The Impact of Autistic Traits on Joint Attention in Young Children With Down Syndrome During Mother-Child and Father-Child Interactions.

PURPOSE: Joint attention predicts later language in Down syndrome (DS) and autism. The co-occurrence of autism in children with DS is 6%-19%, which is higher than in the general population. However, little is known about how co-occurring autism in DS impacts the development of joint attention. This study compared mother-child and father-child interactions in families of children with DS. Our purpose was to investigate differences in caregiver joint-attention bids and whether caregiver and child joint attention were associated with autistic traits and receptive language in children with DS.

METHOD: Fifteen children with DS (Mage = 39.67 months) and their biological caregivers participated in the current study. We collected mother-child and father-child interactions in participant's homes. Using Wilcoxon signed-ranks tests, we examined if there were differences in mothers' and fathers' joint attention bids and if children responded differently to their bids. We used Spearman correlations to examine the associations between child autistic traits, receptive language, and caregiver and child joint attention.

RESULTS: We found that mothers initiated more joint-attention bids than fathers but did not find differences in child responsiveness or initiations based on communication partner. Mothers used more bids when children had more autistic traits. Child autistic traits were negatively correlated with child responsiveness to father joint-attention bids. Children with more autistic traits produced fewer joint-attention bids with both caregivers.

CONCLUSIONS: Findings suggest mothers and fathers may use differing approaches to support their child's language development. Regardless of communication partner, children with more autistic traits engaged in fewer instances of joint attention.