Given the uniqueness of siblings, it is important to consider the presence and role of relational aggression within the sibling relationship. Due to the time spent together and the information disclosed between siblings, during conflict, such information could be used in threatening or relationally aggressive ways. Relationally aggressive actions do not pose a threat to end the sibling relationship, making it a safe relationship to practice such strategies. While parents are likely to be aware of physical aggression between siblings, and attempt to stop it, relational aggression may be difficult for parents to catch and address, reinforcing its effectiveness as a strategy of control. This chapter describes the developmental course of relational aggression within the sibling relationship, as well as associations between relational aggression in the sibling relationship and relationships with others. Finally, we highlight the conclusions and limitations of this research and offer ideas for future research directions.
