The speech sounds of twenty-nine infants from the sixteenth to the eighteenth months were transcribed in the International Phonetic Alphabet. Comparisons were made of vowel and of consonant frequencies as between each of the three months. Further comparisons were made with other age groups in order to show the developmental status of the use of speech elements of the age group.
Proceedings of the Iowa Academy of Science
©1942 Iowa Academy of Science, Inc.
Anderson, Frances J.
"Speech Sound Status of Infants during the Sixteenth, Seventeenth and Eighteenth Months,"
Proceedings of the Iowa Academy of Science, 49(1), 447-451.
Available at: https://scholarworks.uni.edu/pias/vol49/iss1/85