Fig. 4.

Effects of anodal and cathodal tDCS relative to sham stimulation on choices in the pre-delay phases of the precommitment, opt-out, and no-delay conditions. The y-axis indicates the percentage of precommitment choices in the precommitment condition and the percentage of choices of the larger reward in the opt-out and no-delay conditions. Relative to sham tDCS, anodal FPC stimulation increased the number of precommitment decisions but showed no effects on the control conditions. There were no significant effects of cathodal tDCS on task performance. An asterisk (*) indicates a significant effect at a threshold of P  <  0.05. Error bars indicate SEM.