Several psychologists said they used the site casually to assess their patients. "Facebook can be a tool to study human behaviour, and it often helps me assess the person's personality," said Seema Hingorrany, a clinical psychologist.
Hingorrany said one of the obvious psychological signs on the social networking site was the frequency with which people changed their profile photos. "People who are very enthusiastic on Facebook and change their photos every few hours, show a more extroverted personality, but may not necessarily be attention-seeking, while some are very guarded and don't change their photos for a very long time, and may fear being judged by others," she said.
Psychologists said that abusive or disturbing status updates can also reflect the person's state of mind. In October last year, a city student had committed suicide after putting up a suicide note on Facebook.