14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Warping Auditory Perceptual Space with Categorization and Discrimination Training

Frank H. Guenther (1,2), Fatima T. Husain (1)

(1) Department of Cognitive and Neural Systems, Boston University, USA
(2) Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA

This paper investigates the effects of two different kinds of training on auditory perceptual space. It is first shown that categorization training, in which subjects learn to identify stimuli within a particular frequency range as members of the same category, leads to a decrease in sensitivity (as measured by d') to stimuli in that category. This phenomenon is an example of acquired similarity for a category-relevant dimension. Discrimination training with the same set of stimuli was shown to have the opposite effect: subjects became more sensitive to differences in the stimuli presented during training. Further experiments investigated some of the conditions that are necessary to generate the acquired similarity found in the first experiment. The results of these experiments are interpreted using a neural network model of auditory map formation in the central nervous system.

Full Paper

Bibliographic reference.  Guenther, Frank H. / Husain, Fatima T. (1999): "Warping auditory perceptual space with categorization and discrimination training", In ICPhS-14, 2061-2064.