Related Experiment Video
Updated: Oct 4, 2025
07:13
A Two-interval Forced-choice Task for Multisensory Comparisons
Published on: November 9, 2018
11.1K
Influence of Stimulus Size on Simultaneous Chromatic Induction
Tama Kanematsu1,2, Kowa Koida1,3
1Department of Computer Science and Engineering, Toyohashi University of Technology, Toyohashi, Japan.
Frontiers in Psychology
|February 10, 2022
Summary
This study reveals how the spatial extent of chromatic backgrounds influences color appearance. Optimal widths for center lines and contours were identified, suggesting neural factors dominate color shifts over optical ones.
Area of Science:
- Visual perception
- Color science
- Neuroscience
Background:
- Chromatic induction significantly impacts color appearance.
- Patterned backgrounds are known to cause strong chromatic induction.
- The role of spatial extent in chromatic induction (contrast vs. assimilation) remains unclear.
Purpose of the Study:
- Investigate how the width of a center line and its flanking white contour affect color appearance.
- Determine the influence of spatial extent on chromatic induction effects.
- Differentiate between neural and optical factors in color shifts.
Main Methods:
- Experimentally manipulated the width of a center line and its surrounding white contour.
- Presented stimuli against L/M-cone and S-cone chromatic backgrounds.
- Analyzed color shifts in the center line's appearance.
Main Results:
- A significant color shift was observed with white contours on L/M- and S-cone backgrounds.
- Optimal widths varied for center lines and contours across chromaticities.
- Color appearance integrated broad chromatic and fine luminance information.
Conclusions:
- Neural mechanisms, not optical ones, are the primary drivers of observed color shifts.
- Findings provide insights into the spatial processing of color and luminance information.
- The study clarifies the spatial extent's role in chromatic induction.
Related Concept Videos
01:24Color Vision
820
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.
820
01:22Photoreceptors and Visual Pathways
6.7K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.7K