Fig. 1.

On each trial of the Nemo task, participants were instructed to respond with a left or right button press to each stimulus, based on the relevant rule for that trial (Color or Direction). 200 ms before the start of a trial, a crosshair alerted participants to fixate to the center of the screen. The instructional cue, “Color” or “Direction”, appeared for 2300 ms, followed immediately by a cartoon stimulus. Participants had 1500 ms to respond to this target stimulus. Each trial was followed by a variable-duration inter-trial interval (ITI) of 2–8 s.