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Speech Timing Deficit of Stuttering: Evidence from Contingent Negative Variations.

Ning Ning1, Danling Peng2, Xiangping Liu3

  • 1School of Education, Soochow University, Suzhou, Jiang Su, China.

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|January 10, 2017
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Summary
This summary is machine-generated.

Adults who stutter (AWS) show differences in speech preparation, including working memory deficits and difficulties inhibiting speech responses. Motor preparation appears faster in AWS, but the cause of these effects remains unclear.

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Area of Science:

  • Neuroscience
  • Speech-Language Pathology

Background:

  • Stuttering (AWS) affects speech production.
  • Understanding the neural underpinnings of speech preparation in AWS is crucial.

Purpose of the Study:

  • Investigate speech preparation processes in adults who stutter (AWS).
  • Compare event-related potentials (ERPs) between AWS and adults with fluent speech (AFS).

Main Methods:

  • Recorded ERPs in a foreperiod paradigm with Go/NoGo speech tasks.
  • Utilized warning signals (S1) and imperative stimuli (S2) to elicit responses.
  • Analyzed specific ERP components like S1-P3 and S2-P3.

Main Results:

  • AWS exhibited smaller S1-P3 amplitudes, suggesting working memory deficits in phonological programming.
  • AWS showed an earlier shift in contingent negative variation, indicating promoted motor preparation.
  • AWS displayed a reduced NoGo effect in S2-P3, pointing to difficulties in inhibiting planned speech responses.

Conclusions:

  • AWS demonstrate distinct speech preparation and response inhibition patterns compared to AFS.
  • Findings suggest potential deficits in working memory and response inhibition, alongside faster motor preparation in AWS.
  • Further research is needed to determine if these observed effects are causes or consequences of stuttering.