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KMID : 1036820160210020355
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Communication Sciences & Disorders
2016 Volume.21 No. 2 p.355 ~ p.370
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Early Vocalization and Later Phonological and Expressive Vocabulary Development in Children with and without Cleft Palate
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Park Bo-Ra
Ha Seung-Hee
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Abstract
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Objectives: Syllabic vocalization is closely related to the development of verbal language. This study aims to longitudinally examine the development of vocalization, phonology and vocabulary in children with and without cleft palate (CP). The study also investigates the relationship between vocalization and later spoken language.
Methods: The participants were 8 children with CP and 9 typically developing children. Spontaneous utterances collected at 9 and 15 months of age were analyzed regarding vocalization, word production ratios, length, structure, and phonological characteristics of vocalizations. We also analyzed expressive vocabulary and phonological characteristics based on data at 24 months. The correlation between verbal stage utterances and vocalizations prior to and following palatal repair was also examined.
Results: Children with CP showed a smaller consonant inventory than children without CP. Children with CP indicated persistent increases in syllabic vocalizations from 9 to 15 months but still showed delays compared to their noncleft peers. Children with CP have a limited inventory of vocabulary starting with oral pressure consonants, a limited oral pressure consonant inventory, and limited accuracy of initial oral pressure consonants at 24 months of age. Children with CP showed a close relationship between early vocalization at 9 and 15 months and spoken language at 24 months.
Conclusion: Children with CP have deficits in vocal developments, which appear to persist following palate closure and involve restrictions on subsequent speech and lexical acquisition. The study supports the role of vocalization as an important predictor of later speech and language performance.
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KEYWORD
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Cleft palate, Vocal development, Phonological and vocabulary development
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