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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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Reward Rapidly Enhances Visual Perception.

Phillip Xin Cheng1, Anina N Rich2,3, Mike E Le Pelley4

  • 1Department of Psychological and Brain Sciences, Boston University.

Psychological Science
|November 11, 2021
PubMed
Summary
This summary is machine-generated.

High reward rapidly enhances visual perception, even for stimuli we don't consciously see. This reward modulation of perception suggests faster processing of important visual information.

Keywords:
consciousnessopen dataopen materialsperceptual learningrewardvisual perception

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Area of Science:

  • Cognitive Neuroscience
  • Visual Perception
  • Decision Making

Background:

  • Rewards significantly influence human cognition and behavior.
  • Understanding the precise timing and mechanisms of reward's influence on perception is crucial.

Purpose of the Study:

  • To investigate if reward information can rapidly modulate perceptual encoding of visual information.
  • To determine if this modulation occurs even for stimuli not consciously perceived.
  • To differentiate between reward's effect on encoding versus retrieval.

Main Methods:

  • Participants encoded briefly presented, masked visual stimuli (gratings) associated with varying reward levels.
  • Response accuracy was measured under conditions where reward information was available during encoding or retrieval.
  • Stimuli were presented briefly to probe unconscious processing.

Main Results:

  • Response accuracy improved when visual stimuli signaled high reward during encoding, particularly for unconsciously perceived stimuli.
  • No accuracy difference was observed when reward information was provided at retrieval, suggesting encoding-specific effects.
  • Findings indicate rapid reward modulation of visual perception, independent of conscious awareness.

Conclusions:

  • Reward can rapidly modulate visual perception during the encoding stage.
  • This modulation can occur even for stimuli processed outside of conscious awareness.
  • The findings support a model where reward influences early visual processing, not just motivated retrieval.