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Speech-discrimination scores modeled as a binomial variable.

A R Thornton·M J Raffin
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Abstract

Many studies have reported variability data for tests of speech discrimination, and the disparate results of these studies have not been given a simple explanation. Arguments over the relative merits of 25- vs 50-word tests have ignored the basic mathematical properties inherent in the use of percentage scores. The present study models performance on clinical tests of speech discrimination as a binomial variable. A binomial model was developed, and some of its characteristics were tested against data from 4120 scores obtained on the CID Auditory Test W-22. A table for determining significant deviations between scores was generated and compared to observed differences in half-list scores for the W-22 tests. Good agreement was found between predicted and observed values. Implications of the binomial characteristics of speech-discrimination scores are discussed.

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HumansModels, PsychologicalProbabilityPsychometricsSpeech Discrimination TestsJournal Article

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A R Thornton, M J Raffin. 1978. Speech-discrimination scores modeled as a binomial variable.. https://doi.org/10.1044/jshr.2103.507

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