Facebook emotion experiment sparks criticism

Facebook is facing criticism after it emerged it had conducted a psychology experiment on nearly 700,000 users without their knowledge.


The test saw Facebook "manipulate" news feeds to control which emotional expressions the users were exposed to.
The research was done in collaboration with two US universities to gauge if "exposure to emotions led people to
change their own posting behaviours".

Facebook said there was "no unnecessary collection of people's data".
"None of the data used was associated with a specific person's Facebook account," the social networking giant added.
Cornell University and the University of California at San Francisco were involved in the study.