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Infants' sensitivity to allophonic cues for word segmentation.

P W Jusczyk1, E A Hohne, A Bauman

  • 1Department of Psychology, Johns Hopkins University, Baltimore, MD 21218, USA. jusczyk@jhu.edu

Perception & Psychophysics
|December 22, 1999
PubMed
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Nine-month-old infants struggle with allophonic cues for word segmentation. However, by 10.5 months, infants can use these subtle phonetic cues to identify words in fluent speech.

Area of Science:

  • Developmental Psychology
  • Linguistics
  • Cognitive Science

Background:

  • Infants learn language through complex auditory processing.
  • Word segmentation is a crucial early linguistic skill.
  • The role of phonetic cues in infant word segmentation is not fully understood.

Purpose of the Study:

  • To investigate if English-learning infants can use allophonic cues to segment words.
  • To determine the developmental trajectory of using allophonic cues for word segmentation.
  • To examine the interplay between allophonic and distributional cues in word segmentation.

Main Methods:

  • Four experiments involving infant familiarization and testing in fluent speech passages.
  • Familiarization with two-syllable word pairs (e.g., nitrates/night rates).

Related Experiment Videos

  • Testing infants' ability to detect familiarized words amidst acoustically similar foils.

    • Main Results:

    • Nine-month-olds did not effectively use allophonic cues alone for segmentation.
    • Distributional cues aided 9-month-olds in segmenting familiarized words.
    • Ten-and-a-half-month-olds successfully segmented words using only allophonic cues.

    Conclusions:

    • Allophonic cue use for word segmentation emerges later in infancy.
    • Distributional information supports early word segmentation development.
    • Findings illuminate the developmental progression of auditory word segmentation skills.