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Adaptation is automatic

A G Samuel1, D Kat

  • 1Department of Psychology, State University of New York, Stony Brook 11794-2500, USA. arty@jetsam.psy.sunysb.edu

Perception & Psychophysics
|May 26, 1998
PubMed
Summary
This summary is machine-generated.

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Speech adaptation occurs automatically, even when attention is diverted by demanding tasks like arithmetic or rhyming. This suggests preattentive processing of speech sounds, challenging existing models of auditory perception.

Area of Science:

  • Cognitive Psychology
  • Auditory Neuroscience
  • Speech Perception

Background:

  • Selective adaptation is a phenomenon where exposure to a stimulus alters the perception of subsequent stimuli.
  • The role of attention in speech adaptation remains debated, with some models suggesting it requires attentional resources.

Purpose of the Study:

  • To investigate whether selective adaptation for speech is an automatic process or requires attentional resources.
  • To determine the level at which speech adaptation occurs in the auditory processing pathway.

Main Methods:

  • Two experiments employed distractor tasks (arithmetic, rhyming judgments) during auditory adaptation to speech sounds.
  • A control condition without distractor tasks was used for comparison.
  • Listeners identified speech sounds from a /ba/-/wa/ test series after adaptation to a /wa/ sound.

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Main Results:

  • Speech adaptation effects were equally pronounced in conditions with and without distractor tasks.
  • Distractor tasks, known to impose attentional costs on phonetic processing, did not diminish the adaptation effect.
  • The results indicate that speech adaptation is not dependent on attentional resources.

Conclusions:

  • Selective adaptation for speech operates automatically at an early, preattentive level of processing.
  • These findings have significant implications for current models of speech perception, suggesting a more robust and less attention-dependent mechanism.
  • The automatic nature of speech adaptation highlights the efficiency of early auditory processing systems.