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A critical evaluation of visually moderated phonetic context effects.

Lori L Holt1, Joseph D W Stephens, Andrew J Lotto

  • 1Department of Psychology, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA. lholt@andrew.cmu.edu

Perception & Psychophysics
|January 7, 2006
PubMed
Summary

This study investigated the visually moderated phonetic context effect. Findings suggest the original effect resulted from audiovisual interaction with concurrent stimuli, not preceding visual information influencing speech sound perception.

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Area of Science:

  • Psychology
  • Speech Perception
  • Audiovisual Integration

Background:

  • A prior study reported a visually moderated phonetic context effect.
  • This effect suggested visual information influences subsequent speech sound perception.

Purpose of the Study:

  • To explore and clarify the visually moderated phonetic context effect.
  • To determine if the effect is due to preceding visual information or concurrent audiovisual interaction.

Main Methods:

  • Replication attempts using novel and original stimulus materials.
  • Experiments designed to isolate the influence of concurrent visual information.

Main Results:

  • Experiment 1 failed to replicate the effect with new materials.

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  • Experiment 2 replicated the effect using original materials.
  • Experiments 3 and 4 indicated concurrent visual information explains the original findings.
  • Conclusions:

    • The visually moderated phonetic context effect appears to be an audiovisual interaction.
    • The effect is likely due to concurrent stimuli, not preceding visual information impacting later speech perception.