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Researchers at Facebook ran an experiment on nearly 700,000 randomly chosen users to see if their overall emotional state could be manipulated by the types of posts they see in their feeds.
Think Progress reported on a scientific paper published on Friday in the Proceedings of the National Academy of Science (PNAS) entitled “Experimental evidence of massive-scale emotional contagion through social networks” in which the researchers concluded that it is not just possible but very easy to drive emotional responses in users by controlling the content that they see.
Users of the social media platform consented to be experimented on by developers and researchers when they signed the Terms and Conditions necessary to open a Facebook account.