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Related Experiment Video

Updated: May 18, 2026

Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
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Divided Attention Has Limited Effects on Speech Sensorimotor Control.

Jenna Krakauer1, Chris Naber2, Caroline A Niziolek1,2

  • 1Department of Communication Sciences and Disorders, University of Wisconsin-Madison.

Journal of Speech, Language, and Hearing Research : JSLHR
|October 17, 2024
PubMed
Summary

Divided attention minimally impacts speech motor control for vowel production, suggesting individual differences stem from the speech system, not cognitive factors. This finding aids in understanding speech variability and refining experimental methods.

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Area of Science:

  • Speech motor control
  • Auditory-visual speech perception
  • Human sensorimotor adaptation

Background:

  • Speakers adjust speech production to counteract auditory perturbations (compensation) and in subsequent trials (adaptation).
  • Individual variability in these responses is often attributed to auditory acuity, but attention's role is under-explored.

Purpose of the Study:

  • To investigate the impact of divided attention on sensorimotor control during speech production.
  • To determine if cognitive factors like attention influence compensation and adaptation to vowel formant perturbations.

Main Methods:

  • Healthy speakers experienced real-time auditory perturbation of vowel formants.
  • Participants completed tasks under divided attention (visual distractor) and single-task conditions.
  • Online compensation and trial-to-trial adaptation were measured.

Main Results:

  • Divided attention slightly delayed online compensation (>300 ms post-vowel onset), beyond typical vowel durations.
  • No significant effect of divided attention was observed on speech adaptation.
  • These findings indicate that sensory feedback in speech is largely automatic.

Conclusions:

  • Speech motor control for typical production is automatic and not significantly affected by divided visual attention.
  • Variability in responses to formant perturbations likely originates within the speech production system.
  • Future research should measure compensation within 300 ms to avoid attentional confounds.