Though "correlation vs causation" should be noted here. It may just be that people that are already depressed use Facebook more, instead of Facebook actually making you depressed.

> Lead author Lui yi Lin, B.A., who will be graduating from the University of Pittsburgh School of Medicine this spring, emphasized that, because this was a cross-sectional study, it does not disentangle cause and effect.

> “It may be that people who already are depressed are turning to social media to fill a void,” she said.