Systematic Studies of Modified Vocalization: Effects of Speech Rate and Instatement Style During Metronome Stimulation Purpose: This study introduces a series of systematic investigations intended to clarify the parameters of the fluency-inducing conditions (FICs) in stuttering.Method: Participants included 11 adults, aged 20–63 years, with typical speech-production skills. A repeated measures design was used to examine the relationships between several speech production variables (vowel ... Article
Article  |   December 2010
Systematic Studies of Modified Vocalization: Effects of Speech Rate and Instatement Style During Metronome Stimulation
 
Author Affiliations & Notes
  • Jason H. Davidow
    Hofstra University, Hempstead, NY
  • Anne K. Bothe
    University of Georgia, Athens
  • Jessica D. Richardson
    University of South Carolina, Columbia
  • Richard D. Andreatta
    University of Kentucky, Lexington
  • Contact author: Jason H. Davidow, Department of Speech-Language-Hearing Sciences, Hofstra University, Hempstead, NY 11549. E-mail: jason.davidow@hofstra.edu.
  • © 2010 American Speech-Language-Hearing AssociationAmerican Speech-Language-Hearing Association
Article Information
Speech, Voice & Prosody / Speech
Article   |   December 2010
Systematic Studies of Modified Vocalization: Effects of Speech Rate and Instatement Style During Metronome Stimulation
Journal of Speech, Language, and Hearing Research, December 2010, Vol. 53, 1579-1594. doi:10.1044/1092-4388(2010/09-0173)
History: Received August 17, 2009 , Revised December 14, 2009 , Accepted April 12, 2010
 
Journal of Speech, Language, and Hearing Research, December 2010, Vol. 53, 1579-1594. doi:10.1044/1092-4388(2010/09-0173)
History: Received August 17, 2009; Revised December 14, 2009; Accepted April 12, 2010
Web of Science® Times Cited: 4

Purpose: This study introduces a series of systematic investigations intended to clarify the parameters of the fluency-inducing conditions (FICs) in stuttering.

Method: Participants included 11 adults, aged 20–63 years, with typical speech-production skills. A repeated measures design was used to examine the relationships between several speech production variables (vowel duration, voice onset time, fundamental frequency, intraoral pressure, pressure rise time, transglottal airflow, and phonated intervals) and speech rate and instatement style during metronome-entrained rhythmic speech.

Results: Measures of duration (vowel duration, voice onset time, and pressure rise time) differed across different metronome conditions. When speech rates were matched between the control condition and metronome condition, voice onset time was the only variable that changed.

Conclusion: Results confirm that speech rate and instatement style can influence speech production variables during the production of fluency-inducing conditions. Future studies of normally fluent speech and of stuttered speech must control both features and should further explore the importance of voice onset time, which may be influenced by rate during metronome stimulation in a way that the other variables are not.

Acknowledgment
This research was supported by grants awarded to the first author from the National Institutes of Health and Hofstra University.
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