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Related Experiment Video

Updated: May 28, 2026

Training Synesthetic Letter-color Associations by Reading in Color
10:27

Training Synesthetic Letter-color Associations by Reading in Color

Published on: February 20, 2014

Is there a lateralized category effect for color?

Christoph Witzel1, Karl R Gegenfurtner

  • 1Department of Psychology, University of Giessen, Giessen, Germany. Christoph.Witzel@psychol.uni-giessen.de

Journal of Vision
|October 25, 2011
PubMed
Summary
This summary is machine-generated.

Color category effects on perception are not lateralized, contrary to previous findings. Replicated experiments show consistent effects across both visual fields, challenging earlier links to language lateralization.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The lateralized category effect for color suggests color perception is influenced by category borders, with stronger effects in the right visual field.
  • This effect was previously linked to the hemispheric lateralization of language.

Purpose of the Study:

  • To re-evaluate the lateralized category effect for color.
  • To investigate whether category effects in color perception are lateralized to a specific visual field.

Main Methods:

  • Ten variations of two original experiments were conducted with 230 participants.
  • Stimulus color rendering was precisely controlled, and color categories were identified using a naming method.
  • Participants performed a visual search task involving color discrimination.

Main Results:

  • Reaction times were faster when discriminating between colors from different categories compared to colors within the same category.
  • This category effect was observed equally in both the left and right visual fields.
  • The results did not support the lateralization of color category effects.

Conclusions:

  • The study challenges the established lateralized category effect for color.
  • Color category effects in visual perception appear to be non-lateralized.
  • Previous associations between color category effects and language lateralization may need re-examination.