People who spend a lot of time on the internet are more likely to be depressed, lonely and mentally unstable, a study found.

A study has shown that the more someone uses Facebook, the less satisfied he is with life.   Kross E, Verduyn P, Demiralp E, Park J, Lee DS, Lin N, et al. (2013) Facebook Use Predicts Declines in Subjective Well-Being in Young Adults. PLoS ONE 8(8): e69841. https://doi.org/10.1371/journal.pone.0069841

The study participants who are more active on Facebook, showed less need to share, to help others, and society.

They showed greater selfishness. Wen Bin Ch., Szu-Wei Ch,. Da-Chi L. (2013) Does Facebook Promote Self-Interest? Enactment of Indiscriminate One-to-Many Communication on online Social Networking Sites Decreases Prosocial Behavior. Cyberpsychology, doi: 10.1089/cyber.2013.0035