A population-coding model of attention's influence on contrast response: Estimating neural effects from psychophysical data

Franco Pestilli, Sam Ling, Marisa Carrasco

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)1144-1153
Number of pages10
JournalVision research
Volume49
Issue number10
DOIs
StatePublished - Jun 2 2009

Keywords

  • Attention
  • Attention model
  • Contrast gain
  • Population coding
  • Pshychophysics
  • Response gain

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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