The speech sounds of a group of ten feeble-minded children with an average age of three years were transcribed in the International Phonetic Alphabet at a year's interval. Comparisons were made of the two transcriptions. Further comparisons were made of the transcriptions of these feeble-minded children's records with six month old infants and with adult speech sound transcriptions.
Proceedings of the Iowa Academy of Science
©1942 Iowa Academy of Science, Inc.
Irwin, Orvis C.
"The Speech Sound Status of a Small Group of Low-Grade Feeble-Minded Children,"
Proceedings of the Iowa Academy of Science, 49(1), 449-449.
Available at: https://scholarworks.uni.edu/pias/vol49/iss1/89