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Variables affecting stutterer's initial reactions to delayed auditory feedback

B D Burke1

  • 1New South Wales College of Paramedical Studies, School of Speech Therapy, Camperdown, Australia.

Journal of Communication Disorders
|June 1, 1975
PubMed
Summary
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Delayed auditory feedback (DAF) affects young stutterers more than older ones. Specific delay ranges can reduce stuttering, but results vary, challenging current stuttering theories.

Area of Science:

  • Speech and Language Pathology
  • Auditory Neuroscience
  • Developmental Psychology

Background:

  • Delayed auditory feedback (DAF) is known to affect speech fluency.
  • Its impact on stuttering, particularly across different age groups and initial disfluency levels, requires further investigation.

Purpose of the Study:

  • To investigate the effects of varying delayed auditory feedback (DAF) durations on the disfluency of male stutterers aged 7-18 years.
  • To examine how age and initial disfluency levels interact with DAF to influence stuttering behaviors.

Main Methods:

  • Twenty male stutterers (ages 7-18) described pictures and repeated sentences under DAF conditions.
  • Auditory feedback delay was systematically varied from 0 to 300 milliseconds in 50-millisecond increments.

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Main Results:

  • A significant interaction was found between DAF duration, age, and initial disfluency, impacting disfluent word counts but not speech rate.
  • Younger stutterers (7-12 years) were more affected by DAF than older stutterers (13-18 years).
  • High disfluency stutterers showed reduced disfluency under DAF, while low disfluency stutterers showed varied responses, including increased disfluency. Delays of 50-150 ms generally improved fluency.

Conclusions:

  • DAF's effect on stuttering is complex and age-dependent, with younger individuals and those with higher initial disfluency exhibiting different responses.
  • The findings suggest that current feedback theories of stuttering may not fully explain the observed DAF effects.
  • Further research is needed to refine our understanding of auditory feedback mechanisms in stuttering.