Facebook Experiment Angers Many Users - KALB-TV News Channel 5 & CBS 2

Facebook Experiment Angers Many Users

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(NBC)  Facebook is under fire for conducting a secret mood test on thousands of users.

Facebook along with researchers at three universities conducted the experiment in early 2012. They manipulated news feed content to see how users would emotionally react to the posts. The study found that users that were shown more negative content were slightly more likely to write negative posts. Users in the positive group responded with more upbeat posts.

Facebook's term of service gives the company permission to conduct this kind of research, but many users have reacted with anger at what they say is a dangerous social experiment.

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