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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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Visualizing Visual Adaptation
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Colors and Handles: How Action Primes Perception.

Marcello Costantini1,2, Davide Quarona3,4, Corrado Sinigaglia3,4

  • 1The Embodied Adaptive Mind Laboratory (TEAM Lab), Department of Psychological, Health and Territorial Sciences, University G. d'Annunzio, Chieti, Italy.

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Action shapes perception, even for non-action-related features like color. Performing a grasping action on a mug influenced color perception, demonstrating how acting on objects affects our experience.

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Area of Science:

  • Cognitive Psychology
  • Perception Science
  • Motor Control

Background:

  • The relationship between action and perception is complex.
  • It remains debated whether action influences perception of only action-relevant features or also unrelated features like color.

Purpose of the Study:

  • To investigate if performing an action (grasping) influences the perception of object features not directly related to the action, specifically color.
  • To determine the specificity of action's influence on perception.

Main Methods:

  • Participants repeatedly grasped a handled mug, hidden from view.
  • Following motor training, participants judged the color (blue vs. cyan) of a visually presented mug.
  • A control group performed a non-grasping touch action.

Main Results:

  • Motor training to grasp a mug selectively speeded up color judgments when the mug's handle was spatially aligned with the trained hand.
  • This action-specific priming effect on color perception was not observed after a non-grasping touch action.

Conclusions:

  • Action performance can significantly shape perceptual judgments, even for object features like color that do not directly afford the performed action.
  • This suggests a profound integration between motor actions and perceptual experiences, extending beyond action-relevant attributes.