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Updated: Jun 28, 2026
Measuring Attention and Visual Processing Speed by Model-based Analysis of Temporal-order Judgments
Published on: January 23, 2017
A population-coding model of attention's influence on contrast response: Estimating neural effects from
Franco Pestilli1, Sam Ling, Marisa Carrasco
1Department of Neuroscience, Columbia University, New York, NY 10032, USA. franco.pestilli@columbia.edu
Abstract:
Human psychophysics and monkey physiology studies have shown that attention modulates early vision - contrast sensitivity and processing. But how can we bridge the effects of attention on perceptual performance to their neural underpinnings? Here we implement a population-coding model that estimates attentional effects on population contrast response given psychophysical data. Model results show that whereas endogenous (sustained, voluntary) attention changes population contrast-response via contrast gain, exogenous (transient, involuntary) attention changes population contrast-response via response gain.
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