The idea of recreating one of psychology’s most controversial experiments on television should have been a nonstarter from the start. When the BBC announced in 2002 that the controlled prison simulation would be turned into a documentary series, comparisons were immediately drawn to the 1971 Stanford Prison Experiment, a study so widely criticized for its ethical issues that it is now viewed as much as a discovery as a warning. The program is titled experimentset out to revisit the same question of how ordinary people behave when given power over others, but under conditions designed to avoid initial failure.
what is Stanford University Experiments designed to prove what went wrong
In August 1971, psychologist Philip Zimbardo and his colleagues built a mock prison in the basement of Stanford University. Twenty-four male students, selected from a pool of volunteers who had undergone physical and mental health screenings, were randomly assigned to the role of “guard” or “prisoner.” They were paid $15 a day and told the study would last two weeks.This goal is based on broader research on obedience and authority, building on research by Stanley Milgram and others. famous obedience experiment participants obey authority by administering so-called electric shocks to others. Zimbardo wanted to test whether behavior could be determined solely by context, and whether psychologically stable individuals would adopt the behaviors expected of their assigned roles in a prison-like system.The simulation is built around an elaborate structure in which prisoners are housed in small cells, identified by numbers rather than names, and subjected to routines that simulate a loss of autonomy. Guards work in shifts and are given broad powers to maintain order, but they are instructed not to use physical violence. Video cameras and microphones recorded the entire interaction.Within days, the situation worsened. Shocking evidence suggests prison guards are becoming increasingly aggressive and dehumanizing towards prisoners. Participants showed signs of severe stress, anxiety, emotional breakdown and withdrawal, and five prisoners had to be released early. Zimbardo himself, who served as prison warden, was engrossed in the simulation and ignored the abuse by prison guards until graduate student Christina Maslach raised objections to the conditions in the simulated prison and the ethics of continuing the experiment.
The experiment was scheduled to run for 14 days but was stopped after 6 days. It went on to become one of the most cited studies in psychology, often used to support the idea that people follow roles and that situations can override individual personalities. At the same time, it has been criticized for a lack of ethical safeguards, insufficient informed consent, psychological harm to participants, and questions about whether it implicitly encouraged guards to behave violently. By modern standards it would not be approved Establishing a research ethics framework.
Why the BBC is trying again
Thirty years later, psychologists Alex Haslam and Steve Reicher worked with the BBC to design a new study that re-examines the same core question under more rigorous scientific and ethical conditions. Their aim was not just to replicate Zimbardo’s findings, but to test them. Fifteen male participants were selected and placed in a purpose-built prison environment within a television studio in Elstree. Like the original, they are randomly assigned roles as guards or prisoners. The study is scheduled to take place over eight days and will be filmed and broadcast continuously.The experiment introduced stricter safeguards to avoid initial failure, was conducted under independent ethical oversight, allowed participants to withdraw at any time, ensured ongoing psychological monitoring, and prevented researchers from assuming a direct authoritative role within the system. This goal is more specific than in 1971. Haslam and Reicher wanted to examine how inequalities are maintained or challenged, whether people accept hierarchical roles or resist them, and under what conditions authority becomes stable or breaks down.
What really happened in the BBC study
The results did not follow the trajectory of the Stanford experiment. From the beginning, the Guardsmen worked hard to form a cohesive identity. They are unwilling to assert authority and appear uncomfortable enforcing discipline. Without a shared sense of purpose or group cohesion, their status is undermined. In contrast, the prisoners began to develop a stronger collective identity. Over time, they coordinated their actions, questioning the legitimacy of the guards’ authority and resisting the imposed hierarchy. As the research progressed, this shift became more apparent.
The BBC’s prison experiment shows prisoners forming alliances, refusing instructions, escaping and then trying to set up autonomous communes.
By the sixth day, the structure had effectively collapsed, culminating in participants orchestrating a breakout that rendered the guard-prisoner regime inoperable. Instead, they attempted to create an autonomous commune based on shared decision-making, but it soon collapsed due to internal tensions, particularly between those who had led the early resistance movement. A smaller group then proposed the creation of a new regime, with themselves as guard, this time intending to impose a stricter, more authoritarian structure.At this point, the researchers stepped in and ended the study early because emerging dynamics suggested a shift toward a more extreme system that could pose risks to participants’ well-being.
What BBC research found and why it matters
The BBC study, in stark contrast to the Stanford experiment, found no evidence that individuals naturally submit to authority or a submissive role. Power does not automatically produce tyranny. Instead, behavior depends on group dynamics, specifically whether individuals identify with their role and whether a cohesive group can form around the role. This is consistent with the concept of psychology deindividuationa person’s sense of personal identity is submerged in a group, making them more susceptible to collective behavior in settings such as protests or crowd movements, with ordinary people sometimes acting in more extreme or unusual ways. The failure of the guard was not a principled rejection of authority, but a lack of shared consent. Without cohesion, their authority remains fragile. Prisoners’ ability to challenge the system stems from the opposite condition: a heightened sense of collective identity that enables them to act together. These findings led Haslam and Reichel to argue that tyranny is not an inevitable consequence of power. This depends on social conditions, in particular whether the dominant group is able to organize itself and whether those dominated by it accept or resist this structure.
The study was later published in academic journals and often Quote as a direct challenge to the conclusions drawn from the Stanford experiment. It shifts the focus from individual submission to group processes, showing that leadership, identity, and collective behavior are central to understanding how systems of power operate.
Two experiments, two conclusions
These two studies, placed side by side, describe different mechanisms. Experiments from 1971 showed that roles and situations can prompt individuals to engage in extreme behavior, even in the absence of prior tendencies. Research from 2002 argued that a role alone is not enough, that power depends on whether people believe in it, organize around it and accept its legitimacy.Both studies have important limitations and cannot fully replicate real-world institutions. A key issue in each is a lack of ecological validity: artificial environments, whether simulated prisons or controlled behavioral settings, fail to capture the complexity, stress, and unpredictability of real prison life or systems of power. Therefore, although they provide insights into behavior under structured conditions, their findings are limited by the context in which they are produced.
