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A LONGITUDINAL STUDY ON THE DEVELOPMENT OF SPEECH IN CHILDREN Yasuko Nakanishi 1 pp.393-409
Published Date 1969/6/20
DOI https://doi.org/10.11477/mf.1492207298

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  • Abstract
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 The speech development was studied longitudinally in about fifty children from 1 to 3 years of age. Utterances made by the child in its ordinary home environment were taperecorded for 1 hour a day. Such a recording was repeated once a month from the age of 1 until the child reached the age of 2 years and 6 months. Thereafter, the procedure was carried out once every 3 months until the child reached the age of 3.

 The data obtained from 17 subjects were analysed and were describedar on the following points: the classification of utterrances, the vocabulary development and the development in sentence construction.

 The results showed that the communicating ability made a marked development during the age of 2 and 3 in 15 children. At the age of 2, the individual differences in both vocabulary and sentence construction varied to a large extent. Those who developed slowly to the age of 2, however, finally caught up with the faster ones when the age 3 was reached. The increment of vocabulary was two to ten times. Sentence utterances were found to be 60 to 70 per cent of the total utterances recorded and the frequency in which function words were used increased at the age of 3.

 In this study group there were two exceptions,one with speech retardation in parallel with retardation in over-all mental development, and the other with delay in motor development but with neither gross mental retardation, nor hearing loss. The developmental processes of the latter case were reviewed and discussed.


Copyright © 1969, 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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