Figure 5

Monkeys’ performances when microsaccades occurred around the target color change under the easy and hard conditions. (A,E) The RT as a function of when microsaccades occurred around the color change onset. The vertical lines indicate the occurrence of a target color change. The horizontal dashed lines represent the average RT of all trials in which there were no microsaccades occurring within 350 ms around the target color change. There was a tendency toward longer RTs when microsaccades occurred during this period. (B,F) Same as in A, E but for the correct percentage. In both monkeys, microsaccades occurring around the response event were correlated with a decrease in accuracy. (C,G) Comparisons of the overall RT between the with- and without-microsaccade situations in both easy and hard tasks from the two monkeys. (D,H) Same as in C, G but for the overall accuracy. Error bars indicate SEM, and asterisks represent statistical significance (***p < 0.0001, **p < 0.001, *p < 0.05).