Facebook Manipulated 689,003 Users' Emotions For Science

Facebook's data scientists manipulated the News Feeds of 689,003 users, filling them with either positive posts or negative posts or posts devoid of sentiment in order to see how it affected their moods.

28 Jun 2014 ... The experiment ran for a week -- January 11–18, 2012 -- during which the hundreds of thousands of Facebook users unknowingly participating ...

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