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Jessica L Gaines1, Corby L Dale2, John F Houde3

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Speech fundamental frequency (f0) control shows an attenuation effect, similar to motor learning. Re-learning responses to pitch errors diminishes with repeated exposure within a single session.

Keywords:
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Area of Science:

  • Speech motor control
  • Auditory feedback processing
  • Implicit learning

Background:

  • Sensorimotor adaptation involves adjusting behavior to counteract sensory errors.
  • Previous studies explored unlearning and relearning in arm reaching tasks.
  • Relearning speech pitch (f0) within a single session remains understudied.

Purpose of the Study:

  • Investigate relearning mechanisms in speech f0 control.
  • Examine adaptation to altered auditory feedback in speech.
  • Determine if f0 control exhibits implicit learning characteristics.

Main Methods:

  • Participants performed a single-word speech task with alternating blocks of normal and pitch-shifted auditory feedback.
  • Three blocks of f0-shifted and unshifted feedback were presented.
  • Adaptation magnitude to pitch errors was measured.

Main Results:

  • Adaptation magnitude decreased across successive blocks of pitch-shifted feedback.
  • A significant attenuation effect was observed, with reduced adaptation in later blocks.
  • This pattern mirrors findings in implicit motor learning of arm movements.

Conclusions:

  • Speech f0 control demonstrates characteristics of implicit learning.
  • The findings suggest that relearning pitch control is subject to attenuation.
  • This research integrates speech f0 control within the broader framework of sensorimotor control.