To Facebook, we are all lab rats. Facebook routinely adjusts its users news feeds - testing out the number of ads they see or the size of photos that appear - often without their knowledge. It is all for the purpose, the company says, of creating a more alluring and useful product. But last week, Facebook revealed that it had manipulated the news feeds of over half a million randomly selected users to change the number of positive and negative posts they saw. It was part of a psychological study to examine how emotions can be spread on social media.
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