Fig. 1.

STT. Participants were required to quickly press in response to a left- or right-pointing arrow. Occasionally, an upward-pointing triangle was presented above the location of the arrow stimulus, and participants must withhold the button press (stop trials). Similarly, when a downward-pointing triangle appeared above the location of the arrow stimulus, participants should execute the go response and ignore the triangle signal (continue trials). When a yellow triangle appeared, fast and correct responses resulted in a ¥0.2 gain (RR); incorrect or slow responses incurred a loss of ¥0.2. Responses to the blue triangle resulted in a ¥0 gain or penalty (RU).