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In 1971, this social experiment was so traumatizing that three participants were released after four days:

Retry Correct Incorrect The Stanford Prison Experiment was a social psychology experiment conducted at Stanford University in 1971 where students become prisoners in a simulated prison. The “prisoners” were treated poorly, and three participants were released four days into the experiment. Scientists canceled the investigation two days later.

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In 1971, this social experiment was so traumatizing that three participants were released after four days:

• The Stanford Marshmallow Experiment
• Asch Conformity Experiment
• The Stanford Prison Experiment
• Hawthorne Experiment