Binocular rivalry from luminance and contrast

Qiu, Shiming; Caldwell, Clare; You, Jia; Mendola, Janine D.

doi:10.1016/j.visres.2020.06.006

Cited by 13 publications

(12 citation statements)

References 69 publications

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“…3, dotted lines) showed a net predominance of black disk percepts with respect to the white ones (binocular rivalry: t (37) = 8.70, p , 0.001, logBF = 7.77; interocular grouping rivalry: t (37) = 12.81, p , 0.001, logBF = 12.27). In line with the modified Levelt's propositions and results by Qiu et al (2020), this can be explained by the higher Michelson contrast of the black disk stimulus (recall that the background was set to mid-gray, resulting in identical Weber contrast but different Michelson contrast for the two disk stimuli). However, dominance of the black percept cannot logically explain the pupil modulations; moreover, while both black dominance and pupil size modulations varied across participants, the two were reliably uncorrelated (binocular rivalry: r = -0.09, p = 0.58, logBF = -0.83, interocular grouping rivalry: r = -0.20, p = 0.22, logBF = -0.58).…”

Section: Resultssupporting

confidence: 60%

Attention Cueing in Rivalry: Insights from Pupillometry

Acquafredda

Binda²,

Lunghi³

2022

eNeuro

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We used pupillometry to evaluate the effects of attention cueing on perceptual bi-stability, as reported by adult human observers. Perceptual alternations and pupil diameter were measured during two forms of rivalry, generated by presenting a white and a black disk to the two eyes (binocular rivalry) or splitting the disks between eyes (interocular grouping rivalry). In line with previous studies, we found that subtle pupil size modulations (;0.05 mm) tracked alternations between exclusive dominance phases of the black or white disk. These pupil responses were larger for perceptually stronger stimuli: presented to the dominant eye or with physically higher luminance contrast. However, cueing of endogenous attention to one of the rivaling percepts did not affect pupil modulations during exclusive dominance phases. This was observed despite the reliable effects of endogenous attention on perceptual dominance, which shifted in favor of the cued percept by ;10%. The results were comparable for binocular and interocular grouping rivalry. Cueing only had a marginal modulatory effect on pupil size during mixed percepts in binocular rivalry. This may suggest that, rather than acting by modulating perceptual strength, endogenous attention primarily acts during periods of unresolved competition, which is compatible with attention being automatically directed to the rivaling stimuli during periods of exclusive dominance and thereby sustaining perceptual alternations.

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Section: Resultssupporting

confidence: 60%

Attention Cueing in Rivalry: Insights from Pupillometry

Acquafredda

Binda²,

Lunghi³

2022

eNeuro

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“…The analysis of behavioural reports in the no cueing condition (dashed lines in Figure 3) showed a net predominance of black disk percepts with respect to the white ones (main effect of dominant percept in Table 1), marginally more pronounced for interocular grouping rivalry. In line with the modified Levelt’s propositions and results by Qiu et al, (2020), this can be explained by the higher Michaelson contrast of the black disk stimulus (recall that stimulus luminance was set to the limits of the screen to evoke the largest possible pupil modulations).…”

Section: Resultsmentioning

confidence: 52%

Attention cueing in rivalry: insights from pupillometry

Acquafredda

Binda

Lunghi

2021

Preprint

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We used pupillometry to evaluate the effects of attention cueing on perceptual bi-stability, as reported by adult human observers. Perceptual alternations and pupil diameter were measured during two forms of rivalry, generated by presenting a white and a black disk to the two eyes (binocular rivalry) or splitting the disks between eyes (interocular grouping rivalry). In line with previous studies, we found that subtle pupil size oscillations (about 0.05 mm) tracked alternations between exclusive dominance phases of the black or white disk. These oscillations were larger for perceptually stronger stimuli: presented to the dominant eye or with physically higher luminance contrast. However, cueing of endogenous attention to one of the rivaling percepts did not affect pupil oscillations during exclusive dominance phases. This was in spite of the reliable effects of endogenous attention on perceptual dominance, which shifted in favor of the cued percept by about 10%. The results were comparable for binocular and interocular grouping rivalry. Cueing only had a marginal modulatory effect on pupil size during mixed percepts in binocular rivalry. This may suggest that, rather than acting by modulating perceptual strength, endogenous attention primarily acts during periods of unresolved competition, which is compatible with attention being automatically directed to the rivaling stimuli during periods of exclusive dominance and thereby sustaining perceptual alternations.

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“…When sufficiently different images are shown to each eye and cannot be fused, perception repeatedly alternates between the two stimuli presented, despite unchanging sustained retinal input. The cycles from dominance to suppression for each stimulus are attributed to competitive mutual inhibition between separate groups of neurons that represent the perceptual alternatives (e.g., Blake, 1989; Qiu et al, 2020). The neural correlates of BR and related paradigms may shed light on general mechanisms of visual selection and conscious awareness.…”

Section: Introductionmentioning

confidence: 99%

Distinct dorsal and ventral streams for binocular rivalry dominance and suppression revealed by magnetoencephalography

Bock

Fesi

Castenheira

et al. 2023

Eur J of Neuroscience

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Binocular rivalry is an example of bistable visual perception extensively examined in neuroimaging. Magnetoencephalography can track brain responses to phasic visual stimulations of predetermined frequency and phase to advance our understanding of perceptual dominance and suppression in binocular rivalry. We used left and right eye stimuli that flickered at two tagging frequencies to track their respective oscillatory cortical evoked responses. We computed time‐resolved measures of coherence to track brain responses phase locked with stimulus frequencies and with respect to the participants' indications of alternations of visual rivalry they experienced. We compared the brain maps obtained to those from a non‐rivalrous control replay condition that used physically changing stimuli to mimic rivalry. We found stronger coherence within a posterior cortical network of visual areas during rivalry dominance compared with rivalry suppression and replay control. This network extended beyond the primary visual cortex to several retinotopic visual areas. Moreover, network coherence with dominant percepts in primary visual cortex peaked at least 50 ms prior to the suppressed percept nadir, consistent with the escape theory of alternations. Individual alternation rates were correlated with the rate of change in dominant evoked peaks, but not for the slope of response to suppressed percepts. Effective connectivity measures revealed that dominant (respectively, suppressed) percepts were expressed in dorsal (respectively ventral) streams. We thus demonstrate that binocular rivalry dominance and suppression engage distinct mechanisms and brain networks. These findings advance neural models of rivalry and may relate to more general aspects of selection and suppression in natural vision.

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Binocular rivalry from luminance and contrast

Cited by 13 publications

References 69 publications

Attention Cueing in Rivalry: Insights from Pupillometry

Attention Cueing in Rivalry: Insights from Pupillometry

Attention cueing in rivalry: insights from pupillometry

Distinct dorsal and ventral streams for binocular rivalry dominance and suppression revealed by magnetoencephalography

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