It’s a no-brainer that positive posts make people feel good and negative rants make people mad, but you probably had no idea how long the effects of those negative rants last. According to researchers at the University of California-Davis, positive posts last for just a few seconds, but negative rants produce a stream of negativity that goes on for many minutes.
But here’s where it gets interesting … seems those negative rants have a negative effect on the original poster. “It’s not just that this negative chat has a long life,” said study author Seth Frey. “But it has a longer effect on the original speaker. Negative people are really hurting themselves.”
Basically there is such a thing as social media karma. When someone sends out a positive message, it creates good feelings that return to the sender. But when people send out negative or angry messages, it creates negative feelings that ultimately come back to the original poster.