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. 2022 Jul 18;13:928145. doi: 10.3389/fpsyt.2022.928145

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Copyright © 2022 Kannen, Aslan, Boetzel, Herrmann, Lux, Rosen, Selaskowski, Wiebe, Philipsen and Braun.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) 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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Results of the d2 attention test (d2). Values depict means and SEMs for the sham stimulation (blue bars) and actual stimulation (red bars) before and after intervention. (A) Processing speed depicts the total number of characters processed on average for each condition. (B) Concentration performance depicts the number of correctly identified characters minus all conducted errors averaged for each condition. (C,D) Number of omission and commission errors averaged for each condition. *p < 0.05, ***p < 0.001.