Maximum Phoneme Duration of /s/ and /z/ by Children with Vocal Nodules The maximum phoneme duration (MPD) of /s/ and /z/ task was measured for eight male and eight female prepubertal children with medically diagnosed vocal nodules. The sustained durations for each sound were tallied for both groups of subjects and submitted to appropriate t tests. Mean s/z ratios were compiled also. ... Research Article
Research Article  |   July 01, 1982
Maximum Phoneme Duration of /s/ and /z/ by Children with Vocal Nodules
 
Author Notes
  • Michael P. Rastatter, Ph.D., is an Assistant Professor of Speech and Melvin Hyman, Ph.D., is a Professor and Chair of the Programs in Communication Disorders, School of Speech Communication, Bowling Green State University, Bowling Green, OH 43403. Requests for reprints may be sent there.
    Michael P. Rastatter, Ph.D., is an Assistant Professor of Speech and Melvin Hyman, Ph.D., is a Professor and Chair of the Programs in Communication Disorders, School of Speech Communication, Bowling Green State University, Bowling Green, OH 43403. Requests for reprints may be sent there.×
Article Information
Research Articles
Research Article   |   July 01, 1982
Maximum Phoneme Duration of /s/ and /z/ by Children with Vocal Nodules
Language, Speech, and Hearing Services in Schools, July 1982, Vol. 13, 197-199. doi:10.1044/0161-1461.1303.197
History: Received April 24, 1980 , Accepted March 2, 1981
 
Language, Speech, and Hearing Services in Schools, July 1982, Vol. 13, 197-199. doi:10.1044/0161-1461.1303.197
History: Received April 24, 1980; Accepted March 2, 1981

The maximum phoneme duration (MPD) of /s/ and /z/ task was measured for eight male and eight female prepubertal children with medically diagnosed vocal nodules. The sustained durations for each sound were tallied for both groups of subjects and submitted to appropriate t tests. Mean s/z ratios were compiled also. Results showed that all our subjects' MPD values for both the /s/ and /z/ were shorter than those posited by Tait, Michel, and Carpenter (1980) for their normal subjects. In all cases, the /z/ was sustained longer than the /s/, evidencing a mean MPD ratio of .90. Inspection of the variance in the data showed that all subjects were able to produce the /s/ with greater consistency. Such results indicate the presence of vocal nodules does not affect the MPD s/z ratio, where as the durations of /s/ and /z/ and the variance observed across multiple productions of /z/ are affected and should be considered as diagnostically significant.

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