Loading...
Effect of stimulus width on simultaneous contrast
Journal Title
PeerJ
Keywords
Readers/Advisors
Journal Title
Term and Year
Publication Date
2013-09-05
Book Title
Publication Volume
1
Publication Issue
Publication Begin
e146
Publication End
Number of pages
Collections
Files
Loading...
peerj-01-146.pdf
Adobe PDF, 814.89 KB
Research Projects
Organizational Units
Journal Issue
Abstract
Perceived brightness of a stimulus depends on the background against which the stimulus is set, a phenomenon known as simultaneous contrast. For instance, the same gray stimulus can look light against a black background or dark against a white background. Here we quantified the perceptual strength of simultaneous contrast as a function of stimulus width. Previous studies have reported that wider stimuli result in weaker simultaneous contrast, whereas narrower stimuli result in stronger simultaneous contrast. However, no previous research has quantified this relationship. Our results show a logarithmic relationship between stimulus width and perceived brightness. This relationship is well matched by the normalized output of a Difference-of-Gaussians (DOG) filter applied to stimuli of varied widths.
Citation
Shi V, Cui J, Troncoso XG, Macknik SL, Martinez-Conde S. Effect of stimulus width on simultaneous contrast. PeerJ. 2013 Sep 5;1:e146. doi: 10.7717/peerj.146. PMID: 24032092; PMCID: PMC3767278.