Facebook's Secret Psychological Experiment

The video discusses a controversial Facebook experiment conducted in 2012, where users' newsfeeds were manipulated to study emotional contagion. The experiment involved 683,000 users without their knowledge, and results showed a minimal effect on users' emotions. Public reaction focused more on the ethics of the experiment than the findings. Legal concerns were raised about informed consent. Similar experiments by Facebook and Google are common, raising questions about regulation and the definition of human experimentation.

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