Milgram's Obedience Behavioural Obedience Study (1963)

A Deep Dive into Milgram’s Obedience Experiment

In the early 1960s, psychologist Stanley Milgram at Yale University designed one of the most famous and controversial studies in psychology. His goal was to investigate a haunting question that emerged after World War II: How could ordinary people participate in atrocities, not out of hatred or cruelty, but simply because they were “following orders”?(Milgram, 1963).

Milgram’s findings were unsettling — most people were willing to harm another person if instructed to do so by an authority figure.

The Experiment Setup

Milgram (1963) recruited 40 men from the New Haven area, aged 20–50, representing various occupations such as postal workers, salesmen, engineers, and teachers. Participants believed they were volunteering for a study on memory and learning.

Each volunteer arrived at Yale’s psychology lab, where they met another man — the “learner.” Unbeknownst to the participant, the learner was an actor. The participant was always assigned the role of the “teacher.” The teacher’s task was to test the learner’s memory, administering an electric shock for every wrong answer.

The Shock Machine

The shock generator contained 30 switches, ranging from 15 volts (“Slight Shock”) to 450 volts (“Danger: Severe Shock”). Labels escalated in severity, creating the illusion of real danger. Before beginning, the teacher even received a 45-volt sample shock to make the procedure seem authentic (Milgram, 1963).

In reality, the learner never received shocks. Instead, he followed a script: protesting loudly around 150 volts, refusing to continue at 300 volts, and eventually falling silent. The teacher, however, was told to treat silence as a wrong answer and continue delivering shocks.

Authority Pressure

The authority figure — the experimenter in a lab coat — urged the teacher to proceed whenever they hesitated. Milgram (1963) standardized four prompts, escalating from “Please continue” to “You have no other choice, you must go on.” If the participant still refused after the fourth prompt, the experiment ended (Milgram, 1963).

The Results

Milgram’s colleagues had predicted that only about 1% of participants would administer the maximum shock. The actual results were shocking: all participants went beyond 300 volts, and 65% (26 of 40) delivered the maximum 450 volts, even when the learner had stopped responding. Only 35% ultimately refused, but only after strong resistance (Milgram, 1963).

Emotional Reactions

Participants showed intense distress, including sweating, trembling, nervous laughter, and even seizures. Despite this, most complied under pressure. Afterward, participants expressed relief that no real harm occurred, often insisting they were not cruel people (Milgram, 1974).

Why Did People Obey?

Milgram (1974) identified several key factors behind obedience:

• Authority of Yale University – The prestigious institution gave credibility.

• Role of the experimenter – The lab coat projected authority and calm control.

• Scientific purpose – Participants believed they were helping valuable research.

• Voluntary commitment – Having agreed to participate, quitting felt like breaking a promise.

• Diffusion of responsibility – Responsibility seemed to rest with the experimenter, not themselves.

• Ambiguity – Participants were unsure of the boundaries of psychological research.

• Gradual escalation – Increasing shocks step by step made it harder to refuse suddenly.

The Bigger Picture

Milgram connected his results to historical atrocities such as the Holocaust, where individuals justified harmful actions by claiming they were “just following orders.” His research demonstrated that ordinary people are capable of destructive obedience when pressured by authority — not because they are inherently cruel, but because social forces can override personal morals (Milgram, 1974).

Why It Still Matters Today

Decades later, Milgram’s study remains one of psychology’s most cited experiments. It continues to influence debates about ethics in research, authority in institutions, and moral decision-making in everyday life (Burger, 2009).

The unsettling lesson endures: to prevent destructive obedience, individuals must stay aware of how authority shapes behavior — and recognize when compliance becomes harmful.

Further Reading & Resources

• Milgram, S. (1963). Behavioral study of obedience. Journal of Abnormal and Social Psychology, 67(4), 371–378.

• Milgram, S. (1974). Obedience to Authority. New York: Harper & Row. (Milgram’s own book with more detail about the experiments.)

• Blass, T. (2004). The Man Who Shocked the World: The Life and Legacy of Stanley Milgram. New York: Basic Books.

• Haslam, S. A., & Reicher, S. D. (2012). Contesting the “nature” of conformity: What Milgram and Zimbardo’s studies really show. PLoS Biology, 10(11), e1001426.

• BBC Documentary (2009): The Science of Obedience – a modern replication of Milgram’s experiment.

References

• Burger, J. M. (2009). Replicating Milgram: Would people still obey today? American Psychologist, 64(1), 1–11. https://doi.org/10.1037/a0010932

• Milgram, S. (1963). Behavioral study of obedience. Journal of Abnormal and Social Psychology, 67(4), 371–378. https://doi.org/10.1037/h0040525

• Milgram, S. (1974). Obedience to authority. Harper & Row.