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Related Experiment Videos

The McGurk effect in infants

L D Rosenblum1, M A Schmuckler, J A Johnson

  • 1Department of Psychology, University of California, Riverside 92521, USA. rosenblu@citrus.ucr.edu

Perception & Psychophysics
|April 1, 1997
PubMed
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Five-month-old infants demonstrate the McGurk effect, showing visual speech influences auditory perception similarly to adults. This indicates early development of audiovisual speech integration in prelinguistic infants.

Area of Science:

  • Developmental Psychology
  • Auditory Perception
  • Speech Processing

Background:

  • The McGurk effect demonstrates how visual speech influences auditory speech perception.
  • This phenomenon is well-documented in adults across various languages.
  • However, its presence in prelinguistic infants remained unexplored.

Purpose of the Study:

  • To investigate whether prelinguistic infants exhibit the McGurk effect.
  • To determine if infants integrate visual and auditory speech information similarly to adults.

Main Methods:

  • 5-month-old, English-exposed infants were habituated to audiovisual /va/.
  • Dishabituation stimuli included audio /ba/-visual /va/ and audio /da/-visual /va/.
  • Infant looking time was measured to assess perceptual responses.

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Main Results:

  • Infants generalized from audiovisual /va/ to audio /ba/-visual /va/.
  • Infants did not generalize to audio /da/-visual /va/.
  • These differences were not attributable to stimulus preference or auditory similarity.

Conclusions:

  • Prelinguistic infants show audiovisual speech integration consistent with the McGurk effect.
  • This suggests that the visual influence on speech perception develops early.
  • Findings indicate infants process audiovisual speech similarly to adults at 5 months of age.