6/20/2023 0 Comments Binocular rivalry![]() ![]() The present work centers on one recurring question in the literature, namely, whether or not binocular rivalry shares mechanisms with other forms of bistable perception that have a similar phenomenology but that involve no inter-ocular conflict (e.g., Necker cube perception). Although this phenomenon, termed “binocular rivalry,” has been studied extensively (Wheatstone, 1838 Blake & Logothetis, 2002), many questions remain about the neural processes that underlie it. When viewers are shown two incompatible images, one to each eye, their perception oscillates over time, with each monocular image being seen in turn ( Figure 1A). These latter mechanisms would operate at a binocular level and be central to both binocular rivalry and other forms of bistability. We propose that the first, feature-specific factor corresponds to feature-tuned mechanisms involved in the treatment of interocular conflict, whereas the second, general factor corresponds to mechanisms involved in representing surfaces. This indicates a second, more general, factor underlying individual differences in binocular rivalry perception: one that is shared across binocular rivalry and moving plaid rivalry. ![]() Moreover, and surprisingly, correlations between binocular rivalry and moving plaid rivalry were of similar magnitude. Correlations in dominance durations between binocular rivalry variants that differed in feature content were again modest. Our second experiment again included several binocular rivalry variants, but also a different form of bistability: moving plaid rivalry. Thus, individual differences in binocular-rivalry perception partly reflect a feature-specific factor that is not shared among all variants of binocular rivalry. Correlations were substantially weaker, however, when comparing stimuli comprised of different features. Perceptual dominance durations were highly correlated when compared between stimuli that differed in location only. In a first experiment, observers reported perception during four binocular rivalry tasks that differed in the features and retinal locations of the stimuli used. Here we examine this question using an individual-differences approach. This raises the question of whether, and to what extent, the neural bases of binocular rivalry and other bistable phenomena overlap. Although binocular rivalry is different from other perceptually bistable phenomena in requiring interocular conflict, it also shares numerous features with those phenomena.
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