The Next Web writes about a secret Facebook experiment: “The News Feeds belonging to 689,003 users of the English language version were altered to see “whether exposure to emotions led people to change their own posting behaviors,” Facebook says. There was one track for those receiving more positive posts, and another for those who were exposed to more emotionally negative content from their friends.”
The outcome: “Facebook found that the emotion in posts is contagious. Those who saw positive content were, on average, more positive and less negative with their Facebook activity in the days that followed. The reverse was true for those who were tested with more negative postings in their News Feed.”

Marshall Kirkpatrick found this: “The study was funded in part by … the Army Research Office.”

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