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Related Experiment Videos

Analysis of stop consonant production errors in developmentally dysphasic children.

R E Stark, P Tallal

    The Journal of the Acoustical Society of America
    |December 1, 1979
    PubMed
    Summary

    Dysphasic children struggle with producing stop consonants, particularly those with auditory perception difficulties. Their speech errors involve voicing and place of articulation, linked to timing control issues.

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    Area of Science:

    • Linguistics
    • Speech-Language Pathology
    • Developmental Psychology

    Background:

    • Dysphasia, a language disorder, can affect speech production.
    • Children with dysphasia often exhibit difficulties in phonological processing and articulation.

    Purpose of the Study:

    • To compare the speech production skills of children with dysphasia and typically developing children.
    • To investigate the specific difficulties in producing stop consonants in dysphasic children.
    • To explore the relationship between auditory perception and speech production deficits.

    Main Methods:

    • Comparative analysis of speech production in 12 dysphasic and 12 normal children.
    • Phonetic analysis of consonant production errors.
    • Acoustic analysis of voice onset time and vowel duration.

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    Main Results:

    • Dysphasic children showed significantly more difficulty producing stop consonants than normal children.
    • Impaired perception of initial stop consonants correlated with greater production difficulties.
    • Errors primarily involved voicing and place of articulation, not omission or substitution.
    • Acoustic analyses linked voicing errors to imprecise timing control (voice onset time, vowel duration).

    Conclusions:

    • Dysphasic children's speech production deficits, particularly with stop consonants, are linked to timing control issues.
    • These timing deficits may relate to underlying auditory temporal processing difficulties.
    • Findings highlight the complex interplay between speech perception and production in dysphasia.