Abstract
In studies of auditory detection and discrimination, psychometric functions not only describe listeners sensitivity to changes in the stimulus, but often provide information regarding the auditory neural coding mechanisms involved in these tasks. In the present study, psychometric functions for frequency discrimination were systematically measured with a group of normal-hearing young adults. Frequency difference limens were in agreement with previous reports in their dependence on frequency. On the other hand, unlike that implied in previous analyses, the slopes of the psychometric functions, expressed in log(d) versus log(ΔF), were found to be consistently shallower than unity at frequencies below 4 kHz. Only at higher frequencies did the slopes average around unity. These results will be discussed in light of auditory neural computational models based on either place or temporal coding. [Work supported by the Division of Communication Disorders, University of Wyoming.]
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