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Related Experiment Videos

Phonetic variation in multisyllable babbling.

P R Mitchell1, R D Kent

  • 1Summit Center for Human Development, University of Wisconsin-Madison.

Journal of Child Language
|June 1, 1990
PubMed
Summary
This summary is machine-generated.

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Infant babbling shows phonetic variation early on, challenging theories of distinct repetitive and non-repetitive babbling stages in vocal development. This finding impacts our understanding of early speech sound acquisition.

Area of Science:

  • Developmental Psychology
  • Linguistics
  • Speech-Language Pathology

Background:

  • Major models of infant vocal development propose distinct stages of babbling.
  • These models suggest a progression from repetitive to phonetically varied multisyllable babbling.
  • This study investigates the validity of these proposed developmental stages.

Purpose of the Study:

  • To examine phonetic variation in infant multisyllable babbling.
  • To test assumptions about systematic increases in phonetic variation during babbling development.
  • To determine if distinct repetitive and non-repetitive babbling stages exist.

Main Methods:

  • Audiotaped multisyllable vocalizations from eight infants at 0.7, 0.9, and 0.11 years of age.
  • Categorized vocalizations based on phonetic variation (presence/absence) and source (place/manner change).

Related Experiment Videos

  • Analyzed the timing of phonetic variation within multisyllable utterances.

    • Main Results:

    • Phonetic variation was observed early in multisyllable babbling.
    • The presence of variation occurred at or near the onset of multisyllable production.
    • Findings did not support distinct repetitive and non-repetitive babbling stages.

    Conclusions:

    • Early phonetic variation in infant babbling challenges existing developmental models.
    • The proposed distinct stages of repetitive and non-repetitive babbling are not supported by this data.
    • Infant vocal development may involve more integrated processes than previously theorized.