Use Facebook a lot? Well then you're probably narcissistic, insecure, or both, according to a new study. Researchers had 100 young adults take tests designed to measure their narcissism levels, and asked them about their Facebook habits—and found a correlation: Those who scored higher on the test checked the site more often than those who did not. But the study also found that those lacking self-esteem checked their page more often than "normal," too.
The two seemingly contradictory traits are actually thought to be related, the Daily Mail reports. Interestingly, the study also found that men tend to brag via written posts, while women do so through pictures. (Read more Facebook stories.)