Figure 2.

Serial reaction time task (SRTT)

Volunteers are seated in front of the computer screen with their 6 fingers (no pinkies and thumbs) placed on the 6 keys matching the 6 positions on the screen. Every time one of the 6 squares lights up, the participant has to press as fast and accurately as possible the corresponding key. Each time a key is pressed, an auditory tone matching this position/key is played before the apparition of the next cue (ISI = 500 msec). One block is composed of 96 trials (either sequential or pseudo-random).