Figure 1. Description of the MDOR task.

(A) Trial structure. After a randomised fixation period of 0.5–1.5 s, the target appeared 5 degrees to either the left or right. Participants were instructed to look to the target position when it disappeared (i.e. saccade on offset). (B) Trial and response timings. Targets were displayed for either 200 ms or 1,000 ms. The example correct saccade, executed in response to a target displayed for 1,000 ms, occurs after the offset. The example error saccade occurs soon after the onset, well before either of the possible offsets.