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Related Experiment Videos

Concurrent cognitive processing and letter sequence transcription deficits in stutterers.

W G Webster1

  • 1Department of Psychology, Carleton University, Ottawa, Ontario, Canada.

Canadian Journal of Psychology
|March 1, 1990
PubMed
Summary

People who stutter show deficits in transcribing letter sequences, even when not multitasking. This difficulty appears related to organizing new response transitions, not general motor speed.

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Area of Science:

  • Speech and Language Pathology
  • Cognitive Psychology
  • Neuroscience

Background:

  • Previous studies show stuttering affects rapid letter sequence transcription.
  • The deficit was previously thought to be linked to concurrent monitoring and responding tasks.

Purpose of the Study:

  • To investigate if the transcription deficit in stutterers extends to non-concurrent tasks.
  • To determine if stutterers have difficulty parsing stimulus information internally.
  • To examine the generalizability of the deficit to women and internally generated sequences.

Main Methods:

  • Two experiments were conducted involving transcription of rapidly presented and successively presented letter sequences.
  • Participants included men and women who stutter and non-stuttering controls.

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  • Additional tasks included transcribing internally generated sequences and repetitive sequences.

    • Main Results:

    • Stutterers exhibited transcription deficits in both concurrent and successive tasks.
    • Performance did not improve with pauses or experience with pre-parsed sequences.
    • Stutterers were slower in writing internally generated sequences but not repetitive ones.

    Conclusions:

    • The letter sequence transcription deficit in stutterers is not limited to concurrent tasks.
    • The deficit is not due to internal stimulus parsing difficulties.
    • Stutterers may struggle with organizing and executing tasks involving new multiple response transitions.