A molecular description of profile analysis: decision weights and internal noise.
Systematic inefficiencies and internal noise in a spectral profile discrimination task were investigated. Listeners detected a 1000-Hz sinusoid added in-phase to the central component of a complex consisting of 11 equal-intensity sinusoids. Parameters for a channel model that employs decision weights and internal noise were estimated with molecular psychophysical techniques. Maximum likelihood predictions of the model were generally within a few decibels of observed thresholds. The degree to which an assumption of ideal weights leads to overestimation of internal noise was also assessed.
Department of Cognitive Science, University of California, Irvine, California 92697, USA. bgberg@uci.edu
Bruce G
BG
Berg
D000328:Adult; D001288:Attention; D001309:Auditory Threshold; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008297:Male; D008958:Models, Molecular; D008962:Models, Theoretical; D010470:Perceptual Masking; D010897:Pitch Discrimination; D011571:Psychoacoustics; D017603:Signal Detection, Psychological; D013018:Sound Spectrography