Statistical analysis of word-initial /k/ and /t/ produced by normal and phonologically disordered children

Loading...
Thumbnail Image
If you need an accessible version of this item, please email your request to iusw@iu.edu so that they may create one and provide it to you.
Date
1990
Journal Title
Journal ISSN
Volume Title
Publisher
Taylor & Francis Health Sciences
Abstract
The acoustic characteristics of voiceless velar and alveolar stop consonants were investigated for normally articulating and phonologically disordered children using spectral moments. All the disordered children were perceived to produce It/ for /k/, with /k/ being absent from their phonetic inventories. Approximately 82% of the normally articulating children's consonants were classified correctly by discriminant function analysis, on the basis of the mean (first moment), skewness (third moment) and kurtosis (fourth moment) derived from the first 40 ms of the VOT interval. When the discriminant function developed for the normally articulating children was applied to the speech of the phonologically disordered group of children, no distinction was made between the velar and alveolar stops. Application of the model to the speech of individual children in the disordered group revealed that one child produced distinct markings to the velar-alveolar contrast. Variability measures of target /t/ and /k/ utterances indicated greater variability in this disordered child's productions compared with the normally articulating children. Phonological analysis of this child's speech after treatment, in which the velar-alveolar contrast was not treated, revealed target appropriate productions of both It/ and /k/. By contrast, the other three phonologically disordered children, for whom no acoustic distinction was found between target It/ and target /k/, did not evidence any knowledge of the contrast after treatment with other target phonemes.
Description
Keywords
phonology, child phonology, clinical phonology, phonological disorders in children, phonological treatment, Learnability Project, language acquisition
Citation
Forrest, K., Weismer, G., Hodge, M., Dinnsen, D. A. & Elbert, M. (1990). Statistical analysis of word-initial /k/ and /t/ produced by normal and phonologically disordered children. Clinical Linguistics & Phonetics, 4(4), 327-340.
DOI
Link(s) to data and video for this item
Relation
Rights
© 1990 Taylor & Francis Ltd.
Type
Article
Collections