Phonetic Inventories, 15–24 Months A Longitudinal Study Research Article
Research Article  |   December 01, 1985
Phonetic Inventories, 15–24 Months
 
Author Affiliations & Notes
  • Carol Stoel-Gammon
    University of Washington, Seattle
Article Information
Research Articles
Research Article   |   December 01, 1985
Phonetic Inventories, 15–24 Months
Journal of Speech, Language, and Hearing Research, December 1985, Vol. 28, 505-512. doi:10.1044/jshr.2804.505
History: Received November 20, 1984 , Accepted May 23, 1985
 
Journal of Speech, Language, and Hearing Research, December 1985, Vol. 28, 505-512. doi:10.1044/jshr.2804.505
History: Received November 20, 1984; Accepted May 23, 1985

Longitudinal samples of meaningful speech of 34 normally developing children were analyzed to determine the range and types of consonantal phones produced at 15, 18, 21, and 24 months. Separate inventories for word-initial and word-final consonants were constructed for each child at each age level. Group analyses showed that early inventories in initial position were composed primarily of voiced anterior stops, nasals, and glides; by 24 months, voiceless stops, velars, and a few fricatives were also included. In final position, inventories consisted primarily of voiceless stops and alveolar consonants. There was a strong tendency for the voiced stops to appear first in initial position and for [t] and [r] to appear first in word-final. Individual analyses of place and manner of articulation revealed highly similar patterns across subjects. The findings are related to other longitudinal research in early phonological development and to studies of babbling of younger subjects and correct productions of older subjects.

Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access