Weighing the evidence for a dorsal processing bias under continuous flash suppression |
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| Institution: | 1. Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité – Universitätsmedizin, Berlin, Germany;2. Department of Psychology, Humboldt-Universität zu Berlin, Germany;1. Institute of Psychology I, University of Leipzig, Leipzig, Germany;2. Department of Experimental – Clinical and Health Psychology, Ghent University, Ghent, Belgium;1. Fakultät für Psychologie, Universität Wien, Austria;2. Institut für Kognitionswissenschaften, Universität Osnabrück, Germany;3. Abteilung für Psychologie, Julius-Maximilians-Universität Würzburg, Germany;4. Klinik für Psychiatrie und Psychotherapie III, Universität Ulm, Germany;1. Department of Neuroscience, Bates College, United States;2. Department of Psychology, Bates College, United States;1. Department of Informatics, University of Sussex, Brighton BN1 9QJ, United Kingdom;2. Sackler Centre for Consciousness Science, University of Sussex, Brighton BN1 9QJ, United Kingdom;3. Universidade de Lisboa, Alameda da Universidade, Lisboa 1649-004, Portugal;1. Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité – Universitätsmedizin, 10117 Berlin, Germany;2. Department of Psychology, Humboldt-Universität zu Berlin, 10099 Berlin, Germany;1. Laboratory of Experimental Psychology, Department of Brain and Cognition, KU Leuven, Leuven, Belgium;2. Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands;3. School of Psychology and Clinical Language Sciences, University of Reading, Reading RG6 6AL, England;4. Amsterdam Brain and Cognition, University of Amsterdam, Amsterdam, The Netherlands;5. Department of Psychiatry and Psychotherapy, Charité Campus Mitte, Charité–Universitätsmedizin Berlin, Berlin, Germany;6. Philips Research, Department of Brain, Behavior and Cognition, High tech campus, Building 34, 5656AE, Eindhoven, The Netherlands;7. Department of General and Biological Psychology, Psychologische Hochschule Berlin, Berlin, Germany |
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| Abstract: | With the introduction of continuous flash suppression (CFS) as a method to render stimuli invisible and study unconscious visual processing, a novel hypothesis has gained popularity. It states that processes typically ascribed to the dorsal visual stream can escape CFS and remain functional, while ventral stream processes are suppressed when stimuli are invisible under CFS. This notion of a CFS-specific “dorsal processing bias” has been argued to be in line with core characteristics of the influential dual-stream hypothesis of visual processing which proposes a dissociation between dorsally mediated vision-for-action and ventrally mediated vision-for-perception. Here, we provide an overview of neuroimaging and behavioral studies that either examine this dorsal processing bias or base their conclusions on it. We show that both evidence for preserved ventral processing as well as lack of dorsal processing can be found in studies using CFS. To reconcile the diverging results, differences in the paradigms and their effects are worthy of future research. We conclude that given the current level of information a dorsal processing bias under CFS cannot be universally assumed. |
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| Keywords: | Continuous flash suppression Visual awareness Dual-stream model Dorsal stream |
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