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Perceptual learning in speech: stability over time.

Frank Eisner1, James M McQueen

  • 1Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands. f.eisner@ucl.ac.uk

The Journal of the Acoustical Society of America
|April 29, 2006
PubMed
Summary
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Listener speech perception quickly adapts to individual talkers. These adaptations remain robust over 12 hours, even with exposure to new talkers or during sleep.

Area of Science:

  • Auditory perception
  • Speech processing
  • Phonetics

Background:

  • Speech perception is adaptable, adjusting to unique talker articulations.
  • Listener adjustments to speech sounds are rapid.
  • The long-term stability and generalizability of these perceptual adaptations are not fully understood.

Purpose of the Study:

  • To investigate the long-term stability of perceptual adjustments to speech sounds.
  • To determine if exposure to other talkers affects learned speech adaptations.
  • To examine the role of sleep in consolidating speech learning.

Main Methods:

  • Listeners were exposed to speech containing an ambiguous sound.
  • Perceptual adjustments were measured immediately after learning and after a 12-hour interval.

Related Experiment Videos

  • Intervention groups experienced different conditions during the 12-hour interval: sleep, wakefulness with novel talkers, or wakefulness with the same talker.

    • Main Results:

    • Perceptual adjustments remained equally robust after 12 hours as they were immediately after learning.
    • These adaptations were maintained even when listeners were exposed to speech from different talkers during the interval.
    • Consolidation during sleep did not enhance the stability of the learned perceptual adjustments compared to wakeful periods.

    Conclusions:

    • Speech perceptual adaptations are remarkably stable over time.
    • Learned adaptations generalize across different talkers.
    • Sleep does not appear to be necessary for consolidating these specific types of speech perceptual learning.