Did Facebook study go too far?

NEW YORK (CNN) – Facebook conducts a controversial study on users without their knowledge or permission. The social media giant manipulated the content of hundreds of thousands of users in 2012.

The results of the experiment, conducted by researchers from Cornell, the university of California, San Francisco and Facebook, were published this month in the Journal Proceedings of the National Academy of Science.

Watch the video above to see a full report from CNN’s Laurie Segall who explains how big tech companies are using your personal information and why.

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