Objectives: To investigate the effects of autism on the parent report of a TD child with an ASD sibling. Furthermore, to investigate whether the autism sibling group differs significantly than the TD sibling group on self-reports of internalizing symptoms.
Methods: 10 TD children (5 in ASD sibling group, 5 in TD sibling group) were matched on birth order, age (M = 149.4 (20.0)), and IQ (M = 109.0 (8.763)). Parents completed the SCQ and each participant completed the PAES-III.
Results: Preliminary analyses indicate a significant difference between the two sibling groups on the SCQ Communication Domain, F(1) = 10.8, p < 0.05 and the SCQ total score, F(1) = 6.77, p < 0.05. Parents from the autism sibling group reported significantly lower on the SCQ Communication Domain and the SCQ total score than caregivers of the TD sibling group. Further analyses indicated a significant difference between the two groups on the PAES-III Anger-In Domain, F(1) = 6.00, p < 0.05. The autism sibling group reported significantly higher than the TD sibling group.
Conclusions: Preliminary analyses suggest that parents of the autism sibling group may under report when asked to complete diagnostic measures for their neurotypical child. This implies that the presence of autism in one child may affect the way parents report symptomotology in their TD child. Additionally, siblings of ASD children self-reported greater internalizing symptoms than the TD sibling group.