Journal article

Changes in expectation consequent on experience, modeled by a simple, forgetful neural circuit

Andrew J Anderson, RHS Carpenter

JOURNAL OF VISION | ASSOC RESEARCH VISION OPHTHALMOLOGY INC | Published : 2006

Abstract

Our expectation of an event such as a visual stimulus clearly depends on previous experience, but how the brain computes this expectation is currently not fully understood. Because expectation influences the time to respond to a stimulus, we arranged for the probability of a visual target to suddenly change and found that the time taken to make an eye movement to it then changed continuously, eventually stabilizing at a level reflecting the new probability. The time course of this change can be modeled making a simple assumption: that the brain discounts old information about the probability of an event by a factor lambda, relative to new information. The value of lambda presumably represent..

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