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Test-retest variability in testing hearing of speech.

E C Hughes, R H Arthur, R L Johnson

    Journal of the American Auditory Society
    |July 1, 1979
    PubMed
    Summary
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    Repeatability of W-22 word recognition tests is lower at lower sensation levels for individuals with hearing loss. More tests are needed for reliable results at these lower speech reception threshold (SRT) levels.

    Area of Science:

    • Audiology
    • Speech-Language Pathology
    • Hearing Science

    Background:

    • Assessing speech recognition is crucial for diagnosing hearing loss.
    • The W-22 word recognition test is a standard tool.
    • Understanding test repeatability is essential for reliable clinical interpretation.

    Purpose of the Study:

    • To evaluate the repeatability of the W-22 word recognition test.
    • To determine test reliability at various sensation levels in quiet and noise.
    • To assess repeatability in subjects with sensorineural hearing loss.

    Main Methods:

    • Tested 28 subjects with sensorineural hearing loss.
    • Administered W-22 tests at speech reception threshold (SRT) + 5 to 30 dB.
    • Included conditions in quiet and white noise (S/N = 0 and 7 dB).

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  • Measured test-retest standard deviations at different sensation levels.

    • Main Results:

    • Standard deviations ranged from 9% to 13% at lower sensation levels (SRT + 5 to 30 dB).
    • Standard deviation was less than 8% at SRT + 40 dB.
    • Lower variability at SRT + 40 dB allows confidence in the average of two measurements.

    Conclusions:

    • Higher sensation levels (e.g., SRT + 40 dB) demonstrate better W-22 test repeatability.
    • Increased testing is necessary for equivalent confidence at lower sensation levels.
    • A protocol is proposed to address the need for more tests at lower sensation levels.