figure, wearing a lab coat) used a series of verbal prods: "Please continue," "The experiment requires that you continue," "It is absolutely essential that you continue," and "You have no other choice — you must go on."
The results stunned the psychological community. Before the experiment, Milgram surveyed psychiatrists who predicted that fewer than 1% of participants would administer the maximum shock. In reality, 65% obeyed all the way to 450 volts. Participants were visibly distressed — sweating, trembling, even laughing nervously — yet the majority continued when the experimenter insisted. Milgram concluded that the power of the situation, especially the presence of a legitimate authority figure, overwhelmed participants' personal moral objections.
Factors That Increase Conformity & Obedience
Both Asch and Milgram ran many variations of their original experiments, systematically changing one element at a time to see what increased or decreased conformity and obedience. These variations reveal that social influence is not an all-or-nothing phenomenon — it depends on specific situational factors.
Factors That Increase Conformity (Asch Variations)
| Factor | What Changed | Effect on Conformity |
|---|---|---|
| Group Size | Asch varied the number of confederates from 1 to 15. | Conformity increased as group size grew up to about 3–5 members, then plateaued. Adding more people beyond this point had diminishing returns. |
| Unanimity | One confederate broke from the majority and gave the correct answer. | Conformity dropped dramatically — by about 80%. Having even one ally empowered participants to trust their own eyes. |
| Task Difficulty | Lines were made more similar in length, increasing ambiguity. | Conformity increased when the task was harder. People were more likely to rely on the group when they felt less certain. |
| Public vs. Private Response | Participants wrote answers privately instead of saying them aloud. | Conformity dropped sharply. When no one could see your answer, the normative pressure to fit in was greatly reduced. |
| Group Status / Expertise | Confederates were presented as more knowledgeable or high-status. | Conformity increased when participants believed group members were experts or of higher social status. |
Factors That Increase Obedience (Milgram Variations)
| Factor | What Changed | Obedience Rate |
|---|---|---|
| Proximity of Authority | Experimenter gave orders by telephone instead of in person. | Obedience dropped to about 21%. Physical presence of authority increases compliance. |
| Proximity of Victim | Learner was placed in the same room as the teacher, or the teacher had to hold the learner's hand on the shock plate. | Obedience dropped to about 30–40%. Being closer to the person suffering made it harder to continue. |
| Legitimacy of Authority | The experiment was moved from prestigious Yale to a run-down office building. | Obedience dropped to about 48%. The institutional setting conferred legitimacy on the authority figure. |
| Presence of Disobedient Peers | Two confederate "teachers" refused to continue partway through. | Obedience plunged to about 10%. Seeing others defy authority gave participants social permission to stop. |
| Personal Responsibility | Experimenter explicitly stated he would take full responsibility for any harm. | Obedience increased. Diffusing responsibility made it easier for participants to continue. |
Worked Example — Analyzing a Social Situation
Let's apply what we've learned to a realistic scenario. Read the situation carefully, then follow along as we identify which type of social influence is at work and which factors are increasing it.
Strengths & Limitations of the Classic Studies
While Asch's and Milgram's experiments are among the most famous in all of psychology, they are not without criticism. Understanding both the strengths and limitations of these studies is essential for thinking critically about social psychological research.
| Study | Strengths | Limitations |
|---|---|---|
| Asch (Conformity) | Highly controlled lab setting allowed clear cause-and-effect conclusions. Systematic variations isolated specific factors (group size, unanimity). Results have been replicated across multiple cultures. | Used a trivial task (line lengths) — conformity on important life decisions may differ. Original sample was all-male American college students, limiting generalizability. The artificial setting may not reflect real-world conformity pressures. |
| Milgram (Obedience) | Revealed an unexpected and important truth about human behavior. Numerous variations identified specific conditions that increase or decrease obedience. Findings have real-world relevance to understanding events like the Holocaust, corporate wrongdoing, and military atrocities. | Significant ethical concerns: participants were deceived and experienced extreme stress. Original participants were all male. Some critics argue participants may not have truly believed the shocks were real (demand characteristics). The laboratory setting may not fully replicate the gradual, complex processes of real-world obedience. |
Connection to Broader Social Psychology
Conformity and obedience are foundational topics, but they connect to a much larger web of ideas in social psychology. Understanding these connections helps you see how the concepts you are learning fit into the bigger picture of how social situations shape human behavior.
| Concept from This Lesson | Related Advanced Concept | Connection |
|---|---|---|
| Normative Social Influence | Groupthink (Janis, 1972) | When normative pressure becomes extreme within a decision-making group, members suppress dissent, leading to flawed decisions. Groupthink explains real-world disasters like the Challenger explosion. |
| Obedience to Authority | Agentic State Theory (Milgram) | Milgram proposed that when obeying authority, people enter an 'agentic state' — they see themselves as mere instruments of someone else's will, reducing their sense of personal responsibility. |
| Situationism | Fundamental Attribution Error | People tend to attribute others' behavior to personality traits rather than situational factors. Milgram's study is a powerful demonstration of why this bias is misleading — ordinary people obeyed, not because they were cruel, but because of the situation. |
| Compliance | Foot-in-the-Door Technique | Milgram's shock increments worked like a foot-in-the-door approach: starting with a small, reasonable request (15V) and gradually escalating. Once someone has complied with a small request, they find it hard to draw the line later. |
As you continue studying psychology, you will encounter these advanced concepts in greater depth. For now, the key insight is that conformity and obedience are not isolated topics — they are part of a broader understanding of how situations shape behavior in ways that people rarely predict or expect. This principle — that we underestimate the power of the situation — is one of the most important ideas in all of social psychology.
Practice Problems
Lesson Summary
Conformity is the tendency to adjust your behavior to match a group, driven by normative social influence (the desire to be liked) and informational social influence (the desire to be correct). Solomon Asch's line experiments demonstrated that about 75% of people conform at least once when a unanimous group gives an obviously wrong answer. Key factors that increase conformity include larger group size (up to about 3–5), unanimity of the group, public responses, and task difficulty. Conformity drops most sharply when unanimity is broken by even a single dissenter.
Obedience involves following a direct command from a perceived authority figure. Stanley Milgram's shock experiments revealed that 65% of participants administered the maximum 450-volt shock when instructed by an authority figure. Obedience increases with physical proximity of authority, distance from the victim, legitimacy of the authority, and diffusion of responsibility. The strongest protection against both conformity and obedience is the presence of an ally or dissenter. Both studies powerfully demonstrate the core social-psychological principle of situationism — that the power of the situation often matters more than individual personality.