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Attention influences vocal adjustments to auditory feedback, but only under low attentional load. This neurophysiological study shows that cortical processing of auditory-vocal integration is modulated by attention, impacting voice control.

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Area of Science:

  • Neuroscience
  • Speech Science
  • Cognitive Psychology

Background:

  • Auditory feedback alterations trigger rapid vocal adjustments.
  • The role of attention in these involuntary vocal responses is not well understood.

Purpose of the Study:

  • To investigate if attention modulates neurobehavioral processing of auditory-vocal integration.
  • To examine the effect of different attentional loads on vocal adjustments to pitch perturbations.

Main Methods:

  • Event-related potential (ERP) study measuring brain activity during sustained phonation with pitch-shifted auditory feedback.
  • Participants performed tasks with varying attentional demands: ignoring, low-load attending, or high-load attending to pitch perturbations.

Main Results:

  • Behavioral vocal responses to pitch perturbations were not affected by attention.
  • Event-related potential (ERP) analysis revealed enhanced P2 response to attended pitch perturbations under low attentional load.
  • Under high attentional load, P2 response did not differ from the ignored condition, suggesting attentional load limits modulation.

Conclusions:

  • Attention can modulate auditory-motor integration in voice control at the cortical level.
  • This modulation is dependent on attentional load, not a general enhancement.
  • Findings provide neurophysiological evidence for attention's role in voice production adjustments.