Oct 2, 2020

Separable influences of reward on visual processing and choice

BioRxiv : the Preprint Server for Biology
Alireza SoltaniT. Moore

Abstract

Primate vision is characterized by constant, sequential processing and selection of visual targets to fixate. Although expected reward is known to influence both processing and selection of visual targets, similarities and differences between these effects remains unclear mainly because they have been measured in separate tasks. Using a novel paradigm, we simultaneously measured the effects of reward outcomes and expected reward on target selection and sensitivity to visual motion in monkeys. Monkeys freely chose between two visual targets and received a juice reward with varying probability for eye movements made to either of them. Targets were stationary apertures of drifting gratings, causing the endpoints of eye movements to these targets to be systematically biased in the direction of motion. We used this motion-induced bias as a measure of sensitivity to visual motion on each trial. We then performed different analyses to explore effects of objective and subjective reward values on choice and sensitivity to visual motion in order to find similarities and differences between reward effects on these two processes. Specifically, we used different reinforcement learning models to fit choice behavior and estimate subjective re...Continue Reading

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Mentioned in this Paper

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Patterns
Genome
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Dysequilibrium Syndrome
Recombination, Genetic
Nucleic Acid Sequencing
Drosophila
Haploid Cell
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