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Compensation for visually specified coarticulation in liquid-stop contexts.

Navin Viswanathan1,2, Joseph D W Stephens3

  • 1Department of Speech-Language-Hearing, University of Kansas, Lawrence, KS, USA. navin@ku.edu.

Attention, Perception & Psychophysics
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Summary
This summary is machine-generated.

Speech perception research shows visual coarticulation can influence perception, especially when auditory cues are absent. However, visual effects are weaker than auditory ones when auditory information is ambiguous.

Keywords:
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Area of Science:

  • Psychology
  • Linguistics
  • Auditory Perception

Background:

  • The role of visual coarticulatory information in speech perception is debated, with conflicting findings across studies.
  • Previous research has yielded inconsistent results regarding the detection of visual influences on speech perception.

Purpose of the Study:

  • To investigate visual coarticulatory effects in a liquid-stop context, specifically when acoustic information is absent.
  • To reconcile contradictory findings in existing literature on visual coarticulation in speech perception.

Main Methods:

  • Utilized modified stimuli from Fowler et al. (2000) to examine visual compensation without ambiguous acoustic cues.
  • Employed a silent visual precursor to present coarticulatory information.
  • Compared effects with and without an ambiguous auditory precursor.

Main Results:

  • Visual coarticulatory information presented silently induced changes in target categorization, suggesting visual compensation.
  • No significant visual compensation effect was detected when visual information accompanied an ambiguous auditory precursor.
  • Visual compensation effects appear weaker and less robust than auditory compensation.

Conclusions:

  • Visually presented coarticulatory information can influence speech perception, particularly in the absence of auditory cues.
  • Auditory information may dominate or interfere with visual compensation when both are present and ambiguous.
  • Findings contribute to understanding the interplay between visual and auditory information in speech perception.