Figure 1.

Experimental paradigm. (A) In both experiments tDCS was applied for 15 min at the start of a session (top trace). In the tDCS-Before experiment (middle trace) subjects completed at least two blocks of trials following tDCS offset. In the tDCS-During experiment, trials began 20 s after tDCS onset and subjects completed an additional two blocks of trials after tDCS offset. (B) Example trial (Left-Cue condition). Subjects fixated centrally until the RDP disappeared. A noninformative cue appeared at an eccentricity of 8.08° just prior to the onset of the RDP. After 750 ms from the offset of the RDP, a cursor appeared at the center of the grid and subjects moved the cursor to the perceived centroid location.