The report revealed that only 14 percent of teens said they blogged in 2009, down 28 per cent in 2006.

The number of adolescents who reported having commented on blogs in communities of online social networking has sunk to 52 percent from 76 percent three years ago.

“Youth in May to an exchange of macro-blogging” for micro-blogging with updates of state, “the study authors said, referring to the popularity of sharing updates of life in terse text messages.

Devotion to the blogs did not disappear in adults, with about one in ten adults keeping online journals or blogs in a report that has not changed since 2005, according to the Pew report.

But the number of people aged 18 to 29 blogging has fallen to 15 per cent in 2009 against 24 percent two years ago.

Meanwhile, 11 percent of people aged 30 or older said they were blogging in 2009 compared to seven per cent in 2007.

Social networking has gained popularity among teenagers, with 73 percent claiming to online communities. However, adolescents reported that they reduced the sending daily messages to friends via social networks.

Music-based social networking service MySpace has attracted a younger crowd, while Facebook is more popular with older people, according to Pew.

The teenagers were also found to be the main users of nearly all applications online, except for the microblogging service Twitter.

Only eight percent of Internet users aged 12 to 17 reported using Twitter, but nearly two thirds have used SMS to communicate.

Young adults were heavier users of Twitter, including one third of people aged 18 to 29 viewing or reading the “tweets”, according to Pew.