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Acoustic Analysis of Prelinguistic Vocalizations in Toddlers with Autism Spectrum Disorder |
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Elizabeth Schoen - Yale Child Study Center
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Rhea Paul - Southern Connecticut State University, Yale Child Study Center
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Katarzyna Chawarska - Yale Child Study Center
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Ami Klin - Yale Child Study Center
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Fred Volkmar - Yale Child Study Center
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| SRCLD Year: |
2007 |
| Presentation Type: |
Poster Presentation |
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(na) |
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| - Developmental Disabilities |
| - Language Acquisition |
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Previous research examining early vocal productions of children with autism spectrum disorder (ASD) has focused on perceptual analyzes of early developing vocalizations. This study was designed to acoustically analyze prelinguistic vocalizations of toddlers, 18-36 months, with ASD and compare their vocalizations to typically developing (TD) age-matched peers. Children were audio recorded during administration of the Communication and Symbolic Behavior Scales. The audio recordings were analyzed using Multi-Speech Signal Analysis Workstation software. Data on duration of vocalizations, pitch contour and formant frequency production were collected. Results reveal significant differences between diagnostic groups. The ASD group produced significantly more complex pitch contours than the TD group. Formant frequencies produced by the ASD group were significantly lower than those produced by the TD group. Although subjects in the ASD group are vocalizing, their vocal productions are dissimilar to that of typically developing peers. Clinical implications of these findings are discussed.
This study was made possible through the STAART Center grant U54 MH66494 funded by the National Institute on Deafness and Other Communication Disorders. |
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