Article from the website rt.com.
Facebook conducted a psychological experiment on its users by manipulating their emotions without their knowledge, a new study reveals.
Researchers toyed with the feelings of 689,003 randomly selected English-speaking Facebook users by changing the contents of their news feed, according to a paper published in the June edition of the journal 'Proceedings of the National Academy of Scientists' (PNAS).
During a week-long period in January 2012, researchers staged two parallel experiments, reducing the number of positive or negative updates in each user's news feed.
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