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Developmental differences in identifying and discriminating CV syllables

L L Elliott, C Longinotti, D Meyer

    The Journal of the Acoustical Society of America
    |September 1, 1981
    PubMed
    Summary
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    Age significantly impacts speech sound identification and discrimination, even among listeners with similar hearing abilities. Adults, unlike children, demonstrated distinct perceptual boundaries and just noticeable differences in speech sound tasks.

    Area of Science:

    • Psychoacoustics
    • Speech Perception
    • Developmental Psychology

    Background:

    • Auditory perception and speech understanding can be influenced by age.
    • Previous research indicates potential age-related changes in processing complex auditory stimuli.

    Purpose of the Study:

    • To investigate age-related differences in identifying and discriminating synthesized consonant-vowel syllables.
    • To examine the relationship between age and performance on speech sound identification and discrimination tasks.
    • To compare performance on synthesized versus natural speech stimuli across different age groups.

    Main Methods:

    • Utilized two 13-item continua varying in place of articulation ([ba, da, ga]) with and without initial noise bursts.
    • Employed adaptive procedures to estimate perceptual boundaries and just noticeable differences.

    Related Experiment Videos

  • Included tasks involving synthesized and digitized natural speech syllables.

    • Main Results:

    • Significant age-related effects were observed across all three tasks: syllable identification, boundary estimation, and discrimination.
    • Adults, but not six-year-olds in most conditions, showed significant differences between perceptual boundaries and just noticeable differences.
    • Performance with synthesized and natural speech stimuli was comparable across all age groups.

    Conclusions:

    • Age is a critical factor influencing the precision of speech sound perception, particularly in distinguishing subtle acoustic variations.
    • Developmental changes in auditory processing contribute to age-related differences in speech sound identification and discrimination.
    • The findings highlight the importance of considering age in models of speech perception and auditory development.