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Marek Binder

2 papers in the library · publishing 2017-2019

Papers

The role of levels of processing in disentangling the ERP signatures of conscious visual processing.

Consciousness and Cognition August 1, 2019 Monika Derda, Marcin Koculak, Bert Windey et al.

Electrophysiological signatures of visual awareness can be distinguished from other task-related processes by manipulating the level of processing of visual stimuli. In an EEG experiment, 36 subjects performed either color (low-level) or magnitude (high-level) evaluations of masked digits and rated their subjective visibility. Mean amplitude in the VAN component time window (140-240 ms) correlated with visibility ratings in both conditions. Mean amplitude in the LP time window (380-480 ms) correlated with visibility ratings only in the high-level condition. These results support a temporal unfolding of ERP markers of conscious processing: an early component reflects initial perceptual experience, while a late component correlates with conscious experience of non-perceptual information.

DOI: 10.1016/j.concog.2019.102767 (opens in new tab) Full text (opens in new tab) Awareness Consciousness Contrastive analysis EEG +4

The levels of perceptual processing and the neural correlates of increasing subjective visibility.

Consciousness and Cognition October 1, 2017 Marek Binder, Krzysztof Gociewicz, Bert Windey et al.

Transitions from unconscious to conscious perception may be more gradual for low-level visual features and more dichotomous for high-level features. In an fMRI study using backward masking, participants reported a target digit's magnitude (high-level) or its color (low-level) and rated visibility. Intermediate visibility was reported more often in the low-level task, supporting the levels-of-processing hypothesis. Visible targets activated insulo-fronto-parietal regions in both tasks, while visual areas showed higher activity in the low-level task across all visibility levels. The findings suggest that attentional modulation of feature-representing brain regions mediates how processing level shapes conscious perception.

DOI: 10.1016/j.concog.2017.07.010 (opens in new tab) Full text (opens in new tab) Awareness Consciousness Dichotomous Graded +3