Abstract (eng)
Siblings of children and adolescents with a mental disorder are exposed to stressful and challenging conditions when growing up. In order to better understand the effects of these conditions, this study compares the siblings perceptions of the quality of the relationship to their siblings and their problem behaviour (internalizing and externalizing behaviour), to the norm data and the parents' report on these variables. Furthermore, the relation between the quality of the sibling relationship and problem behaviour is examined.
The examined sample consists of 21 siblings (aged 10-18) of children and adolescents with a mental disorder in psychiatric treatment as well as their parents (n = 21). The quality of the sibling relationship was assessed with the Sibling Relationship Questionnaire (SRQ). The problem behaviour was measured by the Youth Self-Report (YSR) and the Child Behavior Checklist (CBCL). In addition, a psychiatric diagnosis of the siblings was conducted using the Diagnostic Interview for Psychological disorders in childhood and adolescence (Kinder-DIPS).
Compared to the norm sample of the SRQ, the siblings of children and adolescents with a mental disorder did not perceive their sibling relationship significantly more negative or to be more burdened (high scores of warmth and low scores of conflict). The participants rated their sibling relationship significantly warmer than their parents. Regarding the internalizing behaviour, there was no significant difference compared to the norm data of the YSR nor to the parents' reports (CBCL). With regard to the externalizing behaviour, significantly lower values were found compared to the normative means of the YSR. In terms of the examined association between the sibling relationship and problem behaviour, the conflict factor was a significant predictor of the self-reported internalizing behaviour of the siblings. The higher the conflict values were estimated by the siblings, the less internalizing behaviour was reported by them.
These results imply that growing up with a brother/sister with mainly internalizing disorders does not in principle represent a development hazard and a close and loving sibling relationship with their siblings is possible, despite the strain. Future research based on a larger sample size and a comparison with a healthy control-group is highly recommended.