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The graded and discrete nature of conscious perception| old_uid | 12648 |
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| title | The graded and discrete nature of conscious perception |
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| start_date | 2017/03/20 |
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| schedule | 11h |
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| online | no |
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| details | Invited by the AVOC team |
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| summary | How do the stimuli that engage our sensory systems rise to the level of conscious perception? Some models view awareness as graded, with the quality of a conscious percept reflecting the amount of sensory information available, whereas other models posit that the resulting conscious percept is essentially discrete—either all or none. Using the attentional blink (AB) paradigm and mixture modeling analysis, we previously showed that target awareness arises at central stages of information processing in an all-or-none manner. Graph theory analysis of fMRI data reinforce these findings by showing that target awareness is associated with widespread changes in the brain’s functional connectivity, consistent with all-or-none, global workspace models of consciousness. However, recent findings from our lab suggest that, at least in the context of the AB, awareness can also be graded when the task loads early perceptual processing. Taken together, these findings suggest that target awareness can be graded or discrete depending on the stage of information processing taxed by task demands. |
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| responsibles | Rämä, Izard |
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