Babbling Development of Hearing-Impaired and Normally Hearing Subjects Phonetic transcriptions of babbling samples from 11 normally hearing subjects, age 4–18 months, were compared with samples from 11 hearing-impaired subjects, age 4–28 months. Longitudinal data were available for all hearing babies and for 8 of the 11 hearing-impaired subjects. The analysis focused on two measures: (a) size of consonantal ... Research Article
Research Article  |   February 01, 1986
Babbling Development of Hearing-Impaired and Normally Hearing Subjects
 
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Article Information
Research Article   |   February 01, 1986
Babbling Development of Hearing-Impaired and Normally Hearing Subjects
Journal of Speech and Hearing Disorders, February 1986, Vol. 51, 33-41. doi:10.1044/jshd.5101.33
History: Received May 29, 1985 , Accepted November 16, 1985
 
Journal of Speech and Hearing Disorders, February 1986, Vol. 51, 33-41. doi:10.1044/jshd.5101.33
History: Received May 29, 1985; Accepted November 16, 1985

Phonetic transcriptions of babbling samples from 11 normally hearing subjects, age 4–18 months, were compared with samples from 11 hearing-impaired subjects, age 4–28 months. Longitudinal data were available for all hearing babies and for 8 of the 11 hearing-impaired subjects. The analysis focused on two measures: (a) size of consonantal repertoire over time and (b) proportional occurrence of multisyllabic consonant-vowel utterances. On average, the normally hearing subjects evidenced an increase in size of their consonantal repertoires with age; in contrast, the hearing-impaired subjects in the same age range had smaller repertoires that decreased over time. Comparison of multisyllabic utterances revealed a general tendency for the hearing-impaired subjects to produce fewer multisyllabic utterances containing true consonants and for some of the hearing-impaired children to produce a high proportion of vocalizations with glides or glottal stops. These findings suggest both qualitative and quantitative differences in the babbling of the two groups.

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