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Some critical developments in acquiring native language sound organization during the first year.

Peter W Jusczyk1

  • 1Department of Psychology, Johns Hopkins University, Baltimore, Maryland, USA.

The Annals of Otology, Rhinology & Laryngology. Supplement
|May 23, 2002
PubMed
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Infants learn native language sound patterns before 6 months, developing word segmentation skills by 10.5 months using stress and other cues. This knowledge aids in word recognition and learning new vocabulary.

Area of Science:

  • Developmental Psychology
  • Linguistics
  • Speech Perception

Background:

  • Infants possess innate abilities to distinguish speech sounds but must acquire native language-specific sound organization.
  • Early auditory development shows limited sensitivity to native vs. non-native language sound patterns before six months of age.

Purpose of the Study:

  • To investigate the developmental trajectory of infants' sensitivity to native language sound organization.
  • To understand the role of phonological and rhythmic cues in infant word segmentation.
  • To examine how lexical development influences word segmentation strategies.

Main Methods:

  • Longitudinal observation of infant speech sound discrimination and categorization.
  • Analysis of infant responses to native and non-native language sound patterns.

Related Experiment Videos

  • Tracking the development of word segmentation abilities using various linguistic cues.
  • Correlating lexicon growth with word segmentation proficiency.

    • Main Results:

    • Infants develop sensitivity to native language sound patterns, sequences, and rhythms after six months.
    • Word segmentation abilities emerge rapidly between 7.5 and 10.5 months.
    • Early segmentation relies on stress cues, later incorporating other boundary indicators.
    • Lexical knowledge in the second year supports segmentation and new word learning.

    Conclusions:

    • Infant word segmentation is a developing skill influenced by increasing sensitivity to native language phonology and prosody.
    • The ability to segment words from fluent speech is crucial for vocabulary acquisition.
    • Gradual refinement of segmentation strategies, from stress cues to lexical knowledge, supports language development.