The sibling relationship is a unique and long lasting relationship for individuals, which contributes to the social development of a child. During childhood and adolescence, the relationship...Show moreThe sibling relationship is a unique and long lasting relationship for individuals, which contributes to the social development of a child. During childhood and adolescence, the relationship between siblings changes especially in the amount of warmth and conflict between them. Previous research shows that the experience of differential parenting can cause feelings of jealousy, which in turn affects the quality of the sibling relationship in forms of less warmth and more physical or psychological aggression. The current cross-sectional study examined the relation between differential parenting and physical or psychological aggression between siblings and the potential moderating role of the warmth within the sibling relationship. The sample consisted of 22 children between 9 and 18 years old and their 19 younger siblings also between 9 and 18 years old. The study used online self-report questionnaires to measure the experienced differential parenting (SIDE), sibling physical and/or psychological aggression (CTS2-SP) and the perceived warmth within the sibling relationship (SRQ-S). The results showed a significant relation between differential parenting and psychical or psychological aggression within the sibling relationship for the youngest siblings. This means that when the youngest sibling is experiencing differential parenting, there also will occur more physical or psychological aggression. This relation remained significant when controlling for warmth between the sibling relationship. This relation was not found for the older siblings, which means that when the older siblings experience differential parenting this will not lead to physical or psychological aggression. No significant moderation effect was found for warmth within the sibling relationship on the relation between differential parenting and physical and/or psychological aggression for both the oldest and youngest siblings. Future research should focus more on the possibilities that sibling relationships can offer, especially which protective role a sibling relationship might have. It is also important that parents become more aware of how their children might experience certain parental behavior and what consequences this might have.Show less
