Systematic studies of modified vocalization: Effects of speech rate and instatement style during metronome stimulation

Jason H. Davidow, Anne K. Bothe, Jessica D. Richardson, Richard D. Andreatta

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


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 speechmust 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.

Original languageEnglish
Pages (from-to)1579-1594
Number of pages16
JournalJournal of Speech, Language, and Hearing Research
Issue number6
StatePublished - Dec 1 2010


  • Fluency-inducing conditions
  • Rhythmic speech
  • Stuttering
  • Vocalization

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing


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