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KMID : 1036820150200020165
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Communication Sciences & Disorders
2015 Volume.20 No. 2 p.165 ~ p.177
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A Longitudinal Study of the Acquisition of English Speech Sounds by a Minimally Verbal Child with Autism Spectrum Disorder: A Case Study
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Kim Min-Jung
Seung Hye-Kyeung
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Abstract
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Objectives: Information regarding the acquisition of speech sounds of children with autism spectrum disorder (ASD) is lacking in the literature. The present study examines the English speech sound acquisition of an 11-year-old child with severe speech impairment secondary to ASD, who was minimally verbal and had a significantly delayed onset of speech as late as seven years; the child was exposed to Korean and English at home but spoke English as a primary language both at home and school.
Methods: Data was collected monthly over a one-year period along with two additional sets of follow-up data (6 months and 20 months after the one-year study period). Phonetic and phonological characteristics of single word production were examined through analysis of the phonetic inventory, percentage of consonants correct (PCC), and typical/atypical error patterns.
Results: Results show that PCC increased approximately 10% over a year. The child’s phonetic inventory was relatively large when compared to his low PCC. His most common error patterns were cluster reduction, final consonant deletion, and stopping. The child also produced a number of atypical error patterns (especially backing). The 20-month follow-up data indicated a continuous decrease of final consonant deletion and stopping as well as an additional 13% increase in PCC.
Conclusion: Results of the current study suggest that minimally verbal children with ASD can continue to develop speech sounds despite severe impairment and significantly delayed onset in producing speech sounds.
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KEYWORD
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Minimally verbal, Autism spectrum disorder, Speech sound acquisition
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