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

dc.contributor.authorForrest, Karenen
dc.contributor.authorWeismer, Garyen
dc.contributor.authorHodge, Meganen
dc.contributor.authorElbert, Maryen
dc.contributor.authorDinnsen, Daniel A.en
dc.description.abstractThe 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.en
dc.description.sponsorshipNational Institutes of Health DC00433, RR7031K, DC00076, DC001694 (PI: Gierut)en
dc.description.versionThis is an Accepted Manuscript of an article published by Taylor & Francis in Clinical Linguistics & Phonetics on January 1990, available online:
dc.identifier.citationForrest, 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.en
dc.publisherTaylor & Francis Health Sciencesen
dc.rights© 1990 Taylor & Francis Ltd.en
dc.subjectchild phonologyen
dc.subjectclinical phonologyen
dc.subjectphonological disorders in childrenen
dc.subjectphonological treatmenten
dc.subjectLearnability Projecten
dc.subjectlanguage acquisitionen
dc.titleStatistical analysis of word-initial /k/ and /t/ produced by normal and phonologically disordered childrenen


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