ERIC Number: ED047929
Record Type: RIE
Publication Date: 1970-Aug
Reference Count: 0
The American Child's Acquisition of Differential Vowel Duration. Part 2 of Two Parts.
Naeser, Margaret A.
The development of differential vowel duration was observed in six children who were tape recorded at 1-month intervals from 26 to 36 months of age and in three children from 21 to 24 months of age. By differential vowel duration is meant the relatively different durations of vowels according to whether the following consonant is voiced or voiceless, stop or fricative. The children's task was to produce a series of consonant-vowel-consonant English words using each of the vowels /I i u/ before one voiceless and one voiced fricative. Four stimulus conditions were used: a visual stimulus using familiar storybook pictures and three sets of tape-recorded stimuli with the vowel /i/. One set had normal differential vowel duration, another had abnormal equal vowel duration, and the third had four occurrences of each word with graded vowel durations. Results showed that acquisition of differential vowel duration preceded control of the voicing feature which conditions it in adult English. Correct intrinsic vowel duration was produced in all responses. This document, Part 2, includes the report of the fourth stimulus condition, conclusions, appendixes, and a bibliography. Part 1 of this study can be found in document RE 003 491. (Author/DH)
Publication Type: N/A
Education Level: N/A
Sponsor: Office of Education (DHEW), Washington, DC. Bureau of Research.
Authoring Institution: Wisconsin Univ., Madison. Research and Development Center for Cognitive Learning.