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Linguistic processing and reaction time differences in stutterers and nonstutterers.

C R Hand, W O Haynes

    Journal of Speech and Hearing Research
    |June 1, 1983
    PubMed
    Summary

    Adult male stutterers show a right hemisphere preference for language tasks, unlike non-stutterers. This study explored hemispheric differences in stuttering using a lexical decision task and reaction times.

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    Area of Science:

    • Neuroscience
    • Psycholinguistics
    • Speech and Language Pathology

    Background:

    • Stuttering is a complex speech disorder with potential neurological underpinnings.
    • Hemispheric specialization for linguistic processing is well-established, with the left hemisphere typically dominant.

    Purpose of the Study:

    • To investigate hemispheric differences in linguistic processing between adult male stutterers and non-stutterers.
    • To examine the role of the right hemisphere in stuttering.

    Main Methods:

    • A lexical decision task involving tachistoscopic presentation of real and non-word stimuli to visual hemifields.
    • Measurement of vocal and manual reaction times to assess hemispheric participation and response modes.

    Main Results:

    • The stuttering group demonstrated a left visual field advantage, suggesting right hemisphere preference for this linguistic task.
    • Stutterers exhibited slower vocal and manual reaction times compared to non-stutterers.

    Conclusions:

    • Findings suggest atypical hemispheric lateralization for language processing in adult male stutterers.
    • Results may have implications for understanding the neural basis of stuttering and laryngeal dysfunction hypotheses.

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