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LONGITUDINAL STUDY ON THE DEVELOPMENT OF SPEECH IN CHILDREN (5): A CASE WITH DELAYED ONSET OF SPEECH Yasuko Nakanishi 1 pp.97-115
Published Date 1971/2/20
DOI https://doi.org/10.11477/mf.1492207592
  • Abstract
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 Among the 50 subjects whose speech development was studied longitudinally from one year to three years of age, there was a boy with normal hearing, intelligence and speech comprehension, without any motor incoordination or emotional problems who developed scarcely any speech untill three years of age. The developmental processes of this boy from 14 months to his four years of age were reported and discussed.

 During his speechless period he communicated with jestures. Nonsense syllables and echoic utterances were scarcely heard.

 Between 32 months and 38 his vocabulary increased slightly and at 39 months, the first spurt of vocabulary increase was observed. The coming vocabulary was in the adult language form without many articulation errors. Various parts of speech appeared nearly at once. Sentence utterances appeared at 39 months and increased rapidly with functional words. At 42 months he practically caught up with other children.

 The echoic utterances increased almost in parallel with the increase in vocabulary. At 41 months it reached its peak, after which it decreased.

 The significance of the peak in echoic utterances and also of the percentage of core words used by the subject in the total core vocabulary for indicating the developmental language level was discussed.


Copyright © 1971, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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