
	Where results make sense

Topic: Binocular rivalry

Related Topics

Binocular vision

Eye

Color constancy

Consciousness

Carnivora

In the News (Sat 19 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Encyclopedia topic: Binocular rivalry (Site not responding. Last check: 2007-11-06)
		Binocular rivalry is a phenomenon of visual perception (Perception by means of the eyes).
		When the images presented to the eyes differ only in their colours, rivalry is referred to as binocular colour (A visual attribute of things that results from the light they emit or transmit or reflect) rivalry.
		He regarded binocular rivalry as a special case in which fusion is impossible, saying "the mind is inattentive to impressions made on one retina when it cannot combine the impressions on the two retinae together so as to occasion a perception resembling that of some external object" (p.
	www.absoluteastronomy.com /encyclopedia/b/bi/binocular_rivalry.htm (1670 words)

	Binocular rivalry - Encyclopedia, History, Geography and Biography
		Binocular rivalry is a phenomenon of visual perception in which perception alternates between different images presented to each eye.
		Binocular rivalry occurs between any stimuli that differ sufficiently, including simple stimuli like lines of different orientation and complex stimuli like different alphabetic letters or different pictures such as of a face and of a house.
		From the key-press records (Breese's were made on a kymograph drum), Breese was able to quantify rivalry in three ways: the number of periods of exclusive visibility of each stimulus (the rate of rivalry), the total duration of exclusive visibility of each stimulus, and the average duration of each period of rivalry.
	www.arikah.net /encyclopedia/Binocular_rivalry (1744 words)

	Encyclopedia: Binocular rivalry (Site not responding. Last check: 2007-11-06)
		Binocular rivalry is generally thought to be one example of bistable perception, a larger family of perceptual phenomena where conscious perception alternates between two alternate interpretations of the visual scene.
		Such binocular vision is usually accompanied by singleness of vision or binocular fusion, in which a single image is seen despite each eye's having its own image of any object.
		Binocular summation means that the detection threshold for a stimulus is lower with two eyes than with one.
	www.nationmaster.com /encyclopedia/Binocular-rivalry (607 words)

	Transparency and Rivalry
		The perceptual switching in binocular rivalry shares many features with other multistable percepts, and might be the outcome of a general neuronal process.
		Transparency and binocular Rivalry, and even their combination, can be handled by a network which is basically an extension of coherence-based stereo to multiple orientation channels.
		binocular rivalry is a random process: the time an input channels stays dominant follows approximately a gamma-distribution.
	axon.physik.uni-bremen.de /research/stereo/rivalry (1338 words)

	The Neuroscience of Consciousness
		Binocular rivalry is of interest in consciousness research because the parts of the brain that contain the dominant image should also be those parts that are contributing to conscious experience.
		Binocular rivalry involves at least two components; the first switches from one image to a merged image and then to the other image and the second permits the view to be part of conscious experience.
		In the case of binocular rivalry there appears to be a consensus that either cortical area V1 or the Lateral Geniculate nuclei are able to switch cortical input from one eye to the other.
	www.users.globalnet.co.uk /~lka/conz3a2.htm (3516 words)

	A Hybrid Neural network Model of Binocular Rivalry
		The phenomenon of binocular rivalry was documented as early as 1760 by Dutour (O'Shea, 1999).
		Rivalry was seen as a result of "reciprocal inhibition between feature-detecting neurons in early vision" (Blake, 2001, p.
		There was no threshold level, over which rivalry could be said to occur, and there was no final judge to decide whether or not rivalry had really occurred; all that could be stated was that the RS was significantly higher for some groups of pictures than for others.
	www.stenmorten.com /CogSci/brnn.htm (4202 words)

	What you see is not always what you get with binocular rivalry
		While binocular rivalry is rarely encountered in the normal visual environment, it provides a useful means of probing the workings of the visual parts of our brain: although the visual stimulus is artificial, the brain is functioning in its usual way.'
		For two images to generate binocular rivalry they have to provide conflicting evidence about what is present in any given part of the visual world.
		To ensure that rivalry was not generated until a late stage of visual processing, the experimenters used images of walking human figures visible only via lights placed on their joints.
	www.usyd.edu.au /news/84.html?newsstoryid=110 (597 words)

	Joint International Conference on Cog Sci
		The phenomenon that two dissimilar images are perceived alternately is known as binocular rivalry, whereas the one that two images with disparity are fused and 3-D structures are perceived is known as stereopsis.
		Recently, binocular rivalry is thought to be a promising phenomenon for understanding brain mechanisms of conscious awareness.
		Despite of extensive studies on binocular rivalry, controversies still remain as to precisely what region of the brain is involved in it.
	hps.arts.unsw.edu.au /cogsci_conf/abstracts_authors/kobayashi_tetsuo.html (489 words)

	Joint International Conference on Cog Sci
		Binocular rivalry has alternatively been argued to involve rivalry between eye of origin information and/or between stimulus representation.
		When eye rivalry was abolished by rapidly swapping the stimuli between eyes, the primary determinant of awareness was stimulus colour (stable in 86% of trials).
		This pattern of results suggests that awareness in binocular rivalry is mediated by mechanisms only weakly affected by non-rivalrous vision.
	hps.arts.unsw.edu.au /cogsci_conf/abstracts_authors/Pearson.html (359 words)

	When the brain changes its mind: Interocular grouping during binocular rivalry -- Kovács et al. 93 (26): 15508 ...
		Binocular rivalry is produced by providing dissimilar views for the two eyes that cannot be fused into a single percept and
		Binocular rivalry is a very unique phenomenon regarding the search for the neural substrates of perceptual awareness (19).
		geniculate nucleus and the cortex, to the binocular layers of
	www.pnas.org /cgi/content/full/93/26/15508 (2732 words)

	Karl Frederick Arrington ( kfa ) Binocular Rivalry Abstract (Site not responding. Last check: 2007-11-06)
		Binocular rivalry model using multiple habituating nonlinear reciprocal connections.
		Binocular rivalry is the alternation of perception that occurs when stimuli to the two eyes are sufficiently different that they cannot be combined into a single visual percept.
		Binocular rivalry was mathematically modeled using a reciprocal inhibition oscillator network that is based on the gated pacemaker model of Carpenter & Grossberg (1983).
	arringtonresearch.com /kfa/abstract/sfn93.html (146 words)

	Connotea: Bookmarks matching tag "binocular rivalry"
		Such binocular rivalry is associated with relative suppression of local, eye-based representations1, 2, 3, 4 that can also be modulated by high-level influences such as perceptual grouping3, 5, 6.
		Binocular rivalry is the alternating perception that occurs when incompatible stimuli are presented to the two eyes: one monocular stimulus dominates vision and then the other stimulus dominates, with a perceptual switch occurring every few seconds.
		There is a need for a binocular rivalry model that accounts for both well-established results on the timing of dominance intervals, and for more recent evidence on the distributed neural processing of rivalry.
	www.connotea.org /tag/binocular%20rivalry (1014 words)

	Journal of Vision - V1 activity is reduced during binocular rivalry, by Lee & Blake
		During binocular rivalry, one of two incompatible monocular stimuli is erased from perceptual awareness for seconds at a time.
		To examine whether this “rivalry suppression” occurs in V1, we measured functional magnetic resonance imaging activity during binocular rivalry and compared it with those in the two reference conditions: one representing complete suppression and the other representing no suppression.
		We found that the amplitude of V1 activity during rivalry fell midway between those in the two reference conditions; the amount of V1 activity associated with the nondominant pattern was reduced by 48% to 77% during rivalry.
	journalofvision.org /2/9/4 (224 words)

	RED / BLUE 3D DEMO
		Binocular vision results when the brain combines these disparate images to determine true stereoscopic depth.
		This simulates binocular disparity, a perceptual cue that uses the separation between the two eyes to judge the distance of objects.
		Binocular rivalry dramatically demonstrates what would happen if the image in the left eye was different from the image in the right eye.
	wiley.com /college/psyc/huffman249327/resources/weblinks/3d_demo.html (400 words)

	Journal of Vision - Binocular rivalry suppression does impede buildup of the motion aftereffect., by Sobel, Blake, ...
		The checkerboard was sufficiently dissimilar to trigger binocular rivalry, and sufficiently strong to suppress the drifting grating from visual awareness for most of the adaptation period.
		However, when the contrast of the adapting grating was lower, rivalry suppression did reduce the magnitude of the MAE and completely abolished it when adaptation contrast was very low.
		Results from adaptation regimes that mimicked rivalry alternations imply that suppression effectively reduces grating contrast by 0.5 log-units, a reduction too small to affect adaptation at high contrasts where the MAE is presumably near saturation.
	www.journalofvision.com /4/8/243 (355 words)

	SFN02
		[If you want to learn about binocular rivalry in relation to bipolar disorder from someone with more experience, go to Jack Pettigrew's webpage.] My ignorance is no measure of other's education, but I really have no reason to expect that you are any more familiar with binocular rivalry than I had been.
		Binocular rivalry is indeed a curious phenomenon, but the world is full of curious phenomena.
		Either the subject had amblyopia and his brain was ignoring input from one eye, or the subject's two eyes did not focus together at the same distance (sometimes because of Lasek surgery for presbyopia) and her brain was ignoring input from the out-of-focus eye.
	www.science.siu.edu /zoology/king/binriv/gville02.htm (2056 words)

	Neuronal activity in human primary visual cortex correlates with perception during binocular rivalry - Nature ...
		The response fluctuations during rivalry, when expressed as a percentage of the fluctuations during physical alternation, were roughly equal in V1 and extrastriate visual areas (Tables 2 and 3).
		The amplitude of the fluctuations in V1 activity during rivalry was 45−83% of the amplitude evoked during physical stimulus alternation.
		In V1, the average firing rate modulation during rivalry was thus found to be 33% as large as that evoked by physically alternating between the two stimulus patterns.
	www.nature.com /neuro/journal/v3/n11/full/nn1100_1153.html (5341 words)

	JSMF - 1999 McDonnell - Pew Program in Cognitive Neuroscience
		Binocular rivalry is a bistable perceptual phenomenon that dissociates conscious perception from the retinal stimulus, and thus provides a powerful method of studying the neural underpinnings of visual awareness.
		The neural basis of this phenomenon of binocular rivalry remains controversial.
		Whereas psychophysical studies have suggested that rivalry reflects low-level competition between monocular V1 neurons (e.g., Blake, 1989), single-unit recordings in alert monkeys suggest that competitive interactions in rivalry are far from resolved in higher-level areas such as V4 and MT (Leopold and Logothetis, 1996; Logothetis and Schall, 1989).
	www.jsmf.org /grants/historical/mcpew/1999/tong.htm (519 words)

	Journal of Vision - Independent binocular rivalry processes for form and motion, by Alais & Parker
		Aim: To test whether binocular rivalry suppression entails low-level, non-selective eye suppression, or higher-level feature-selective suppression.
		Rivalry coherence was also measured (proportion of 5 min period in which one or other image was exclusively visible).
		Results: For rivalry between two faces, suppression was deep for face probes (.27) while global motion probes were not suppressed at all (~1).
	www.journalofvision.org /5/8/1047 (332 words)

	Experiment provides new clues to the location of visual consciousness
		In normal binocular vision, sensory information from the two eyes is fused into a single, three-dimensional visual impression.
		Stereopsis, the ability to fuse two, two-dimensional images into a three-dimensional image, is the flip-side of binocular rivalry.
		Some vision researchers argue that binocular rivalry must be handled at a low level in the brain’s visual processing hierarchy, while others maintain that it must be handled at higher levels.
	www.eurekalert.org /pub_releases/2001-08/vu-epn082701.php (916 words)

	[No title]
		The outline of the experimental method is as follow; when the different wavelength and figure stimuli are given to each eyes, binocular rivalry or binocular fusion or binocular color mixture has percepted.
		This definition including also the condition of the perfect hiding on the apparent phase of binocular rivalry imperfect hiding on the uncertain phase of binocular rivalry or fusion (refer to SPIE Vol.3964).
		In this time, I report the results of some observation on the dark peripheral visual field, gray (some luminous as the stimulus) and fl, in the same manner to discuss the luminous effect of the peripheral visual field on the basis of comparison with the results of the blight peripheral visual field.
	www.iscc.org /aic2001/abstracts/poster/Awano.doc (414 words)

	David Li
		David is studying several aspects of binocular rivalry.
		Binocular rivalry is a phenomenon that occurs when the two eyes are presented with incompatible visual stimuli.
		Measuring the visual loss due to binocular suppression helps to define what aspects of the stimulus are being suppressed, which parts of the visual pathway might be responsible for the suppression, and where the rivalry is initiated.
	www3.fhs.usyd.edu.au /bio/davidli.html (450 words)

	The relationship between binocular rivalry and strabismic suppression -- Smith et al. 26 (1): 80 -- Investigative ...
		The relationship between binocular rivalry and strabismic suppression -- Smith et al.
		that binocular rivalry differentially attenuates the sensitivity of the
		rivalry suppression are mediated by different neural mechanisms.
	www.iovs.org /cgi/content/abstract/26/1/80 (239 words)

	Foreground Occlusions and Binocular Rivalry (Site not responding. Last check: 2007-11-06)
		It is certainly true that contrast gradients play a role in binocular rivalry, and hence that reducing contrast gradients at the edge of the screen should reduce the luning effect.
		However, a different approach to the luning problem is suggested by thinking of binocular rivalry as a high-level phenomenon, associated with competing perceptual interpretations, rather than as a low-level phenomenon associated with competing monocular stimuli.
		Thus rivalry may involve competition between alternative perceptual interpretations at a higher level of analysis.'' They describe an experiment in which alternating images compete independently of the eye from which they are detected.
	www.hitl.washington.edu /publications/r-98-11/node133.html (1394 words)

	Perception abstract: How context influences predominance during binocular rivalry
		Variations in the predominance of an object engaged in binocular rivalry may arise from variations in the durations of dominance phases, suppression phases, or both.
		In the present experiments, the global context outside of the region of rivalry was changed during rivalry, to learn whether contextual information alters the ability to detect changes in a suppressed target itself.
		To reconcile diverse findings concerning rivalry, it may be important to distinguish between processes responsible for selection of one eye's input for dominance from processes responsible for the implementation and maintenance of suppression.
	www.perceptionweb.com /perabs/p31/p3279.html (195 words)

	Interhemispheric Switching
		A midbrain neural basis for the perceptual oscillations of binocular rivalry is suggested on the basis of fMRI studies of rivalry and inferences from the properties of rivalry that cannot be explained from the known properties of primary visual cortical (V1) neurons.
		We show that two different hemispheric activating techniques produce changes in perceptual rivalry that are consistent with the hypothesis that the perceptual switches are mediated by attentional switches between the hemispheres.
		Binocular rivalry has traditionally been assumed to be mediated by reciprocal inhibition of neurones in separate monocular channels in primary visual cortex.
	www.uq.edu.au /nuq/jack/InterhemisphericSwitching.html (1597 words)

Try your search on: Qwika (all wikis)