HRC Seminar: John Rinzel

10:30 am on Friday, November 3, 2017
1:00 pm on Friday, November 3, 2017
610 Commonwealth Avenue, Room 101
Title: Auditory streaming and perceptual bistability. Abstract: When experiencing an ambiguous sensory stimulus (e.g., the faces-vase image), subjects may report random alternations (time scale, seconds) between the possible interpretations. I will describe dynamical models for neuronal populations that compete for dominance through mutual inhibition, influenced by slow adaptation and noise. In highly idealized formulations network units are percept specific without direct representation of stimulus features. Our psychophysical experiments and modeling involve perception of ambiguous auditory stimuli. The models incorporate feature specificity, tonotopically organized inputs and receptive fields, so that perceptual selectivity is emergent rather than built-in. Our model addresses the effects of selective attention, distractors and deviants as well as the transient build-up phase of sound source segregation as when entering a cocktail party.