Complementary analysis
RPE
The TTE in DLPFC tDCS was negatively correlated with RPE (rho = − 0.57; p = 0.035), but not correlated with VM’s EMG (r = − 0.15; p = 0.62), affective responses (r = 0.27; p = 0.34) or felt arousal (r = 0.19; p = 0.53).