The "Zentrum für empirische pädagogische Forschung" at the University of Landau published a survey about the importance of computer games in the every day life of children and youths. 784 young people in the age of 9 to 20 years were asked to provide information about their life situation and their playing of computer games via an online questionnaire.
The study defines players who play more than two hours at school days at least 3-4 times a week and in addition show symptoms of addiction as pathological players. The study proves that these players are more often unable to cope with their present life situation and feel less integrated than other players. The computer has an overcoming function for them to regulate or to suppress negative emotions.
Download (PDF) of the survey results in German language can be found here.