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Spondee recognition threshold as a function of set size.

J L Punch, M T Howard

    The Journal of Speech and Hearing Disorders
    |May 1, 1985
    PubMed
    Summary
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    Reducing the number of spondaic words tested significantly lowers recognition thresholds in normal hearing listeners. This finding impacts speech perception research and audiology test development.

    Area of Science:

    • Auditory perception
    • Human information processing
    • Speech recognition

    Background:

    • Spondaic words are commonly used in audiology to assess speech recognition thresholds.
    • Varying the number of potential stimuli (set size) may influence listener performance.
    • Understanding factors affecting recognition thresholds is crucial for accurate hearing assessments.

    Purpose of the Study:

    • To investigate the effect of set size on recognition thresholds for spondaic words.
    • To determine if reducing the number of spondees impacts auditory perception.
    • To explore the relationship between set size and information processing load.

    Main Methods:

    • Normal hearing listeners participated in the study.
    • Six sets of spondaic words were created, ranging from 36 to 3 words.

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  • Recognition thresholds were measured under varying set size conditions.

    • Main Results:

    • A systematic decrease in mean recognition threshold was observed as set size was reduced.
    • Thresholds decreased from 19.1 dB SPL (36 words) to 12.2 dB SPL (3 words).
    • Results align with information processing theories, showing a linear increase in threshold with stimulus complexity.

    Conclusions:

    • Set size is a significant factor influencing spondaic word recognition thresholds.
    • Smaller set sizes yield lower and potentially more reliable recognition thresholds.
    • Findings have implications for optimizing speech audiometry procedures and test design.