The connections and tensions between siblings may impact the development and well-being that children with ASD and their typically developing (TD) siblings experience. Parenting style and parental stress are two factors that impact a caregiver's ability to effectively foster positive relationships. Finally, the interplay between sibling relationships, caregiver characteristics, sibling involvement in intervention, and success in ASD intervention is of interest. Primary caregivers (N = 108) completed an online questionnaire and a hierarchical multiple regression was conducted. Results indicated: 1) Parenting stress explains 12% of the variance found in the warmth and closeness of sibling relationships; 2) Sibling involvement and success in ASD intervention cumulatively contributes to 13.5% of the variance found in the warmth and closeness of sibling relationships; and 3) warmth and closeness uniquely explains 7% of the variance of success in ASD intervention. Limitations, practical implications, and future research direction will be discussed.
