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. 2012 May 1;7(5):e36220. doi: 10.1371/journal.pone.0036220

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Spiegel et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Panels A and B show individual participant data and C shows the mean group data. The suppression factor shown on the y-axis of each panel was calculated by dividing the detection threshold for the target alone by the threshold for the target + mask. Values above 1 (dashed line) indicate mask-induced suppression. Arrows in A and B indicate the mask orientations used for the tDCS portion of the study. Error bars represent ±1 SEM.