Parameter dependence in visual pattern-component rivalry at onset and during prolonged viewing

Wegner, Thomas G. G.; Grenzebach, Jan; Bendixen, Alexandra; Einhäuser, Wolfgang

doi:10.1016/j.visres.2020.12.006

Cited by 2 publications

(2 citation statements)

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“…The main feature that allows this robust decoding is the design of the specific pattern-component rivalry stimulus ( Wilbertz et al, 2018 ), which is constructed in a way that the segregated (component) percept comes with a clear separation into foreground and background grating, and thus with a unanimous motion direction. Relative to other versions of pattern-component rivalry ( Einhäuser et al, 2020 ; Wegner et al, 2021 ), where the segregated percept consists of two equally strong components and thus two simultaneously perceived motion directions, this gives a much better OKN distinction between integrated (plaid/pattern) and segregated (component) percepts. Together with the SVM-based classifier ( Wilbertz et al, 2018 ), this led to a robustness of moment-by-moment readout that allowed us to go substantially beyond our own previous investigations: In Einhäuser et al (2020) , we had likewise taken direct measures of auditory perception and OKN-based indirect measures of visual perception.…”

Section: Discussionmentioning

confidence: 95%

“…To avoid extreme asymmetries and thus increase statistical power for finding moment-by-moment coupling if there is any, we pre-adjusted the stimulus parameters to draw near a 50/50% distribution of integrated and segregated percepts, separately for each individual and in each modality. The adjustments were based on changing parameters known to affect the relative proportion of integrated and segregated percepts: the frequency difference between the A and B tones ( Denham, Gyimesi, Stefanics, & Winkler, 2013 ; van Noorden, 1975 ), and the enclosed angle (“opening angle”) between the gratings ( Carter, Snyder, Fung, & Rubin, 2014 ; Hedges, Stocker, & Simoncelli, 2011 ; Hupé & Pressnitzer, 2012 ; Wegner, Grenzebach, Bendixen, & Einhäuser, 2021 ). Any remaining asymmetries were accounted for in the analysis.…”

Section: Introductionmentioning

confidence: 99%

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Bimodal moment-by-moment coupling in perceptual multistability

Grenzebach,

Wegner,

Einhäuser

et al. 2024

Journal of Vision

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Multistable perception occurs in all sensory modalities, and there is ongoing theoretical debate about whether there are overarching mechanisms driving multistability across modalities. Here we study whether multistable percepts are coupled across vision and audition on a moment-by-moment basis. To assess perception simultaneously for both modalities without provoking a dual-task situation, we query auditory perception by direct report, while measuring visual perception indirectly via eye movements. A support-vector-machine (SVM)–based classifier allows us to decode visual perception from the eye-tracking data on a moment-by-moment basis. For each timepoint, we compare visual percept (SVM output) and auditory percept (report) and quantify the co-occurrence of integrated (one-object) or segregated (two-objects) interpretations in the two modalities. Our results show an above-chance coupling of auditory and visual perceptual interpretations. By titrating stimulus parameters toward an approximately symmetric distribution of integrated and segregated percepts for each modality and individual, we minimize the amount of coupling expected by chance. Because of the nature of our task, we can rule out that the coupling stems from postperceptual levels (i.e., decision or response interference). Our results thus indicate moment-by-moment perceptual coupling in the resolution of visual and auditory multistability, lending support to theories that postulate joint mechanisms for multistable perception across the senses.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Bimodal moment-by-moment coupling in perceptual multistability

Grenzebach,

Wegner,

Einhäuser

et al. 2024

Journal of Vision

Self Cite

View full text Add to dashboard Cite

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Low-high-low or high-low-high? Pattern effects on sequential auditory scene analysis

Thomassen

Hartung

Einhäuser

et al. 2022

The Journal of the Acoustical Society of America

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Sequential auditory scene analysis (ASA) is often studied using sequences of two alternating tones, such as ABAB or ABA_, with “_” denoting a silent gap, and “A” and “B” sine tones differing in frequency (nominally low and high). Many studies implicitly assume that the specific arrangement (ABAB vs ABA_, as well as low-high-low vs high-low-high within ABA_) plays a negligible role, such that decisions about the tone pattern can be governed by other considerations. To explicitly test this assumption, a systematic comparison of different tone patterns for two-tone sequences was performed in three different experiments. Participants were asked to report whether they perceived the sequences as originating from a single sound source ( integrated) or from two interleaved sources ( segregated). Results indicate that core findings of sequential ASA, such as an effect of frequency separation on the proportion of integrated and segregated percepts, are similar across the different patterns during prolonged listening. However, at sequence onset, the integrated percept was more likely to be reported by the participants in ABA_low-high-low than in ABA_high-low-high sequences. This asymmetry is important for models of sequential ASA, since the formation of percepts at onset is an integral part of understanding how auditory interpretations build up.

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Parameter dependence in visual pattern-component rivalry at onset and during prolonged viewing

Cited by 2 publications

References 42 publications

Bimodal moment-by-moment coupling in perceptual multistability

Bimodal moment-by-moment coupling in perceptual multistability

Low-high-low or high-low-high? Pattern effects on sequential auditory scene analysis

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