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.
Berg
Bruce G
BG
Department of Cognitive Science, University of California, Irvine, California 92697, USA. bgberg@uci.edu
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