Figure 9.

Comparison of the time course of stimulus selectivity between Easy (top) and Difficult (bottom) conditions in monkey 1 (left) and monkey 2 (right). The difference in firing rate was calculated between the best and worst stimuli in a 40 ms window sliding with 40 ms steps. Time 0 represents the onset of the first stimulus. The best and worst stimuli were determined for individual cells in the fixed large window from 80 to 580 ms after the stimulus onset. Only cells that showed significant stimulus selectivity contributed. Error bars represent the SEM.