![Facebook's Sheryl Sandberg says sorry over social research revelations](https://cdn.i.haymarketmedia.asia/?n=campaign-india%2fcontent%2f20160517232349792591_sheryl.jpg&h=570&w=855&q=100&v=20170226&c=1)
Facebook's Sheryl Sandberg says sorry over social research revelations
Experiment part of ongoing research to test products, but was poorly communicated, says the Facebook COO
![Facebook's Sheryl Sandberg says sorry over social research revelations](https://cdn.i.haymarketmedia.asia/?n=campaign-india%2fcontent%2f20160517232349792591_sheryl.jpg&h=570&w=855&q=100&v=20170226&c=1)
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