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pp.603-607
Published Date 1963/8/20
DOI https://doi.org/10.11477/mf.1492203085

One hundred and thirty infants were closely observed for their natural progress of speech development. It was the average of 11.1 month that the first comprehensible word was spo-ken; which precedes the ability to walk. The number of spoken words are gradually incre-ased and at the age of 16 months this increase will make a sudden rapidity. At 18 months most infants will have a vocabulary of 90 to 100 words and are capable of combining 2 wo-rds together. At this age also is the beginning when the infant becomes capable of learning how to sing


Copyright © 1963, 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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