Facebook conducted secret psychology experiment on users' emotions
Facebook conducted secret psychology experiment on users' emotions Facebook has conducted a secret massive psychology experiment on its users to find out how they respond to positive and negative messages - without telling participants By Harriet Alexander 12:00PM BST 28 Jun 2014 Over 600,000 Facebook users have taken part in a psychological experiment organised by the social media company, without their knowledge. Facebook altered the tone of the users' news feed to highlight either positive or negative posts from their friends, which were seen on their news feed. They then monitored the users' response, to see whether their friends' attitude had an impact on their own. "The results show emotional contagion," wrote a team of Facebook scientists, in a paper published by the PNAS journal - Proceedings of the National Academy of Scientists of the United States. "When positive expressions were reduced, people produced fewer