<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>The strength of chromatic after-effect was studied using the filling-in after-effect image illusion (Van Lier <italic>et al.</italic>). In our experiments, two stimuli, each consisting of round and sharp-edged overlapping chromatic shapes, were presented to the subjects for 1.2 s on both sides of the fixation point. After that the empty shapes of the stimuli appeared for 0.6 s, and in the next 0.6 s changed the orientation on both sides of the fixation point thus changing the after-effect color from side to side. The subjects made judgments about the strength of the perceived after-effect on a ten-grade scale for different color pairs. The color of one stimulus was kept constant, while the color of the other was changed; as a result of color changes of both stimuli 192 color pairs in total were formed. Some of them were found to arouse a powerful sensation of the after-effect with a color not directly arranged on the opposite axis of chromaticity diagram. Blue and yellow colors were valued as creating the most pronounced after-effect.</p></abstract>

The strength of chromatic after-effect was studied using the filling-in after-effect image illusion (Van Lier et al.). In our experiments, two stimuli, each consisting of round and sharp-edged overlapping chromatic shapes, were presented to the subjects for 1.2 s on both sides of the fixation point. After that the empty shapes of the stimuli appeared for 0.6 s, and in the next 0.6 s changed the orientation on both sides of the fixation point thus changing the after-effect color from side to side. The subjects made judgments about the strength of the perceived after-effect on a ten-grade scale for different color pairs. The color of one stimulus was kept constant, while the color of the other was changed; as a result of color changes of both stimuli 192 color pairs in total were formed. Some of them were found to arouse a powerful sensation of the after-effect with a color not directly arranged on the opposite axis of chromaticity diagram. Blue and yellow colors were valued as creating the most pronounced after-effect.

Strength Evaluation of Filling-In Color Illusion

Department of Optometry and Vision Science, University of Latvia, 8 Kengaraga Str., Riga, LV-1063, LATVIA

Latvian Journal of Physics and Technical Sciences

{"article-title":"Strength Evaluation of Filling-In Color Illusion"}

The strength of chromatic after-effect was studied using the filling-in after-effect image illusion (Van Lier et al.). In our experiments, two stimuli, each...

Strength Evaluation of Filling-In Color Illusion

Published Online: Jul 16, 2010

Page range: 44 - 50

DOI: https://doi.org/10.2478/v10047-010-0014-1

This content is open access.