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The purpose of this study was to examine the relationships amongst aggression, self-theory, loneliness, and depression. The study group consisted of 904 student volunteers from various undergraduate programs of a university in Central Anatolia. Simple and hierarchical multiple linear regression analyses, as well as t-tests, were used to analyze the data. In the preliminary analysis performed, females' depression levels and males' aggression levels are higher. The study findings revealed that self-theory negatively and significantly predicted aggression, whereas loneliness and depression positively and significantly predicted aggression in emerging adulthood. Another important finding showed that both direct and indirect relationships exist between self-theory and aggression. According to these findings, loneliness and depression play partially mediating roles individually, and fully mediating roles together, with regard to the relationship between self-theory and aggression.
Yavuzer et al. (Fri,) studied this question.