Phonological Impairment in Developmental Language Disorders-In Cases of Developmental Dyslexics.

DOI 13 Citations 13 References Open Access
  • Oishi Noriko
    Department of Speech-Language Pathology and Audiology
  • Saito Sawako
    Speech, Language and Hearing Center, International University of Health and Welfare Clinic

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Other Title
  • 言語発達障害の諸相　　言語発達障害における音韻の問題　　読み書き障害の場合
  • —In Cases of Developmental Dyslexics—
  • ―読み書き障害の場合―

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Seven cases (7 to 12 years of age, 6 males and 1 female) of developmental dyslexics with normal intelligence and without marked speech or language problems were given a battery of tests consisting of seven items, covering phonology, semantics, syntax and verbal memory. The results were compared to those for non-reading-retarded children matched to each subject's school grade.<BR>It was found that: (1) each subject's results for test items measuring phonological awareness (word reversals and mora-counting) were far below results (-1 SD) of the control group; (2) each subject's results for test items measuring semantic comprehension (answer-ing riddles) were within the normal limit; (3) confrontation naming of objects, colors and actions showed a categorical effect which was not observed among the controls; (4) comparison of the results for the two kinds of word retrieval tasks (first, retrieving words that begin with a certain mora-sound, like /ka/; second, retrieving words that belong to a certain category of meaning, like 'animal') showed a discrepancy in the number of words retrieved in the two tasks, that is, the number of words with a mora-sound retrieved was inferior to that of words with a categorical meaning, and such discrepancy was not observed among the controls.<BR>Results (1) and (4) mentioned above indicated that the seven dyslexic subjects had a developmental delay in phonology. The relationship between reading and phonological development has been confirmed among normal and dyslexic children in English and other languages. The results of this study indicated that development of phonology plays an important role in learning Hiragana as well.

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