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. 2011 Apr;41(4):405-26.
doi: 10.1007/s10803-010-1117-5.

The hypothesis of apraxia of speech in children with autism spectrum disorder

Lawrence D Shriberg  1 , Rhea Paul, Lois M Black, Jan P van Santen
Affiliations

The hypothesis of apraxia of speech in children with autism spectrum disorder

Lawrence D Shriberg et al. J Autism Dev Disord. 2011 Apr.

Abstract

In a sample of 46 children aged 4-7 years with Autism Spectrum Disorder (ASD) and intelligible speech, there was no statistical support for the hypothesis of concomitant Childhood Apraxia of Speech (CAS). Perceptual and acoustic measures of participants' speech, prosody, and voice were compared with data from 40 typically-developing children, 13 preschool children with Speech Delay, and 15 participants aged 5-49 years with CAS in neurogenetic disorders. Speech Delay and Speech Errors, respectively, were modestly and substantially more prevalent in participants with ASD than reported population estimates. Double dissociations in speech, prosody, and voice impairments in ASD were interpreted as consistent with a speech attunement framework, rather than with the motor speech impairments that define CAS.

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Figures

Figure 1
Figure 1
Percentage of positive indices of Childhood Apraxia of Speech (CAS) and Motor Speech Disorder-Not Otherwise Specified in participants with Autism Spectrum Disorders (ASD) compared to participants with CAS.
Figure 2
Figure 2
Prosody-voice findings for participants with Autism Spectrum Disorders (A) compared to participants with Typical Development (T), Speech Delay (S), and Childhood Apraxia of Speech (C).
See this image and copyright information in PMC

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