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The Basement Script
Philip Zimbardo claimed mock prison roles naturally bred cruelty, until forgotten basement recordings showed guards were actively coached to behave tough.
Assuming authority inevitably corrupts excuses institutional abuse and ignores the personal moral character, oversight, and systemic cues that actually determine how leaders treat others.
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Key facts
- The Stanford Prison Experiment was halted after just 6 days instead of running for its planned two weeks, after subjects mentally unraveled.
- Researchers selected 24 young male volunteers who seemed psychologically normal and physically healthy, then randomly assigned them as prisoners or guards in a basement prison simulation.
- Only about 10 percent of the experiment's 150 hours was recorded on video or audio tape, leaving most of the simulation unrecorded without any data collected on day three.
- The Stanford Prison Experiment was taught around the world for 40 years as evidence that social roles bring out the worst in people. Psychologist Alex Haslam said audio of researchers coaching a guard meant social psychology textbooks would need major revisions.
- In Milgram’s baseline obedience study, 65% of participants went all the way to 450 volts, administering apparently harmful shocks to a protesting victim under orders from an authority figure.
Timeline
Zimbardo barred guards from hitting prisoners but instructed them to create boredom, fear, frustration and a sense of powerlessness.
Read more: prisonexp.org, scientificamerican.com, stanfordmag.orgPalo Alto police staged mock arrests and booked the student prisoners before they were taken to the Jordan Hall basement.
Read more: jonestown.sdsu.edu, hawaiifriends.org, stanfordmag.orgPrisoner 8612, Douglas Korpi, had an emotional breakdown; he later said he had been faking it to get released.
Read more: hawaiifriends.org, prisonexp.org, globalnews.ca, tim.blogAfter Christina Maslach confronted him over the treatment of hooded, chained prisoners, Zimbardo ended the planned two-week study after six days.
Read more: prisonexp.org, static1.squarespace.com, prisonexp.org, prisonexp.orgPsychologists reported that many students could guess the study’s hypothesis and predict abusive guard behavior, raising the possibility that participants were responding to cues about what was expected.
Read more: simplypsychology.org, stanforddaily.com, gwern.netIn the BBC Prison Study, participants did not automatically conform to their assigned roles, and prisoners came to dominate the guards.
Read more: eclass.uowm.gr, prisonexp.org, pmc.ncbi.nlm.nih.govFast, Halevy and Galinsky reported that participants in high-power, low-status roles chose more demeaning activities for partners than participants in other power-and-status combinations.
Read more: gsb.stanford.eduArchival audio and former participants’ accounts brought researcher coaching and playacting back into debate; a joint statement later described the Stanford and BBC studies as limited, one-trial demonstrations.
Read more: globalnews.ca, static1.squarespace.com
Transcript
The Basement on Jordan Hall
Mara: August fourteenth, 1971, the basement of Jordan Hall at Stanford. Philip Zimbardo's team has built a mock prison down here, and he's briefing the students who'll guard it. By his own account, and the orientation was recorded, the rule is simple: no hitting. But they can create boredom, frustration, fear. And, in his words, 'a sense of powerlessness—that is, we have total power of the situation, and they have none.'
Eli: The question that sent us down there is plain: does power really turn ordinary people cruel, or was the Stanford Prison Experiment wrong all along? Today's angle is the coached illusion of spontaneous cruelty.
Mara: A basement with no windows, no clocks, and Zimbardo sleeping on a couch in his office upstairs for the week.
Eli: Start with who the guards were. Zimbardo says the team gave male student volunteers a battery of personality tests, seven scales, and kept two dozen who seemed most psychologically normal and physically healthy. Then chance decided guard or prisoner. Guards got military-style uniforms, billy clubs, handcuffs. Prisoners got uniforms with only a number, and lost their names.
Mara: He drew the contrast with Milgram himself.
Eli: And the rules came first. Zimbardo and the undergraduate playing warden set head counts, limits on toilet visits, push-ups and blanket-cleaning as punishment. Thibault Le Texier, a French researcher who went through the archive, reported that the warden spelled out the reception too: prisoners blindfolded, stripped, searched, and only ever called by number.
Mara: All of it meant to show something big. For forty years, classrooms taught the study as proof that powerful roles override who people are and bring out their worst. Alex Haslam, who'd later test that, recalls the claim: it 'showed people’s willingness to oppress others by simply putting on a prison guard uniform.'
Eli: The briefing had already asked for fear and powerlessness, though. 'Simply' carries a lot.
Mara: So the guards walked in screened as normal, holding clubs, and told to make prisoners feel powerless. Whether what came next grew out of them or out of those instructions, nobody could yet say.
The Cell Rebellion
Eli: The prisoners got a surprise first. Palo Alto police arrested them, handcuffed them, booked them, blindfolded them, and the team drove them to the basement. Zimbardo called that a key: once authorities take freedom away, 'only the authorities can give it back.' Then day one: nothing. On the audio, he says, guards are telling each other, 'Come on guys, let's take this seriously.' And Zimbardo remembers thinking, 'Oh my God, this is not going to work.'
Mara: Yet according to Zimbardo, guards did act when the blindfolded men arrived: they stripped them naked in front of a big mirror, then took the blindfolds off. Those are deindividuation tactics: take away the clothes, the name, anything that marks someone as themselves, and they feel smaller and easier to push around.
Eli: Zimbardo's own label for that moment: 'the start of institutional depersonalization.'
Mara: Then the prisoners pushed back. One remembers, 'we realized that we could join together and do passive resistance and cause some problems.' And here's Zimbardo on the guards: 'They felt awkward in their uniforms. They didn't get into the guard mentality until the prisoners started to revolt.'
Eli: So on Zimbardo's own telling, it was the revolt that switched them on.
Mara: And they switched on hard. Guards blasted the cells with a skin-chilling burst of carbon dioxide from a fire extinguisher, broke in, stripped the prisoners and took their beds. Prisoner 8612, a ringleader of the revolt, ended up in a dark closet screaming, 'I'm burning up inside!' He later said he'd faked it, an exit so he could study for his graduate exams. Another prisoner confirms that's his account: 'he chose to fake it.'
Eli: So the cruelty began after a quiet day Zimbardo feared was a failure, and after a revolt. Which of those set it off is still open, Mara.
The Six-Day Collapse
Mara: Thursday night, five days in, Christina Maslach came to see it. She wasn't on the team. She'd just finished her Stanford doctorate and was packing for a professor's job at Berkeley. She went, she said, 'to get some sense of what was going on.'
Eli: What she walked into was the ten o'clock toilet run, the prisoners' last trip to a real toilet before buckets in their cells. The night shift used it to torment them: bags over heads, legs chained. Craig Haney, a graduate researcher, said the first time was shocking, then 'By the next day we're putting bags on their heads and not thinking about it.' Zimbardo was principal investigator and superintendent at once. In his view, that's the study's major flaw: no independent observer, his days spent on meals and shift changes instead of data. Call it role immersion bias.
Mara: So the scientist meant to watch the prison had become the man running it.
Eli: And he says it changed him: 'caring more about my guards than about the prisoners.'
Mara: Maslach saw the hooded prisoners marched to the bathroom and felt sick to her stomach. She ran outside in tears. She was the only one who reacted that way; others teased her and questioned her as a psychologist. Zimbardo, she said, 'was especially annoyed by my unwillingness to be interested in what I was seeing.' She told him what was being done to the participants was terrible, that his role had warped his view. They argued for hours.
Eli: And she wasn't an outsider to him. The two were considering marriage.
Mara: The study was meant to run two weeks. Zimbardo ended it after six days. He'd later sum it up: 'In only a few days, our guards became sadistic and our prisoners became depressed and showed extreme stress.'
Eli: Two-thirds of those guards never turned sadistic, though. Some stayed fair, some just passive.
Mara: One prisoner, who spent part of a hunger strike in a janitor's closet, has said for fifty years the study has 'no scientific value whatsoever.' Zimbardo spoke of guards gone sadistic. Whether six days showed roles breeding tyranny, or a researcher who'd lost his distance, was still unsettled.
The Scripted Basement
Eli: Back to that basement, August 1971, on a tape the French filmmaker Thibault Le Texier dug up and transcribed in 2018. The undergraduate warden takes a guard aside. He wants him 'active and involved,' because 'every guard is going to be what we call a ‘tough guard.’' The guard answers, 'I'm not too tough.' And the warden tells him he has to try and get it in him.
Mara: A guard admitting he's not tough, and the staff telling him to become it.
Eli: One psychologist who heard it said the team was 'repeatedly pressuring him to do exactly what they wanted him to do, which in a psychology experiment is totally unheard of.' Alex Haslam says some guards resisted and were cajoled into their roles, a reading still contested. So that first briefing was an institutional role orientation: the people in charge spelling out how authority expected guards to behave.
Mara: And the guard the study called the most brutal says he was acting. Dave Eshelman faked a Southern accent and went by John Wayne. He had, he says, a 'definite plan in mind, to try to force the action, force something to happen, so that the researchers would have something to work with.' Like that faked breakdown in the closet, it was a performance, by his own account.
Eli: He modeled it on the warden in Cool Hand Luke, and thought he was helping the researchers.
Mara: Eli, Zimbardo, Haney and Maslach hold the other reading: roles eroding restraint, unprompted.
Eli: That runs against a critique from 1975. Two scholars argued the students were acting out stereotypes in response to demand characteristics: cues in a study, spoken or not, that tell people what the researcher hopes to see. Clubs, 'total power,' a warden asking for tough guards. And former guard John Mark said in 2018 the story will end up saying 'more about Zimbardo' than about his subjects.
Mara: The recordings and testimonies point to steered theatre, rather than a controlled experiment.
Eli: What nobody's measured is unchecked power over years, inside a real institution nobody watches. A prison with nobody steering, though, can be built. Alex Haslam and Stephen Reicher did it for the BBC, giving guards no direction. The guards hesitated. The prisoners organized faster and took over, until guards were 'increasingly paranoid, depressed and stressed and complained most of being bullied.' Several quit; no prisoner did. Haslam and Reicher concluded groups and power don't corrupt 'in and of themselves.' Tyranny, in their reading, still contested, may involve identifying with authorities who frame vicious acts as virtuous.
Mara: Uncoached, the guards were the ones who cracked. And in August 2018, the old rivals stood together: Zimbardo and Haney with Haslam and Reicher, calling for 'an open and respectful debate.' Reicher said it had at times 'overstepped the boundary from a robust battle of ideas to personal abuse.'
Eli: So the toughness in that basement was asked for, and the prison without the asking produced no tyrants. What power does when nobody directs it is the sharper question now.
Power Without Status
Mara: For a study this famous, here's the odd part: it never appeared in a peer-reviewed psychology journal. Zimbardo told Stanford Magazine in 2011, 'It wasn't a formal experiment,' and he's said it should have been called an exploration. One psychologist argued in 2018 it wasn't fraud, because it was never treated as science: 'It’s typically presented in classrooms as a demonstration, not an experiment.' Others dispute that framing.
Eli: Which fits those six days: most guards not cruel, and no detached observer.
Mara: And it sits inside a wider reckoning, the replication crisis: psychologists rerunning famous studies and finding many results simply don't come back.
Eli: Which raises what does turn power nasty. In 2011, Nathanael Fast and two colleagues pulled power and status apart. Students were told they'd do a business exercise with a partner, and chance put them in a high-status 'Idea Producer' role or a low-status 'Worker' role. Then they chose activities for that partner from a list of ten. Some were demeaning. One was barking like a dog three times.
Mara: Small humiliations, the kind that show what someone does with a little control.
Eli: The barking came mostly from one corner. People with high power but low status picked more demeaning tasks than any other combination. Fast's team argues low status feels threatening, and power frees people to act on that feeling. On their reading, power alone or low status alone doesn't lead to mistreatment.
Mara: And they suggest a fix: make people feel respected and valued, whatever their role. Fast added advancement. Knowing a better role or a bonus for treating others well might come 'may help ameliorate their negative feelings and behavior.'
Eli: So in that lab, the cruelty took power plus a role that felt small. Whether power wears down empathy on its own, or amplifies what's already there, is where the argument goes next, Mara.
The Amplifier
Mara: In 2012, Ana Guinote and colleagues found power-holders express their character more strongly. They're also far more swayed by cues around them than people without power. Guinote's words: 'the environment crucially triggers dispositional or counter-dispositional behavior in powerful people,' a claim still debated. Moral identity, Guinote and colleagues argued, sets the direction: power corrupts those with a weak one and lets those with a strong one act for the common good. Like the BBC guards: power, and no cue toward cruelty.
Eli: Call that a moral identity buffer: values held before power arrives that keep it from eroding empathy. The other reading belongs to Adam Galinsky, Lin Guo and Xiang Yun: power itself wears empathy down. In surveys of Polish and American employees, power over others predicted verbal aggression and exploitativeness; control over one's own life didn't. Galinsky's team wrote that for the powerful, 'the situation loses its suffocating hold,' leaving 'their own opinions, beliefs, attitudes, and personalities to drive their behavior.'
Mara: Guo and Yun tested it in 2026. Priming people to feel powerful lowered their empathy in the moment, and with it their implicit aversion to violence. But among people high in trait empathy, power made no measurable difference, a finding still argued over. And Nicole Mead's study of about two hundred people found power didn't make everyone a tyrant. Only those with high baseline testosterone grew more exploitative and entitled, and that explained their willingness to misuse it.
Eli: On this evidence, who holds power, and who checks them, matters more than the power.
Mara: Power, on this evidence, amplifies what people bring in and what their institution asks of them. Back in that basement in 1971, Zimbardo asked his guards for fear and powerlessness. Some answered loudly. Most didn't. The power was the same; what came out of it depended on the person and the ask.
Eli: Three things to watch. Whether shifting accounts, like Prisoner 8612's, blur the line between real panic and acting. What further archive finds reveal about the ninety percent of 1971 nobody filmed. And whether field research can measure competing sources of power and status outside the lab.
Mara: For more on the cues that shape participant behavior, look into demand characteristics.
Eli: Follow science with us as researchers test what power actually changes in people.
Mara: That's all for this one. I'm Mara.
Eli: And I'm Eli. Thanks for listening to Angle. Until next time.
Presented by Mara & Eli
Mara and Eli are fictional presenters with synthetic voices. Their biography is character design, never evidence.
In this story
- Category
Connections
- Led the Stanford Prison Experiment and briefed the guards.
- Served as the warden and directed prisoners’ reception procedures.
- Was a guard in the study and later said he acted out a tough persona.
- Confronted Zimbardo after seeing the treatment of prisoners; the study ended the next morning.
- Co-conducted the BBC Prison Study with Stephen Reicher.
- Co-conducted the BBC Prison Study with Alex Haslam.
- The study was presented as evidence about power, roles, and cruelty.
Sources
- Primary PDF document — gwern.net
- Philip Zimbardo’s Response to Recent Criticisms of the Stanford Prison Experiment — Stanford Prison Experiment — www.prisonexp.org
- The Menace Within | STANFORD magazine — stanfordmag.org
- Power Corrupts, Especially When It Lacks Status | Stanford Graduate School of Business — www.gsb.stanford.edu
- Primary PDF document — static1.squarespace.com
- Rethinking the Infamous Stanford Prison Experiment | Scientific American — www.scientificamerican.com
- Philip Zimbardo on heroism, shyness and the Stanford Prison Experiment — www.apa.org
- Primary PDF document — jonestown.sdsu.edu
- Primary PDF document — static1.squarespace.com
- Test — Stanford Prison Experiment — www.prisonexp.org
- Primary PDF document — files.eric.ed.gov
- The infamous Stanford prison experiment was flawed – so why is it still so influential today? : Find an Expert : The University of Melbourne — findanexpert.unimelb.edu.au
- Stanford Prison Experiment: Zimbardo's Famous Study — www.simplypsychology.org
- Does Power Corrupt Everyone Equally? — greatergood.berkeley.edu
- 8. Conclusion — Stanford Prison Experiment — www.prisonexp.org
- The Stanford Prison experiment: an outsider's view - Hodder Education Magazines — magazines.hachettelearning.com
- Primary PDF document — hawaiifriends.org
- Unchaining the Stanford Prison Experiment: Philip Zimbardo’s famous study falls under scrutiny — stanforddaily.com
- Power Corrupts, but Control Does Not: What Stands Behind the Effects of Holding High Positions - PMC — pmc.ncbi.nlm.nih.gov
- Power corrupts because it inflates narcissism — www.unimelb.edu.au
- The impact of power on implicit attitudes toward violence: empathy as a mediator and moderator | BMC Psychology | Springer Nature Link — link.springer.com
- Being in Power Does Not Always Magnify Personality – Association for Psychological Science – APS — www.psychologicalscience.org
- Primary PDF document — sites.nd.edu
- Primary PDF document — eclass.uowm.gr
- Interview: Nat Geo’s ‘The Stanford Prison Experiment: Unlocking the Truth’ - with Clay Ramsay - Nerds and Beyond — www.nerdsandbeyond.com
- The Tim Ferriss Show Transcripts: Dr. Phil Zimbardo (#226) - The Blog of Author Tim Ferriss — tim.blog
- Philip Zimbardo reflects on 'The Stanford Prison Experiment' movie — stanforddaily.com
- Why the Stanford Prison Experiment was wrong about good and evil - National | Globalnews.ca — globalnews.ca
- Contesting the “Nature” Of Conformity: What Milgram and Zimbardo's Studies Really Show - PMC — pmc.ncbi.nlm.nih.gov
- Researchers unite to call for respectful debate of Stanford Prison Experiment - School of Psychology - University of Queensland — psychology.uq.edu.au
- Zimbardo blames military brass for Abu Ghraib torture — www1.udel.edu
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