What is salient in binocular rivalry
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What is salient in binocular rivalry. Fumihiko Taya* and Ken Mogi**, *Department of Physiology1, Osaka University Medical School **Sony Computer Science Laboratory. Abstract. We studied what stimulus features count as salient in binocular rivalry.

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What is salient in binocular rivalry

What is salient in binocular rivalry

Fumihiko Taya* and Ken Mogi**,

*Department of Physiology1, Osaka University Medical School

**Sony Computer Science Laboratory


Abstract
Abstract

  • We studied what stimulus features count as salient in binocular rivalry.

  • We found that motion is very salient and is a determining factor in the ocular dominance pattern in binocular rivalry.

  • We arrive at a model of binocular rivalry involving three layers.


Neural correlates with the ocular dominance pattern in binocular rivalry
Neural correlates with the ocular dominance pattern in binocular rivalry

  • Logothetis et al., 1989

  • Leopold et al., 1996

  • Kovacs et al., 1996

  • Sheinberg et al., 1997

  • Tononi et al., 1997

  • Fries et al., 1997

  • Lumer et al., 1998


Studies on binocular rivalry
Studies on binocular rivalry binocular rivalry

  • Studies on binocular rivalry has been conducted in an “all-or-none” paradigm, neglecting the spatial heterogeneity of the dominance pattern.

  • Here, we investigate the spatio-temporal structure of ocular dominance pattern in binocular rivalry.


Method 1 2
Method(1/2) binocular rivalry

Left eye

Right eye

Indicator

Fixation point

Phase difference

Visual awareness


Methods 2 2
Methods (2/2) binocular rivalry

  • Stimulus we used were:

    • Circles moving at a speed of 2.2 degrees/s

    • Stationary circles

  • We presented rivalrous images to each eyes (visual angle 11 degrees) with Crystal Eyes (StereoGraphics Corporation, Washington D.C., US).

  • Monitor: FlexScan E67T (Eizo) at 150 frames/s.


Visual awareness in binocular rivalry
Visual awareness in binocular rivalry binocular rivalry

  • Both of the moving circles were always present in visual awareness

    • Down to 0.3 degrees per second

    • Up to 20 degrees per second

  • Sometimes one or both of the stationary circles disappeared from visual awareness


Change of visual awareness moving circles
Change of visual awareness: binocular rivalrymoving circles

Time


Change of visual awareness stationary circles
Change of visual awareness: binocular rivalrystationary circles



Quantitative analysis
Quantitative Analysis conditions

  • Subjects were requested to report the perceived color at the position of an indicator which flashed in several position on the screen.




Results 0 degrees
Results: 0 degrees conditions


Results left eye
Results: left eye conditions


Results right eye
Results: right eye conditions


Summary of results
Summary of results conditions

  • The spatio-temporal dominance pattern was strongly influenced by the presence of moving circles.

  • The visual system behaves as dynamical adaptive system to represent the salient features at any given psychological moment.


Method
Method conditions

Left eye

Right eye

Indicator

Fixation point

Visual awareness



Results
Results conditions

  • The effective range of moving circle was about 2.2 degrees, namely the effect of salient features remained for about 1 second.

  • The salient feature only had effect on the subsequent visual awareness.

  • The prediction had no effect on determining the ocular dominance pattern.


Change of visual awareness interactive operation
Change of visual awareness: conditionsInteractive operation

Time



Three phenomenological layers

Attention conditions

Salient features

Visual qualia

Three phenomenological layers

Visual Awareness


Conclusion
Conclusion conditions


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