Phonological process decline from 2 1/2 to 8 years.
The phonological development of 145 children between the ages of 2 1/2 and 8 years was examined. Speech was assessed annually using a standardized articulation test and analyzed for the occurrence of both common and uncommon phonological processes. A marked decline in process usage was observed between the ages of 2 1/2 and 4 years and infrequent process usage was observed after the age of 4. Uncommon processes were used infrequently, even at 2 1/2 years. No sex differences were found. Race differences were found with respect to isolated processes.
Roberts
J E
JE
Frank Porter Graham Child Development Center, University of North Carolina, Chapel Hill.
Burchinal
M
M
Footo
M M
MM
D001184:Articulation Disorders / Q000175:diagnosis; D002648:Child; D002656:Child Day Care Centers; D002675:Child, Preschool; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007804:Language Development; D007805:Language Development Disorders / Q000175:diagnosis; D008137:Longitudinal Studies; D008297:Male; D010700:Phonetics; D011446:Prospective Studies; D013062:Speech Articulation Tests