title: Behavioral and physiological responses to child-directed speech of children with autism spectrum disorders or typical development.
abstract: Young boys with autism were compared to typically developing boys on responses to nonsocial and child-directed speech (CDS) stimuli. Behavioral (looking) and physiological (heart rate and respiratory sinus arrhythmia) measures were collected. Boys with autism looked equally as much as chronological age-matched peers at nonsocial stimuli, but less at CDS stimuli. Boys with autism and language age-matched peers differed in patterns of looking at live versus videotaped CDS stimuli. Boys with autism demonstrated faster heart rates than chronological age-matched peers, but did not differ significantly on respiratory sinus arrhythmia. Reduced attention during CDS may restrict language-learning opportunities for children with autism. The heart rate findings suggest that young children with autism have a nonspecific elevated arousal level.
authors.affiliation: Division of Speech and Hearing Sciences, CB# 7190, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7190, USA. lwatson@med.unc.edu
authors.forename: Linda R
authors.initials: LR
authors.lastname: Watson
authors.forename: Jane E
authors.initials: JE
authors.lastname: Roberts
authors.forename: Grace T
authors.initials: GT
authors.lastname: Baranek
authors.forename: Kerry C
authors.initials: KC
authors.lastname: Mandulak
authors.forename: Jennifer C
authors.initials: JC
authors.lastname: Dalton
mesh_terms: D001288:Attention / Q000502:physiology*; D002652:Child Behavior / Q000502:physiology* / Q000523:psychology; D002659:Child Development Disorders, Pervasive / Q000503:physiopathology* / Q000523:psychology; D002675:Child, Preschool; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D007802:Language; D008297:Male; D011597:Psychomotor Performance / Q000502:physiology; D012119:Respiration; D013060:Speech / Q000502:physiology*
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