We present results from a cross-sectional study of the entire adolescent student population aged 12-18 of the island of Kos and their parents, on Internet abuse, parental bonding and parental online security practices. We also compared the level of over involvement with personal computers of the adolescents to the respective estimates of their parents. Our results indicate that Internet addiction is increased in this population where no preventive attempts were made to combat the phenomenon from the initial survey, 2 years ago. This increase is parallel to an increase in Internet availability. The best predictor variables for Internet and computer addiction were parental bonding variables and not parental security practices. Parents tend to underestimate the level of computer involvement when compared to their own children estimates. Parental safety measures on Internet browsing have only a small preventive role and cannot protect adolescents from Internet addiction. The three online activities most associated with Internet addiction were watching online pornography, online gambling and online gaming.

Cyberbullying frequency with regards to both victims and victimizers was high and associated with online impulsiveness, pointing to the possible existence of some commonalities. Further research is necessary to ascertain common underlying psychological factors and neurobiology.

We present results from a cross-sectional study of the entire adolescent student population aged 14 to 18 years of the island of Kos, on the correlates between personality, illicit chemical substance use, and Internet abuse. Results demonstrate that adolescents who have used illicit substances and are abusing the Internet as well appear to share some common personality characteristics, namely those that are classified under the label of "psychoticism" in the Eysenck's personality model. An increase in the severity of pathological Internet use has been linked to increased chances of having used an illicit substance. Taking into account any common personality attributes, Internet addiction can still be useful as a predictor variable for substance use experiences. Future research should attempt to verify any biological common factors between chemical substances use and Internet abuse. Targeting the adolescent population that engages in increased Internet use may be of benefit for drug abuse prevention programs.