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. 2018 Oct 30;9:2059. doi: 10.3389/fpsyg.2018.02059

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Copyright © 2018 Lazar, Butz, Baumgarten, Füllenbach, Jördens, Häussinger, Schnitzler and Lange.

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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Experimental setup. Participants fixated a central gray dot. A decrease in luminance indicated the start of the stimulation period. After a jittered period of 900–1100 ms, participants received one or two electrical stimuli with varying SOA (0–400 ms) on their left index finger via ring electrodes. After another jittered period (500–1200 ms), visual response instructions were presented and participants reported their subjective perception (“1” vs. “2”) by button press with their right hand.