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Abstract
The aim of the study was to determine whether there are relationships between the family system of origin, i.e. the structure of the family and the parenting styles, and aggression in the final stages of adolescence. 60 people (30 girls and 30 boys) were examined using the following methods: A.H. Bussa and A. Durkee Questionnaire to study aggressiveness and the Questionnaire of the M. Ryś Family Environment Analysis - Family of Origin (FO) to examine the family system including the structure of the family and the parenting styles.
The following interdependencies were observed: there is no significant difference in the level of aggression between girls and boys, however, there is a variety of types of aggression between the sexes. The authoritarian family correlates significantly positively with all types of aggression and most with irritability and guilt among girls. The overprotective family correlates significantly positively with all types of aggression and most often with trauma. The authoritarian family correlates significantly positively with the occurrence of all types of aggression, and most with irritability and guilt among boys. A chaotic family correlates significantly positively with all types of aggression, and especially with negativity and irritability. A normal family negatively correlates with all types of aggression. In the perception of the surveyed girls and boys, there is a positive and statistically significant relationship between autocratic and liberal-non-loving parenting styles and the occurrence of aggressive behaviour. The autocratic style positively correlates with physical, verbal, indirect aggressiveness, negativity, mistrust, resentment, irritability and guilt, while the liberal-unloving style positively correlates with physical, verbal, indirect aggressiveness, negativity, mistrust, resentment, irritability and guilt. The democratic style correlates positively with one type of aggression: verbal aggressiveness, and negatively with other types of aggression.