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. 2011 Aug 23;2:198. doi: 10.3389/fpsyg.2011.00198

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Copyright © 2011 Kaunitz, Kamienkowski, Olivetti, Murphy, Avesani and Melcher.

This is an open-access article subject to a non-exclusive license between the authors and Frontiers Media SA, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and other Frontiers conditions are complied with.

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Rapid categorization is suppressed for unseen stimuli. (A) Raster plots for stimuli presented under invisibility conditions. These plots show the average of 12 subjects. (B) No ERP components were present in the data except for the activity associated to the Mondrians presentation. The difference between unseen animals versus unseen scrambled animals and unseen tools versus unseen scrambled tools are plotted for all channels (gray) and as particular examples for channel “OZ = cyan” and “FZ = magenta.” The activity of Mondrians is canceled by the subtraction between conditions. (C) Topographical maps show no particular information regarding unseen stimuli. CFS eliminated even the earliest EEG correlates of image categorization.