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Related Concept Videos

Color Vision01:24

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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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Related Experiment Video

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Visualizing Visual Adaptation
04:43

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Published on: April 24, 2017

Object knowledge modulates colour appearance.

Christoph Witzel1, Hanna Valkova, Thorsten Hansen

  • 1Department of Psychology, University of Giessen, Otto-Behaghel-Straße 10F, 35394 Giessen, Germany;

I-Perception
|November 13, 2012
PubMed
Summary
This summary is machine-generated.

Learned knowledge of object colors influences how we perceive object colors, a phenomenon known as the memory color effect. This effect is particularly noticeable for artificial objects along the daylight axis.

Keywords:
Artificial ObjectsColour AppearanceColour DiagnosticityDaylight VariationMemory ColoursObject ColoursPast ExperiencePrior Knowledge

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Neuroscience

Background:

  • The memory color effect describes how prior knowledge of an object's typical color influences its perceived color.
  • Investigating this effect with artificial objects allows for controlled study of learned object knowledge's impact on color appearance.
  • Understanding this interaction is crucial for high-level vision and the role of experience in perception.

Purpose of the Study:

  • To investigate the memory color effect in artificial objects with learned color associations.
  • To determine how acquired object knowledge influences color perception.
  • To explore the interaction between object and color information in visual processing.

Main Methods:

  • Developed a reaction time paradigm to measure the color diagnosticity of artificial objects.
  • Participants adjusted sixteen artificial objects to their typical color and to a neutral gray.
  • Analyzed color adjustments to assess the influence of typical color knowledge on perceived color.

Main Results:

  • Found that knowledge of an object's typical color significantly influences its perceived color.
  • The memory color effect was particularly pronounced along the daylight axis.
  • Participants adjusted objects to their typical color when attempting to perceive them as gray.

Conclusions:

  • Acquired knowledge about object colors demonstrably affects color appearance.
  • The memory color effect plays a role in how we visually process familiar objects.
  • This research contributes to understanding the interplay of learning, experience, and perception in vision.