Journal article
Binocular rivalry with isoluminant stimuli visible only via short-wavelength-sensitive cones
Vision Research, Vol.36(11), pp.1561-1571
1996
Abstract
To test whether the binocular contour rivalry mechanism is tritanopic, we presented isoluminant, rival stimuli visible only via the short-wavelength-sensitive (S) cones. We stimulated only the S cones with violet gratings superimposed on a bright yellow field that adapted the responses of the middle- and long-wavelength-sensitive (M and L) cones. We found that an S cone grating presented to one eye rivalled with an orthogonal grating presented to the other. Rivalry persisted over a range of luminances and contrasts of the S-cone stimuli, and was greater than could be accounted for by nonrival fading. The spatial spread of rivalry from S-cone stimuli is similar to that for the same stimuli when visible also to the M and L cones (luminance stimuli). We found that an S-cone stimulus would rival with a luminance stimulus, and exploited this to determine the equivalent luminance contrast of S-cone stimuli by putting them in a rivalry competition with luminance stimuli. For rivalry, the equivalent luminance contrast of isoluminant, S-cone stimuli is much less than their S-cone contrast. The existence of rivalry with isoluminant stimuli, along:with earlier evidence that such stimuli can support stereopsis, challenges the view that an achromatic channel alone drives certain higher level functions such as depth perception.
Details
- Title
- Binocular rivalry with isoluminant stimuli visible only via short-wavelength-sensitive cones
- Authors/Creators
- R.P. O'Shea (Author/Creator)D.R. Williams (Author/Creator)
- Publication Details
- Vision Research, Vol.36(11), pp.1561-1571
- Publisher
- Elsevier Ltd
- Identifiers
- 991005540383007891
- Copyright
- © 1996 Elsevier Science Ltd.
- Murdoch Affiliation
- School of Psychology and Exercise Science
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.7 Neuroscanning
- 1.7.203 Visual Perception
- Web Of Science research areas
- Neurosciences
- Ophthalmology
- Psychology
- ESI research areas
- Neuroscience & Behavior