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Linguistic initiation signals increase auditory feedback error correction.

Agnès Alsius1, Takashi Mitsuya2, Nida Latif1

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|September 3, 2017
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Summary
This summary is machine-generated.

Speakers adjust vocal error correction based on prompt type. Linguistic prompts, unlike non-linguistic ones, increase speech motor control adjustments to auditory perturbations, revealing context-dependent mechanisms in vocal production.

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Area of Science:

  • Speech production
  • Auditory feedback
  • Motor control

Background:

  • Speech production involves flexible adaptation to context.
  • The influence of speech initiation methods on automatic vocal motor control is not fully understood.
  • Previous research highlights the role of speech tasks in motor behavior.

Purpose of the Study:

  • To investigate if the initiation of a speaking action modifies low-level, automatic vocal motor control.
  • To determine the effect of linguistic versus non-linguistic go signals on speech motor adaptation.
  • To explore how auditory feedback perturbations are corrected based on prompt type.

Main Methods:

  • Participants produced the word "head" upon receiving auditory or visual prompts.
  • Real-time auditory feedback was manipulated by altering the first formants of the vowel /ε/.
  • A custom signal processing system was used for feedback alteration.

Main Results:

  • Linguistic prompts led to greater corrective behaviors in response to acoustic perturbations compared to non-linguistic prompts.
  • The accepted variance for the intended speech sound decreased when linguistic templates were provided.
  • Automatic vocal error correction is influenced by context-dependent mechanisms.

Conclusions:

  • The nature of the go signal (linguistic vs. non-linguistic) impacts vocal motor control.
  • Providing external linguistic templates tightens the control over speech sound production.
  • Vocal error correction mechanisms are flexible and context-dependent.