The Effect of Manipulating Phonation Duration on Stuttering Two single-subject experiments with two adult stutterers were conducted to assess the effect of changing the frequencv of phonation intervals that were shorter or greater than prescribed durations during spontaneous speech. Both subjects modified the frequency of prescribed phonation intervals and showed changes in the frequency of these intervals that ... Research Article
Research Article  |   December 01, 1983
The Effect of Manipulating Phonation Duration on Stuttering
 
Author Affiliations & Notes
  • Roger J. Ingham
    Cumberland College of Health Sciences, Sydney, Australia
  • Jack Montgomery
    Cumberland College of Health Sciences, Sydney, Australia
  • Louise Ulliana
    Cumberland College of Health Sciences, Sydney, Australia
Article Information
Research Articles
Research Article   |   December 01, 1983
The Effect of Manipulating Phonation Duration on Stuttering
Journal of Speech, Language, and Hearing Research, December 1983, Vol. 26, 579-587. doi:10.1044/jshr.2604.579
History: Received March 12, 1982 , Accepted April 12, 1983
 
Journal of Speech, Language, and Hearing Research, December 1983, Vol. 26, 579-587. doi:10.1044/jshr.2604.579
History: Received March 12, 1982; Accepted April 12, 1983

Two single-subject experiments with two adult stutterers were conducted to assess the effect of changing the frequencv of phonation intervals that were shorter or greater than prescribed durations during spontaneous speech. Both subjects modified the frequency of prescribed phonation intervals and showed changes in the frequency of these intervals that were positively related to decreases and increases in stuttering frequency. A perceptual analysis of the subjects' speech quality during phonation control conditions showed that when stuttering frequency was reduced, listeners could detect changes in the speech quality, of both subjects; however, only one subject's speech during these conditions was described as nonnormal sounding. The therapeutic and theoretical implications of these findings are discussed.

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