Binocular Rivalry in Half-Occluded Regions of Coloured Stereograms Where the Background is a Drifting Grating

M Suzuki

doi:10.1068/v970105

Binocular Rivalry in Half-Occluded Regions of Coloured Stereograms Where the Background is a Drifting Grating

Perception ◽

10.1068/v970105 ◽

1997 ◽

Vol 26 (1_suppl) ◽

pp. 2-2

Author(s):

M Suzuki

Keyword(s):

Binocular Rivalry ◽

Vertical Grating ◽

Uncrossed Disparity ◽

Disappearance Time ◽

S Period ◽

Cumulative Time

Binocular rivalry in half-occluded (HO) regions was studied with coloured stereograms where the background was a drifting grating. The coloured stereograms consisted of a central square-shaped region, a background, and HO regions. The central square-shaped region was coloured green, and was presented in either crossed or uncrossed disparity. The background was a stationary or drifting vertical grating consisting of white and grey bars. The HO regions were coloured blue, and the luminance was fixed or was changed consistently with the drifting grating in the background. Subjects judged the disappearance of the HO regions, and the cumulative time of disappearance was measured during a 30 s period. When the luminance of the HO regions was fixed against the background of a drifting grating, the disappearance time was the same as for the static grating background. However, when the luminance of the HO regions was modulated consistently with the drifting background grating, the cumulative disappearance time was significantly less than when the background was a static grating. These results suggest that the HO regions escape binocular rivalry when they correlate with the background.

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Binocular Rivalry in Half-Occluded Regions of Coloured Random-Dot Stereograms

Perception ◽

10.1068/v96p0203 ◽

1996 ◽

Vol 25 (1_suppl) ◽

pp. 154-154

Author(s):

M Suzuki

Keyword(s):

Binocular Rivalry ◽

Ecological Validity ◽

The Other ◽

Other Hand ◽

Uncrossed Disparity ◽

Random Dot Stereograms ◽

Normal Perception

In normal perception, binocular rivalry does not arise in half-occluded regions. However, when coloured random-dot stereograms (RDSs) were observed, binocular rivalry arose in half-occluded regions. In this study, binocular rivalry in half-occluded regions was studied with coloured RDSs. Coloured RDSs consisted of a central square-shaped region, a background, half-occluded regions, and a probe. The central square-shaped region was coloured white, and was presented in either crossed or uncrossed disparity. The background was coloured yellow. The half-occluded regions were coloured either white, yellow, or blue. The probe was coloured red, and was presented in either of the half-occluded regions. Subjects judged the disappearance of the probe and stereopsis. When the half-occluded regions were coloured the same as the front plane, the probe and stereopsis both disappeared. On the other hand, when the half-occluded regions were coloured the same as the back plane or differently from both planes only the probe disappeared while stereopsis did not disappear. Also, disappearance of the probe decreased more when the half-occluded regions were coloured the same as the back plane, than when the half-occluded regions were coloured differently from both planes. These results suggest that half-occluded regions escape binocular rivalry for several reasons, including ecological validity in 3-D representation, and that half-occluded regions are suppressed interocularly when a static stereogram is observed statically.

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Aftereffects in Binocular Rivalry

Perception ◽

10.1068/p150419 ◽

1986 ◽

Vol 15 (4) ◽

pp. 419-434 ◽

Cited By ~ 13

Author(s):

Nicholas J Wade ◽

Charles M M De Weert

Keyword(s):

Binocular Rivalry ◽

Vertical Grating ◽

Circular Pattern ◽

Binocular Interaction ◽

Fourth Experiment ◽

The Right ◽

Horizontal Grating

Five experiments are reported in which the aftereffect paradigm was applied to binocular rivalry. In the first three experiments rivalry was between a vertical grating presented to the left eye and a horizontal grating presented to the right eye. In the fourth experiment the rivalry stimuli consisted of a rotating sectored disc presented to the left eye and a static concentric circular pattern presented to the right. In experiment 5 rivalry was between static radiating and circular patterns. The predominance durations were systematically influenced by direct (same eye) and indirect (interocular) adaptation in a manner similar to that seen for spatial aftereffects. Binocular adaptation produced an aftereffect that was significantly smaller than the direct aftereffect, but not significantly different from the indirect one. A model is developed to account for the results; it involves two levels of binocular interaction in addition to monocular channels. It is suggested that the site of spatial aftereffects is the same as that for binocular rivalry, rather than sequentially prior.

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No impact of affective person knowledge on visual awareness: Evidence from binocular rivalry and continuous flash suppression.

Emotion ◽

10.1037/emo0000305 ◽

2017 ◽

Vol 17 (8) ◽

pp. 1199-1207 ◽

Cited By ~ 6

Author(s):

Timo Stein ◽

Caitlyn Grubb ◽

Maria Bertrand ◽

Seh Min Suh ◽

Sara C. Verosky

Keyword(s):

Binocular Rivalry ◽

Visual Awareness ◽

Continuous Flash Suppression

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Major Surgery in a Subject with Factor V Deficiency

Thrombosis and Haemostasis ◽

10.1055/s-0038-1654318 ◽

1971 ◽

Vol 25 (03) ◽

pp. 438-446 ◽

Cited By ~ 10

Author(s):

E. J Melliger ◽

F Duckert

Keyword(s):

Intercellular Space ◽

Correct Diagnosis ◽

Postoperative Bleeding ◽

Major Surgery ◽

Factor V ◽

Factor V Deficiency ◽

Disappearance Time ◽

Fresh Plasma ◽

One Year

SummaryA further case of parahaemophilia is reported. One year after the correct diagnosis had been made the patient had to undergo cholecystectomy which was performed under prophylactic substitutive treatment with fresh plasma at a factor V level of 31 %. A minimal factor V level of 11 to 12% was maintained throughout the first week after operation. There was no abnormal postoperative bleeding. The half disappearance time of factor V was found to be about 12 h. Infusion of equivalent amounts of fresh plasma supplied a higher yield of factor V in the patient’s plasma before operation than postoperatively what may be explained by an increased diffusion of factor V into the intercellular space resulting from a postoperatively increased capillar permeability. The results are compared with those of other authors.

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