Figure 4.

Visual search task with SAT manipulation. (a) Monkeys maintained gaze on a fixation point for 750–3000 ms to begin each trial. The colour of the fixation point (green or red) was consistently mapped for each monkey to either the fast or accurate conditions (here, green always corresponds to the fast condition). Then, an iso-eccentric array of T and L shapes appeared, one of which was defined as a target for that session; non-target distractors were drawn randomly from a non-target set. To earn liquid reward, monkeys made a single saccade to the target item and maintained gaze for 750 ms. Rewards and timeouts following errors differed between SAT conditions (see Heitz & Schall [81]). (b) Each of two monkeys produced a classic SAT, producing faster and more error prone responses in the fast condition than in the accurate condition.