Dataset Information

Phonetic complexity of words immediately following utterance-initial productions in children who stutter.

ABSTRACT: The purpose of the present study was to analyze phonetic complexity in the speech of children who stutter in a manner distinct from previous research with specific emphasis on three methodological considerations: (1) analysis of the word immediately following the initial word in the utterance; (2) accounting for other additional linguistic and lexical factors; and (3) discrimination of disfluency types produced.Parent-child conversations were transcribed for 14 children who stutter (mean age=3 years, 7 months; SD=11.20 months) and coded for phonetic complexity using the Word Complexity Measure (WCM). Phonetic complexity of words immediately following the initial fluent or stuttered words of an utterance were included within binomial regression analyses, along with additional linguistic and lexical factors.Analyses indicate that the phonetic complexity of the second word of an utterance was not a significant contributor to the likelihood of whole- or part-word repetitions on the preceding initial word of the utterance.Findings support previous data that suggest the phonetic complexity of speech, at least as measured by the WCM, does not distinctly influence stuttered speech in preschool-age children.

SUBMITTER: Coalson GA

PROVIDER: S-EPMC4762712 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature

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Phonetic complexity of words immediately following utterance-initial productions in children who stutter.

Coalson Geoffrey A GA Byrd Courtney T CT

Journal of fluency disorders 20151102

<h4>Purpose</h4>The purpose of the present study was to analyze phonetic complexity in the speech of children who stutter in a manner distinct from previous research with specific emphasis on three methodological considerations: (1) analysis of the word immediately following the initial word in the utterance; (2) accounting for other additional linguistic and lexical factors; and (3) discrimination of disfluency types produced.<h4>Methods</h4>Parent-child conversations were transcribed for 14 ch ...[more]

PMID: 26586416

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Project description:This is the first study to examine the effect of phonetic contexts on children's lexical tone production. Mandarin tones in disyllabic words produced by forty-four 2- to 6-year-old children and twelve mothers were low-pass filtered to eliminate lexical information. Native Mandarin-speaking adults categorized the tones based on the pitch information in the filtered stimuli. All mothers' tones were categorized with ceiling accuracy. Counter to the findings in most previous studies on children's tone acquisition and the prevailing assumption in models of speech development that children acquire suprasegmental features much earlier than segmental features, this study found that children as old as six years of age have not mastered the production of Mandarin tones. Children's tones were judged with significantly lower accuracy than mothers' productions. Tone accuracy improved, while cross subject variability in tone accuracy decreased, with age. Children's tone accuracy was affected by the articulatory complexity of phonetic contexts. Children made more errors in tone combinations with more complex fundamental frequency (F0) contours than tone sequences with simpler F0 changes. When producing disyllabic tone sequences with complex F0 contours, children tended to shift the F0 contour of the first tone to reduce the F0 change, resulting in more tone errors in the first syllable than in the second syllable and showing substantially more anticipatory coarticulation than adults. The results provide further evidence that acquisition of lexical tones is a protracted process in children. Tones produced accurately by children in one phonetic context may not be produced correctly in another phonetic context. Children demonstrate more anticipatory coarticulation in their disyllabic productions than adults, which may be attributed to children's immature speech motor control in tone production, and is presumably a by-product of their inability to accomplish complex F0 changes within the syllable time-frame.

Dataset Information

Phonetic complexity of words immediately following utterance-initial productions in children who stutter.

Publications

Phonetic complexity of words immediately following utterance-initial productions in children who stutter.

Similar Datasets

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