Gleich, Otto and Hamann, Ingo and Kittel, Malte C. and Klump, Georg M. and Strutz, Jürgen (2006) A quantitative analysis of psychometric functions for different auditory tasks in gerbils. Hearing research 220 (1-2), pp. 27-37.
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The psychometric function relates the probability of a correct response to the variation of a physical stimulus parameter. In many perceptual tasks one point on this function is defined by a more or less arbitrary threshold criterion and threshold is used to study the effects of various treatments or age. Besides threshold, the shape of the psychometric function provides additional information. The variability of internal (neural) noise and the sensorineural transduction function will affect the shape of the psychometric function and may, therefore, reveal important features in the processing of stimulus characteristics. Here we analyze the effect of age on psychometric functions from gerbils: (A) for the detection of a tone or noise pulse in silence which is generally regarded as a measure of cochlear function and (B) for a gap detection task, investigating aspects of temporal processing that involve the ascending auditory pathway. Our data show that the slope of the psychometric function for the detection of tone and noise pulses in silence is independent of age and threshold. In contrast, the steepness of the psychometric function is decreased in gerbils with impaired temporal resolution. We discuss these observations in the context of physiological data from young and old animals.
|Institutions:||Medicine > Lehrstuhl für Hals-Nasen-Ohren-Heilkunde|
|Subjects:||500 Science > 570 Life sciences|
500 Science > 590 Zoological sciences
600 Technology > 610 Medical sciences Medicine
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||18 Jun 2009 14:33|
|Last Modified:||05 Aug 2009 13:57|