Experience matters: Caregiver interactions with later-born toddlers with autism

Caregiver-child interactions are critical for supporting early social communication in toddlers showing signs of autism. This study examined whether prior experience parenting an autistic toddler influences how caregivers interact with younger siblings. During a free play interaction, caregivers were rated on the developmental appropriateness and quality of strategies such as: caregiver support for toddler's dyadic social engagement (e.g., engagement/regulation and use of environmental strategies), imitation and modeling (e.g., turn-taking), and play support (e.g., modulating play to toddler's level). Additionally, we coded caregiver responsiveness to the toddler's nonverbal and verbal communication. Specifically, we explored whether caregiver strategy use and responsiveness to toddler communication differed between caregivers who already had an older child with autism and those who did not. Participants were 115 caregiver-toddler dyads (M age = 20 months) showing features of autism, grouped by sibling status: older autistic sibling (EL-Sibs, n = 23), a non-autistic sibling (LL-Sibs, n = 34), or were first-borns (FB, n = 58). Binary logistic regressions examined strategy use and responsiveness, controlling for toddler age, developmental level, toddler ADOS scores, and family annual household income. Sibling status significantly predicted play-related strategies but not dyadic social engagement or imitation/modeling strategies. Caregiver responsiveness was not associated with sibling status; however, child age, developmental level, and higher family income were associated with higher quality responsiveness. Findings suggest that prior autism-related parenting experience may positively shape certain caregiving behaviors with later-born siblings, specifically within play-based interactions.