This work starts from Blos (1979, according Špelić, 2007) understanding that the process of 'other separation-individuation' has a significant part in the success of the overall adolescent development. In this concept, adolescent development is determined by the success of young people in confronting and overcoming the experience of "psychological separation" in which parents have an important role in the quality of the emotional relationship. This process during adolescent development is manifested in the emergence of 'dependency crisis', whose failure to master can be one of the causes of addictive behavior of young people. The purpose was to (1) examine gender diversity of young people in adolescence due to the process of other separation-individuation, than (2) examine changes in young people during adolescent development due to the process of other separation-individuation and (3) examine the relationship between the success of the process of other separation-individuation and dependence on video games. Given results confirms the existence of (1) sexual diversity during adolescent development considering of emotional connection of the young people with their parents as well as in the way of mastering the experience of separation. This difference is recognized through a greater connection of girls with mothers than boys. In the way of mastering an experience of separating the girls expressed separation anxiety while in boys denial is a defense from the separation anxiety. The results confirm the existence of (2) changes during adolescent development in emotional relationships with parents, the way of mastering the experience of separation and the level of self-concept determinate with the process of separation-individuation. The younger age group showed significantly higher separation anxiety which reduces with development followed by positive changes in young people in the experience of self-concept. Given the occurrence of dependence on video games there was obtained confirmation of the existence of (3) connection between addiction with success of process of other separation individuation during adolescent development. Young people with a tendency to addiction to video games show poor emotional relationship with both parents and in the field of mastering with the experience of separation is shown a greater presence of negation and failure in the development of mature independence. All these characteristics are conected to their lower level of development of self concept.