Vocal Coordination During Early Parent–Infant Interactions Predicts Language Outcome in Infant Siblings of Children with Autism Spectrum Disorder

Jessie B. Northrup · Jana Marie Iverson

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Language Development and Disorders Autism Spectrum Disorder Research Child and Animal Learning Development

Abstract

This study examined vocal coordination during mother-infant interactions in the infant siblings (high risk infants; HR) of children with autism spectrum disorder (ASD), a population at heightened risk for developing language delays. Vocal coordination between mothers and HR infants was compared to a group of low risk (LR; no first- or second-degree relative with ASD) dyads, and used to predict later language development. Nine-month-old infants were videotaped at home playing with their mothers, and interactions were coded for the frequency and timing of vocalizations. Percent infant simultaneous speech was predictive of later language delay (LD), and dyads with LD infants were less coordinated with one another in average latency to respond than dyads with non-delayed (ND) infants. The degree of coordination between mothers and infants on this variable predicted a continuous measure of language development in the third year. This research underscores the importance of understanding early development in the context of interaction.

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References

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2016Multiple Coordination Patterns in Infant and Adult Vocalizations 2019Early language exposure supports later language skills in infants with and without autism 2022A systematic review and Bayesian meta-analysis of the development of turn taking in adult–child vocal interactions 2015Maternal Vocal Feedback to 9‐Month‐Old Infant Siblings of Children with ASD 2022Perspectives on the origin of language: Infants vocalize most during independent vocal play but produce their most speech-like vocalizations during turn taking

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