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Organization of babbling: a case study

B L Davis1, P F MacNeilage

  • 1Department of Speech Communication, University of Texas at Austin 78712, USA.

Language and Speech
|October 1, 1994
PubMed
Summary
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Babbling speech in infants involves a basic mouth opening-closing pattern. This mandibular oscillation, along with tongue movements, shapes early speech sounds and variations.

Area of Science:

  • Linguistics
  • Developmental Psychology
  • Speech Science

Background:

  • Speech is a complex behavior, yet its earliest stages, like babbling, remain under-investigated.
  • No systematic studies have explored the organizational principles of speech output during infancy.

Observation:

  • Analyzed 423 babbled utterances (1145 syllables) from a single subject aged 7-12 months.
  • Focused on the structural organization of speech during the babbling phase.

Findings:

  • Babbling primarily follows a mouth opening-closing alternation, forming vowel-consonant structures.
  • Mandibular oscillation provides a framework for babbling, influencing vowel height, consonant closure, and stress.
  • Tongue fronting movements contribute to variations in speech sounds, affecting multiple phonemes.

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Implications:

  • Suggests a biomechanical basis for early speech sound production.
  • Provides insights into the foundational motor control mechanisms underlying language acquisition.
  • Highlights the role of articulatory dynamics in shaping infant vocalizations.