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Stuttering and speech naturalness: some additional data.

R J Ingham, M Gow, J M Costello

    The Journal of Speech and Hearing Disorders
    |May 1, 1985
    PubMed
    Summary
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    Listeners rated speech from stutterers and normally fluent speakers. Despite similar identification rates, stutterers' speech was perceived as significantly less natural sounding on a 9-point scale.

    Area of Science:

    • Speech-Language Pathology
    • Psychoacoustics
    • Linguistic Perception

    Background:

    • Assessing speech naturalness is crucial for evaluating fluency.
    • Previous studies have yielded varied results on listener perceptions of stuttered speech.
    • The impact of prolonged speech treatment on perceived naturalness requires further investigation.

    Purpose of the Study:

    • To evaluate listener perceptions of speech naturalness in individuals who stutter post-treatment.
    • To compare listener judgments of speech naturalness with speaker identification accuracy.
    • To reevaluate findings from Ingham and Packman (1978) using contemporary speech samples.

    Main Methods:

    • Thirty listeners rated 1-minute spontaneous speech samples from 15 normally fluent speakers and 15 treated stutterers.

    Related Experiment Videos

  • A 9-point speech naturalness rating scale (Martin et al., 1984) was employed.
  • Listeners also performed a binary task to identify speakers as stutterers or normal speakers.

    • Main Results:

    • Listener identification accuracy for stutterers versus normal speakers was nearly identical.
    • Stutterers received significantly higher scores on the speech naturalness rating scale, indicating less natural-sounding speech.
    • Perceived naturalness ratings differed significantly between the two speaker groups.

    Conclusions:

    • Listeners can identify stuttered speech, but perceived naturalness ratings provide a more sensitive measure of speech quality post-treatment.
    • Speech naturalness perception is a key factor in evaluating the efficacy of stuttering interventions.
    • Findings contribute to a deeper understanding of auditory-perceptual judgments in stuttering research.