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. 2015 May 8;9:257. doi: 10.3389/fnhum.2015.00257

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Copyright © 2015 Vosskuhl, Huster and Herrmann.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Behavioral data from the WM and STM tasks. (A) Percentaged increase of correctly answered lists relative to pre-stimulation in the digit span task. Digit spans were assessed pre-, during (stim 1/2/3) and post-stimulation. Forward (black) and backward (gray) digit span performance are depicted for tACS (open circles) and sham (filled circles). Note the significant differences between groups in the forward digit span task during stimulation and between forward and backward condition. (B) Performance in the 3-back task before and after the stimulation phase for tACS (open circles) and sham stimulated groups (filled circles). Values are net scores (hit rate—false alarm rate). Error bars in both A and B denote ± one standard error of the mean. Significance levels are indicated by asterisks (*p < 0.05, **p < 0.01), all other comparisons were not significant.