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Journal of Speech, Language, and Hearing Research Vol.50 865-877 August 2007. doi:10.1044/1092-4388(2007/061)
© American Speech-Language-Hearing Association
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Auditory Performance Characteristics of the Computerized Revised Token Test (CRTT)

Cynthia A. Eberwein
VA Pittsburgh Healthcare System, Pittsburgh, PA, and University of Pittsburgh

Sheila R. Pratt
Geriatric Research Education and Clinical Center, VA Pittsburgh Healthcare System, and University of Pittsburgh

Malcolm R. McNeil
Tepanta R. D. Fossett
VA Pittsburgh Healthcare System and University of Pittsburgh

Neil J. Szuminsky
VA Pittsburgh Healthcare System and Necessity Consulting, Mars, PA

Patrick J. Doyle
Geriatric Research Education and Clinical Center, VA Pittsburgh Healthcare System, and University of Pittsburgh

Contact author: Cynthia A. Eberwein, VA Pittsburgh Healthcare System, Audiology and Speech Pathology, 7180 Highland Drive, Pittsburgh, PA 15206. E-mail: Cynthia.Eberwein{at}va.gov.

Purpose: To assess the Computerized Revised Token Test (CRTT) performance of individuals with normal hearing under several intensity conditions and under several spectral and temporal perturbation conditions.

Method: Sixty normal-hearing listeners were randomly assigned to 1 of 3 groups. Group 1 provided performance-intensity information about CRTT performance using uncompressed acoustic stimuli. Groups 2 and 3 completed the CRTT using temporally and spectrally compressed and expanded stimuli. CRTT performance functions were plotted for each group.

Results: Group 1 required minimal audibility to perform maximally on this task. As expected, Groups 2 and 3 showed significant differences across subtests, regardless of distortion condition. Mean differences in performance between successive conditions for Group 2 increased beyond 40% time compressed. There was 1 significant difference for the time-expanded condition. There were no differences across frequency compressed and expanded conditions.

Conclusion: Young listeners require limited signal gain on the CRTT to achieve maximum performance. Time and frequency compression and expansion results were consistent with previous findings with varying types of speech stimuli. The results have implications for administration and interpretation of the CRTT administered to persons from other populations and will help in the development of a normative database for the CRTT.

KEY WORDS: language comprehension, auditory processing, auditory comprehension, auditory processing disorder


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