It's difficult to estimate the number of youngsters involved in home schooling where children are not sent to school and receive their formal education from one or both parents.
While most parents, teachers and clinicians would react to an adolescent using drugs or getting drunk, they may easily overlook teenagers who are engaging in inconspicuous behaviors.
The researchers conclude that electronic communication was the only adolescent activity that increased at the same time psychological wellbeing declined.
Another study of high school social networks found less bullying and aggression the higher the density of mixed-sex friendships within a given adolescent network.