This proposal will use psychophysical and psychophysiological procedures to study binocular rivalry, the breakdown in stable binocular single vision resulting from discordant monocular inputs. During rivalry the eyes convey contradictory information to the brain about the nature of objects at given locations in visual space. Faced with rival interpretations, the brain lapses into an unstable state characterized by alternating periods of monocular dominance that continue as long as the eyes view discordant stimuli. The study of rivalry has bearing on several key issues in vision science including the possible neural bases of strabismic suppression, the principles of perceptual organization, neural mechanisms involved in fusion and stereopsis, and possible neural concomitants of conscious visual awareness. Interest in rivalry has grown in recent years, but several important issues remain unresolved, issues that bear importantly on the nature and locus of binocular rivalry. The proposed work will study several of these: a) what actually rivals during rivalry, competing stimulus interpretations or conflicting image features associated with left and right eyes, b) the role of global context in determining the temporal dynamics of rivalry, c) the extent to which a stimulus suppressed from vision can still contribute to perceptual grouping and scene interpretation, and d) whether rivalry is affected when dissimilar monocular stimulation is consistent with ecologically valid stimulus conditions. Using several different techniques (test probe procedure, startle reflex, tracking procedure, forced-choice testing), the proposed experiments are intended to resolve outstanding controversies concerning rivalry, including the """"""""eye"""""""" vs. """"""""stimulus"""""""" accounts of rivalry. In addition, results from these proposed experiments will provide guidance to neurophysiologists and cognitive neuro scientists seeking to discover the actual neural concomitants of rivalry.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Research Project (R01)
Project #
5R01EY013358-04
Application #
6723725
Study Section
Visual Sciences B Study Section (VISB)
Program Officer
Oberdorfer, Michael
Project Start
2001-04-10
Project End
2006-02-28
Budget Start
2004-04-01
Budget End
2006-02-28
Support Year
4
Fiscal Year
2004
Total Cost
$117,055
Indirect Cost
Name
Vanderbilt University Medical Center
Department
Psychology
Type
Schools of Arts and Sciences
DUNS #
004413456
City
Nashville
State
TN
Country
United States
Zip Code
37212
Patel, Vaama; Stuit, Sjoerd; Blake, Randolph (2015) Individual differences in the temporal dynamics of binocular rivalry and stimulus rivalry. Psychon Bull Rev 22:476-82
Brascamp, Jan W; Blake, Randolph (2012) Inattention abolishes binocular rivalry: perceptual evidence. Psychol Sci 23:1159-67
Chopin, Adrien; Mamassian, Pascal; Blake, Randolph (2012) Stereopsis and binocular rivalry are based on perceived rather than physical orientations. Vision Res 63:63-8
Ling, Sam; Blake, Randolph (2012) Normalization regulates competition for visual awareness. Neuron 75:531-40
Yang, Eunice; Blake, Randolph (2012) Deconstructing continuous flash suppression. J Vis 12:8
Kang, Min-Suk; Blake, Randolph; Woodman, Geoffrey F (2011) Semantic analysis does not occur in the absence of awareness induced by interocular suppression. J Neurosci 31:13535-45
Blake, Randolph; Wilson, Hugh (2011) Binocular vision. Vision Res 51:754-70
Knapen, Tomas; Brascamp, Jan; Pearson, Joel et al. (2011) The role of frontal and parietal brain areas in bistable perception. J Neurosci 31:10293-301
Yang, Eunice; Blake, Randolph; McDonald 2nd, James E (2010) A new interocular suppression technique for measuring sensory eye dominance. Invest Ophthalmol Vis Sci 51:588-93
Kang, Min-Suk; Lee, Sang-Hun; Kim, June et al. (2010) Modulation of spatiotemporal dynamics of binocular rivalry by collinear facilitation and pattern-dependent adaptation. J Vis 10:3

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