"While nobody can deny that Facebook has altered the landscape of social interaction, particularly among young people, we are just now starting to see solid psychological research demonstrating both the positives and the negatives," Telegraph quoted Larry D. Rosen, professor of psychology at California State University, as saying.
Rosen said the negative effects of teenagers overusing social media include making them more prone to vain, aggressive and anti social behaviour.
Scientists have found pre-teens and teens who overuse social sites and technology on a daily basis are also more likely to be prone to bouts of anxiety, depression and other psychological disorders.
They also found that excessive use of sites like Facebook can also lead to poorer academic performance. Teenagers who checked social networks at least once during a 15 minute study period, achieved lower grades.The findings of the research were presented at the 19th Annual Convention of the American Psychological Association.