The stereotype of an internet addict is a slightly nerdy young man or teenager, spending all his time in front of some kind of online role-playing game.
The problem is that many parents have not yet tuned in to the addiction danger, warns Werner. They are more prone to sound the alarm when children - primarily boys - show signs of addiction. The signs parents would note for online addiction are the same for girls on social networking sites as for boys involved in online gaming. "For one thing, there's a loss of control," says Werner. "I can no longer control how long I stay on the internet."