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Extending Levelt’s Propositions to perceptual multistability involving interocular grouping

Alain Jacot-Guillarmod, Yunjiao Wang, Claudia Pedroza, Haluk Ogmen, Zachary Kilpatrick, Krešimir Josić
doi: https://doi.org/10.1101/057232
Alain Jacot-Guillarmod
aDept. of Electrical&Computer Engineering, University of Houston, Houston, Texas, 77204 USA
hLausanne University, Hospital Lausanne, Switzerland
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Yunjiao Wang
bDept. of Mathematics, Texas Southern University, Houston, Texas, 77204 USA
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Claudia Pedroza
cCenter for Clinical Research and Evidence-Based Medicine, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, Texas, 77204 USA
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Haluk Ogmen
aDept. of Electrical&Computer Engineering, University of Houston, Houston, Texas, 77204 USA
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Zachary Kilpatrick
dDept. of Mathematics, University of Houston, Houston, Texas, 77204 USA
eDept. of Applied Mathematics, University of Colorado, Boulder, Colorado, 80309, USA
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Krešimir Josić
dDept. of Mathematics, University of Houston, Houston, Texas, 77204 USA
fDept. of Biology and Biochemistry, University of Houston, Houston, Texas, 77204, USA
gDept. of Bioscience, Rice Univer—sity, Houston, Texas, 77251 USA
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  • For correspondence: josic@math.uh.edu zpkil-pat@colorado.edu
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Abstract

Levelt’s Propositions have been a touchstone for experimental and modeling studies of perceptual multistability. We asked whether Levelt’s Propositions extend to perceptual multistability involving interocular grouping. To address this question we used split-grating stimuli withcomplementary halves of the same color. As in previous studies, subjects reported four percepts in alternation: the two stimuli presented to each eye (single-eye percepts), as well as two interocularly grouped, single color percepts (grouped percepts). Most subjects responded to increased color saturation by more frequently reporting a single color image, thus increasingthe predominance of grouped percepts (Levelt’s Proposition I). In these subjects increased predominance was due to a decrease in the average dominance duration of single-eye percepts, while that of grouped percepts remained largely unaffected. This is in accordance with generalized Levelt’s Proposition II which posits that the average dominance duration of the stronger (in this case single-eye) percept is primarily affectedbychanges in stimulus strength. In accordance with Proposition III, thealternation rate increased as the difference in the strength of the percepts decreased. To explain the mechanism behind these observations, we introduce a hierarchical model consisting of low-level neural populations, eachresponding to input at a visual hemifield, and higher-level populations representing the percepts. The model exhibits the changes in dominance durationobserved in the data, and conforms to all of Levelt’s Propositions.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.
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Posted June 05, 2016.
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Extending Levelt’s Propositions to perceptual multistability involving interocular grouping
Alain Jacot-Guillarmod, Yunjiao Wang, Claudia Pedroza, Haluk Ogmen, Zachary Kilpatrick, Krešimir Josić
bioRxiv 057232; doi: https://doi.org/10.1101/057232
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Extending Levelt’s Propositions to perceptual multistability involving interocular grouping
Alain Jacot-Guillarmod, Yunjiao Wang, Claudia Pedroza, Haluk Ogmen, Zachary Kilpatrick, Krešimir Josić
bioRxiv 057232; doi: https://doi.org/10.1101/057232

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