This is a striking example of how something seemingly small as what appears on your newsfeed CAN influence your actual BEHAVIOURS AND ACTIONS.

Facebook Ran A Huge Psychological Experiment On Users And Manipulated The Emotions Of More Than 600,000 People

http://www.pnas.org/content/early/2014/05/29/1320040111.full.pdf

Facebook’s data scientists conducted a massive experiment where it messed with people’s feeds and proved that longer-lasting moods, like happiness or depression, can be transferred across the social network.

The company tweaked the Newsfeed algorithms of 689,003 unwitting Faceboo ...

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