Figure 1.
Experimental setup. Before entering the experimental tDCS/ASL protocol, at the first session all participants underwent a T1‐weighted MRI scan of the brain used to locate and to accurately target the left dorsolateral prefrontal cortex (anode in red) with the Brainsight neuronavigation system (Brainsight™, Rogue Research, Inc.). Cathode in blue placed on the right supraorbital region. Participants were randomized to first receive active or sham tDCS, with reversing the order at session two. All were verbally assessed in the scanner with the VAS scales after ASL T1 and before stimulation; before ASL T2 and after stimulation; and after the audio recordings, before ASL T3. Therefore, for each participant, in total, six ASL measurements were collected. Rating possibilities were clearly visibly projected on a screen in the scanner. VAS = visual analog scales; ASL = arterial spin labeling; PC = perceived criticism [Color figure can be viewed at http://wileyonlinelibrary.com]