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Precise feedback control underlies sensorimotor learning in speech.

Chris Vaughn1, Sazzad M Nasir2

  • 1Georgia State University, Atlanta, Georgia; and.

Journal of Neurophysiology
|November 28, 2014
PubMed
Summary
This summary is machine-generated.

Speech learning varies greatly. Precise auditory feedback error detection is key for correcting speech, guiding motor learning and achieving vocal goals like vowel sounds.

Keywords:
feedback controlformant trajectorylearning variabilityspeech motor learning

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Area of Science:

  • Speech motor control
  • Auditory feedback processing
  • Language acquisition

Background:

  • Speech learning is complex and individual.
  • Auditory feedback plays a crucial role in speech production and learning.
  • Understanding the mechanisms of speech motor learning is vital for addressing speech disorders.

Purpose of the Study:

  • To investigate the role of auditory feedback error sensing in speech motor learning.
  • To quantify the contribution of feedback to learning in a speech task.
  • To explore the relationship between formant trajectories and speech learning.

Main Methods:

  • A speech motor learning paradigm using altered auditory feedback.
  • Subjects repeated a target word with real-time auditory feedback manipulation.
  • Analysis of formant trajectories and calculation of one-lag covariance between feedback and utterance.

Main Results:

  • Individuals exhibited variable learning rates, with some failing to learn.
  • One-lag covariance between formant trajectories of feedback and subsequent utterances predicted learning.
  • Formant trajectories provide rich information for evaluating speech motor learning.

Conclusions:

  • Sensing auditory feedback errors is a significant factor in speech learnability.
  • Formant trajectory analysis offers a novel and effective method for assessing speech motor learning.
  • This research highlights the importance of auditory feedback in achieving speech goals, particularly for vowel sounds.