Fig. 4.

Anodal tDCS over the LPFC, compared with the VC, increased the use of the GF strategy. (A) Schematic representation of the locations of the tDCS. (B) Percentage of using the GF strategy as a function of tDCS site and streak length. (C) The same result is plotted again by dividing the streaks into short streaks (≤3) and long streaks (≥4), revealing a clear streak length–by–stimulation site interaction. (D) The number of short and long streaks subjects made in their choices as a function of tDCS. The legend to Fig. 1 provides further details. Error bars represent within-subject error.