Originally posted on TIME:
Did your Facebook News Feed seem a little too happy, or perhaps a little too depressing, for one week in January 2012? That may have been because researchers were experimenting with your News Feed to figure out more about how humans’ emotions work when we’re physically apart.
By tweaking the Facebook News Feed algorithm and studying nearly 700,000 Facebook users’ posts, Facebook’s data scientists and researchers found that emotional states can be transmitted between people without face-to-face interaction, according to a study published earlier this month.
For the study, published in the Proceedings of the National Academy of Sciences, researchers analyzed over 3 million posts containing over 122 million words and used an algorithm to characterize the language as positive or negative. Facebook’s data team then adjusted the amount of positive or negative Facebook language users were exposed to on their News Feeds to see how they would…
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