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Research Article

The development of psychometrically equivalent Cantonese speech audiometry materials

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Pages 191-201 | Received 21 Jun 2010, Accepted 19 Nov 2010, Published online: 14 Feb 2011
 

Abstract

Abstract

Objective: The aim of this study was to develop and psychometrically evaluate speech audiometry materials that can be used to measure word recognition (WR) and speech recognition testing (SRT) in quiet for native speakers of Cantonese. Study Sample: Commonly used bisyllabic and trisyllabic Cantonese words were digitally recorded by native male and female talkers and then evaluated by twenty normal-hearing Cantonese listeners. Design: The recorded bisyllabic words were psychometrically evaluated and arranged into four WR lists and eight half-lists that are relatively homogeneous in audibility. Using logistic regression, SRT materials were developed by selecting 28 trisyllabic words with relatively steep psychometric functions and digitally adjusting their intensity to match the listeners’ mean pure-tone average. Result: The mean psychometric slopes for the WR materials were 7.5%/dB for the male talker and 7.6%/dB for the female talker, with no statistically significant differences between the lists or half-lists. At intensity levels required for 50% intelligibility, the mean psychometric slopes of the male and female talker SRT materials were 14.5%/dB and 14.9 %/dB, respectively. Conclusion: High-quality digital recordings of Cantonese speech audiometric WR and SRT materials were developed and validated in this study. These materials are available on compact disc, indexed by talker gender.

Sumario

Objetivo: El propósito de este estudio fue desarrollar y evaluar psicométricamente materiales de lenguaje que puedan utilizarse en reconocimiento de palabras (WR) y en pruebas de reconocimiento del lenguaje (SRT) en silencio para hablantes nativos del cantonés. Muestra del estudio: Se grabaron digitalmente palabras bisilábicas y trisilábicas comúnmente usadas en cantonés, usando hablantes nativos, masculinos y femeninos, que luego fueron evaluadas por veinte sujetos de origen cantonés con audición normal. Diseño: Las palabras bisilábicas grabadas fueron evaluadas psicométricamente y dispuestas en cuatro listas para WR y en 8 medias listas que eran relativamente homogéneas en cuanto a audibilidad. Usando regresión logística, se desarrollaron materiales para SRT por medio de la selección de 28 palabras trisilábicas con funciones audiométricas relativamente empinadas y ajustando la intensidad digitalmente para equipararse con el promedio tonal puro de los evaluadores. Resultados: La pendiente psicométrica media de los materiales para WR fue de 7.5%/dB para hablantes masculinos y de 7.6%/dB para hablantes femeninas, sin ninguna diferencia estadísticamente significativa entre las listas y las medias listas. A la intensidad requerida para el 50% de inteligibilidad, las pendientes psicométricas medias de los materiales para SRT, con hablantes masculinos y femeninos, fueron de 14.5%/dB y 14.9 %/dB, respectivamente. Conclusión: Se desarrollaron grabaciones digitales de alta calidad para materiales audiométricos en cantonés para WR y SRT, y se validaron en este estudio. Estos materiales están disponibles en disco compacto, y clasificados por el género del hablante.

Acknowledgements

This project was made possible by funding from the David O. McKay School of Education at Brigham Young University. We would also like to thank our research assistants Wallace Chan and Ching Yin Ma, and all the participants who contributed their time to this study.

Declaration of Interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.

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