Sad people posted more faces on their feed than happy folks, but each photo had fewer faces and not necessarily because sad people had fewer friends. The depressed tend to use personal language including "I" and "me," so "something similar could explain the 'sad selfie' hypothesis," says author Andrew Reece, a psychology and computational science grad student at Harvard.
Lots of Comments
Bummed-out posters got fewer hearts but more words. The authors aren't sure why, but sad photos may elicit more comments since a "like" is often a sufficient reaction to a positive photo, while "comments can be questioning and concerned," which may be more fitting for negative images, says Reece.