A recent study has pointed out that Facebook profiles that portray a version of self can have a positive impact on psychological state and influence behavior.

The test pointed out that just five minutes of examining their Facebook profiles helped boost self-esteem.
"If you have high self-esteem, then you can very quickly associate words related to yourself with positive evaluations but have a difficult time associating words related to yourself with negative evaluations," Toma says. "But if you have low self-esteem, the opposite is true."
"Our culture places great value on having high self-esteem. For this reason, people typically inflate their level of self-esteem in self-report questionnaires," she says. "The Implicit Association Test removes this bias."
Source-Medindia