The Psychology of your 20s
The Psychology of your 20s

462. The truth about the Stanford Prison Experiment

September 27, 2026

AI Summary

5 min read

In August 1971, a 23-year-old Stanford student named Douglas Korpi was recorded screaming hysterically in a makeshift prison cell in the basement of the psychology department. The audio went viral for its time, becoming the defining sound of the Stanford Prison Experiment—proof, it seemed, that ordinary young men could be psychologically broken by the mere experience of being a prisoner. Decades later, Korpi told a different story: he wasn't having a breakdown. He was acting. He had exams coming up, the researchers wouldn't let him leave, and he figured the only way out was to convince the clinicians he was going insane. That single contradiction—was the distress real or performed?—opens the door to a much deeper reckoning with one of psychology's most famous and most misunderstood studies.

The experiment that was supposed to explain evil

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What you'll learn

  • 1 (03:11) **Introduction & Series Context** - Host Gemma Spike introduces the "debunking psychology" mini-series and announces today's topic: the Stanford Prison Experiment.
  • 2 (05:21) **Historical Context: Why This Study Was Done** - The post-WWII drive to understand how ordinary people commit atrocities, and the specific questions the experiment aimed to answer.
  • 3 (06:55) **Original Purpose & Study Design** - The stated goal was to understand how norms, roles, labels, and uniforms create a prison environment, even when conditions should be "good."
  • 4 (11:09) **The Simulation Becomes Real** - The extreme measures taken to make the simulation feel authentic, including actual arrests by local police.
  • 5 (13:29) **Rapid Escalation & Early Collapse** - The simulation became intensely distressing very quickly, leading to the experiment's early termination after just six days.
  • 6 (15:48) **Ethical Catastrophes** - A breakdown of the major ethical failures: lack of informed consent, conflict of roles, and failure to debrief.
  • 7 (18:27) **Methodological Controversies** - Later scholarship challenged the simplistic interpretation that "anyone" would act this way.

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Show Notes

The Stanford Prison Experiment is one of the most famous studies in psychology, but also one of the most controversial. In this bonus episode, we look at what actually happened in the basement of Stanford University in 1971.

We explore:

  • The landscape of psychological research at the time of the study
  • How participants were selected and assigned roles
  • The theatrical procedure of the study
  • The unexpected outcomes and why it was stopped early
  • Ethical lessons around consent and researcher responsibility
  • Why the study is so influential to our understanding of institutions, power and authority

The Debunking Psychology series: HERE

Watch on Netflix: HERE

Follow Jemma on Instagram: @jemmasbeg

Follow the podcast on Instagram: @thatpsychologypodcast

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For business: [email protected] 

Our favourite sources:
http://pdf.prisonexp.org/ijcp1973.pdf 
https://scholarship.richmond.edu/heroism-science/vol10/iss1/5/ 
https://gen.medium.com/the-lifespan-of-a-lie-d869212b1f62 

The Psychology of your 20s is not a substitute for professional mental health help. If you are struggling, distressed or require personalised advice, please reach out to your doctor or a licensed psychologist. 

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