Baker, Daniel Hart orcid.org/0000-0002-0161-443X, Hansford, Kirralise, Segala, Federico et al. (5 more authors) (2024) Binocular integration of chromatic and luminance signals. Journal of Vision. 7. ISSN 1534-7362
Abstract
Much progress has been made in understanding how the brain combines signals from the two eyes. However, most of this work has involved achromatic (black and white) stimuli, and it is not clear if the same processes apply in color-sensitive pathways. In our first experiment, we measured contrast discrimination (“dipper”) functions for four key ocular configurations (monocular, binocular, half-binocular, and dichoptic), for achromatic, isoluminant L-M and isoluminant S-(L+M) sine-wave grating stimuli (L: long-, M: medium-, S: short-wavelength). We find a similar pattern of results across stimuli, implying equivalently strong interocular suppression within each pathway. Our second experiment measured dichoptic masking within and between pathways using the method of constant stimuli. Masking was strongest within-pathway and weakest between S-(L+M) and achromatic mechanisms. Finally, we repeated the dipper experiment using temporal luminance modulations, which produced slightly weaker interocular suppression than for spatially modulated stimuli. We interpret our results in the context of a contemporary two-stage model of binocular contrast gain control, implemented here using a hierarchical Bayesian framework. Posterior distributions of the weight of interocular suppression overlapped with a value of 1 for all dipper data sets, and the model captured well the pattern of thresholds from all three experiments.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Authors |
Keywords: | Humans,Vision, Binocular/physiology,Contrast Sensitivity/physiology,Photic Stimulation/methods,Color Perception/physiology,Perceptual Masking/physiology,Adult,Bayes Theorem,Sensory Thresholds/physiology,Male |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Psychology (York) |
Depositing User: | Pure (York) |
Date Deposited: | 08 Nov 2024 09:50 |
Last Modified: | 06 Feb 2025 00:13 |
Published Version: | https://doi.org/10.1167/jov.24.12.7 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1167/jov.24.12.7 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:219367 |
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Filename: i1534-7362-24-12-7_1730801777.86085.pdf
Description: Binocular integration of chromatic and luminance signals
Licence: CC-BY 2.5