Adolescence is a time when there are lots of changes going on for most young people. Especially friends and social connections are important in this period and mostly the quality of friendship....Show moreAdolescence is a time when there are lots of changes going on for most young people. Especially friends and social connections are important in this period and mostly the quality of friendship. During adolescence, young people can also experience (symptoms of) behavior issues. These issues are for example behavior disorders and the disorder ADHD. The goal of this study was to get an insight of the way in which symptoms of ADHD and behavior disorders can influence the degree of friendship quality during early adolescence. Also, there has been looked at the interaction effect between symptoms of ADHD and behavior disorders on friendship quality. For this research, 119 participants between twelve and sixteen years old have filled in online questionnaires, the ADHD self-report questionnaire, the SDQ for behavior issues and the FSQ and NRI for friendship quality. There’s been a multiple hierarchical regression analysis performed in which there was not a significant model and main effect found of symptoms of ADHD and behavior disorders on friendship quality. There was also not a significant effect in the interaction effect of symptoms of ADHD and behavior disorders on friendship quality. This study shows that the results are not aligned with the hypotheses and earlier research and it is of importance that further research takes a different age range into account of adolescents (14-17) in regard to gender and using extended questionnaires in which other context will be integrated as well.Show less