If you read a news feed other than Facebook, you might have heard that Facebook intentionally manipulated the emotional content of nearly 700,000 users for a week back in January 2012. They wanted to see what the psychological impact would be by substituting negative news for positive news and vice-versa. In essence, they conducted a research experiment that willfully and intentionally caused changes in users’ psychological status. Facebook claims that by using its site you agree to certain terms and conditions – one of which is using your data for research.