The reliability of data may be determined either by correlating odd-even frequencies of speech sounds or by the method of the percent of agreement of the items. In the following both methods will be applied to a sample of the speech sounds of infants. The sample upon which the analyses are based are sixty records of infant speech sounds from a total of over a thousand records from the first to the thirtieth month of life. Two records per month were selected randomly by means of a table of random numbers. In this sample 13 vowel and 26 consonant sounds were found.
Proceedings of the Iowa Academy of Science
©1945 Iowa Academy of Science, Inc.
Irwin, Orvis C.
"Reliability of Speech Sound Data of Infants,"
Proceedings of the Iowa Academy of Science, 52(1), 253-254.
Available at: https://scholarworks.uni.edu/pias/vol52/iss1/32