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Early phonetic and lexical development: a productivity approach.
1Department of Educational Psychology, Rutgers University, New Brunswick, NJ 08901, USA. mccune@rci.rutgers.edu
Summary
Consistent consonant production in babbling predicts early word use. Children producing specific sounds consistently before 16 months were more likely to use words, demonstrating a link between phonetic skill and vocabulary development.
Area of Science:
- Child language acquisition
- Developmental linguistics
- Speech production
Background:
- Phonetic data is often overlooked in single-word lexicon development studies.
- Existing literature highlights the link between babbling phonetics and early speech.
- Production skill is crucial for establishing a lexicon.
Purpose of the Study:
- To investigate the relationship between phonetic skill and lexical production in infants.
- To use longitudinal productivity criteria to assess children's phonetic development.
- To demonstrate phonetic/lexical relationships during the language transition.
Main Methods:
- Longitudinal study of 20 children from 9 to 16 months.
- Analysis of vocal pattern consistency and lexical production.
- Identification of specific consonant production and referential use.
Main Results:
- Consistent production of specific consonants predicted referential lexical use at 16 months.
- The transition to word use correlated with a sharp increase in word diversity.
- Early referential speakers showed prior consistency in producing [p/b] sounds, which also dominated their early words.
- Use of at least two supraglottal consonants characterized referential speakers.
Conclusions:
- Phonetic consistency in babbling is a significant predictor of early vocabulary acquisition.
- Individual phonetic repertoires shape early word production.
- Findings support the link between phonetic development, representational ability, and pragmatic skills in language emergence.