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Related Experiment Videos

Relationship between rhythmic behavior and canonical babbling in infant vocal development

K Ejiri1

  • 1Department of Psychology, Ochanomizu University, Tokyo, Japan. ejiri@cc.ocha.ac.jp

Phonetica
|February 6, 1999
PubMed
Summary

Infants

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Area of Science:

  • Developmental psychology
  • Speech and language development
  • Auditory neuroscience

Background:

  • Canonical babbling (CB) is a crucial stage in infant vocal development.
  • Previous studies suggest a link between CB onset and peak rhythmic activity periods.

Purpose of the Study:

  • To investigate the relationship between rhythmic motor activities and the onset of canonical babbling in infants.
  • To determine if auditory feedback influences motor control during this developmental phase.

Main Methods:

  • Longitudinal observation of 28 Japanese infants aged 5-9 months.
  • Experimental sessions involving audible and inaudible rattles to assess motor responses.
  • Observational sessions of spontaneous rhythmic activities under natural conditions.

Main Results:

  • Rhythmic activities peaked around the onset of canonical babbling.
  • Infants initially shook rattles regardless of sound.
  • Subsequently, infants preferentially shook audible rattles, indicating auditory feedback influence.

Conclusions:

  • Infant rhythmic motor control develops in conjunction with auditory feedback.
  • This auditory-motor integration is critical for the emergence of canonical babbling and spoken language acquisition.

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