1) The study examined differences in how extraverted and introverted people use social networking sites like StudiVZ. It found introverted people have fewer friends and social activities offline but compensate by socializing more online. 2) Introverted people reported similar levels of social behavior online as extraverts, whereas offline extraverts engaged in more social activities. This supports the "social compensation" hypothesis that introverts satisfy affiliation needs through online socializing. 3) However, extraverts still had more online friends and pictures, and used StudiVZ more to stay in touch with large networks, so the "rich-get-richer" idea cannot be completely ignored for extraverts. Overall, online social networks allow