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Out of the Mouths of Babes: Vocal Production in Infant Siblings of Children with ASD
In: Communication Disorders Faculty Publications (2011)
Abstract: Background: Younger siblings of children with autism spectrum disorders (ASD) are at higher risk for acquiring these disorders than the general population. Language development is usually delayed in children with ASD. The present study examines the development of pre-speech vocal behavior in infants at risk for ASD due to the presence of an older sibling with the disorder. Methods: Infants at high risk (HR) for ASD and those at low risk, without a diagnosed sibling (LR), were seen at 6, 9, and 12 months as part of a larger prospective study of risk for ASD in infant siblings. Standard clinical assessments were administered, and vocalization samples were collected during play with mother and a standard set of toys. Infant vocal behavior was recorded and analyzed for consonant inventory, presence of canonical syllables, and of non-speech vocalizations, in a cross-sectional design. Children were seen again at 24 months for provisional diagnosis. Results: Differences were seen between risk groups for certain vocal behaviors. Differences in vocal production in the first year of life were associated with outcomes in terms of autistic symptomotology in the second year. Conclusions: Early vocal behavior is a sensitive indicator of heightened risk for autistic symptoms in infants with a family history of ASD.
Keyword: Autism; Autistic children; Autistic siblings; Child Psychology; First and Second Language Acquisition; Infants; Risk factors; Speech; Speech Pathology and Audiology; Verbal development; Verbalization
URL: https://digitalcommons.sacredheart.edu/cgi/viewcontent.cgi?article=1005&context=speech_fac
https://digitalcommons.sacredheart.edu/speech_fac/6
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2
Autism in infancy and early childhood
In: Annual review of psychology. - Palo Alto, Calif. : Annual Reviews Inc. 56 (2005), 315-336
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