The Debbie Downers in your Facebook News Feed are messing with your mood.
A team of social scientists from Cornell University, the University of California, San Francisco and Facebook released a study detailing how your emotions expressed in posts and status updates can actually “spread” to your friends.
See also: Facebook Is Trying to Be Less Creepy
The team randomly selected 689,003 of Facebook’s 1.3 billion total users, and manipulated their News Feeds. Some experienced a reduced amount of positive news on their feeds, while others experienced a reduced amount of negative news
Users with reduced positive news began to use more negative words, and users with reduced negative news used more positive words, according to Jeff Hancock, a professor at Cornell’s College of Agriculture and Life Sciences and co-director of its Social Media Lab. …