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Original Article

Reliability of Auditory Function Tests in Severely Hearing-Impaired and Deaf Subjects

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Pages 453-466 | Published online: 07 Jul 2009
 

Abstract

The test-retest variability of a series of auditory functions has been investigated in a group of severely hearing-impaired and deaf subjects (64 ears, median Fletcher index: 80 dB) and in a group of 10 controls with normal hearing. An adaptive forced-choice procedure was used for both groups. The functions were: tone audiogram, difference limen for intensity, difference limen for frequency, modulation transfer function and critical ratio. In spite of sometimes strongly deviating function values within the hearing-impaired group, the test-retest variability of the two groups was found to be of the same order of magnitude, except for the tone audiogram where the variability in the hearing-impaired group was twice that for the control group.

Nous avons examiné la variabilité des mesures répétées de quelques fonctions auditives dans un groupe de sujets ayant des troubles auditifs importants (64 oreilles; médiane de l'index de Fletcher 80 dB). Par comparaison nous avons aussi examiné un groupe de 10 sujets ayant une audition normale. Dans les deux groupes nous avons utilisé une procédure adaptive et de choix forcé. Nous avons examiné les seuils auditifs, les seuils différentiels d'intensité et de fréquence, la fonction de transfert de modulation et le rapport critique. Malgré les anomalies majeures du groupe des malentendants, la variabilité des mesures dans les deux groupes est équivalente, à l'exception de la variabilité des seuils auditifs qui est deux fois plus grande chez les malentendants.

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