Ear and hearing · 2026
Test-Retest Reliability Bounds for Consonant-Nucleus-Consonant Word and Phoneme Scores for Cochlear-Implant Users.
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Phatak Sandeep A, Bernstein Joshua G W
Аннотация
OBJECTIVES: This report establishes test-retest 95% confidence interval bounds for consonant-vowel-consonant (CNC) word- and phoneme-recognition scores for cochlear-implant listeners.
DESIGN: Data from two published cochlear-implant studies were analyzed. Across-list SDs for individual subjects were compared with the expected SD for a binomially distributed variable. The model was adjusted by tuning the effective binomial distribution set size to minimize the root-mean-square deviation from measured SDs.
RESULTS: The effective CNC-word set size equaled the number of words per list (50). The effective phoneme set size (approximately 100) was lower than the number of phonemes per list (150).
CONCLUSIONS: Results support the hypotheses that individual CNC words are recognized independently, and that there is mutual information across phonemes, resulting in a smaller effective set size. A table of confidence intervals and critical-difference values for CNC word and phoneme recognition is provided.
DESIGN: Data from two published cochlear-implant studies were analyzed. Across-list SDs for individual subjects were compared with the expected SD for a binomially distributed variable. The model was adjusted by tuning the effective binomial distribution set size to minimize the root-mean-square deviation from measured SDs.
RESULTS: The effective CNC-word set size equaled the number of words per list (50). The effective phoneme set size (approximately 100) was lower than the number of phonemes per list (150).
CONCLUSIONS: Results support the hypotheses that individual CNC words are recognized independently, and that there is mutual information across phonemes, resulting in a smaller effective set size. A table of confidence intervals and critical-difference values for CNC word and phoneme recognition is provided.