Figure 1

(a) Illustration of the timeline in Experiment 1. Ocular dominance was measured at baseline (Pre), before tDCS at the 90th minute of MD (PreStim) and immediately after 2 h of MD (Post). (b) Illustration of the timeline for Experiment 2. Ocular dominance was measured at baseline (Pre) and immediately after 30Â min of MD (Post). In both experiments, a-tDCS, c-tDCS or sham stimulation was delivered to the visual cortex during the final 20Â min of MD. (c) Examples of the two ocular dominance tests. Participants viewed the stimuli dichoptically. In the grating rivalry test, participants continuously pressed one of four buttons to indicate their perception. In the letter-polarity test, participants pressed the up or down arrow key to indicate the letter that they perceived as brighter than the other.