Fig. 9.

Free-viewing task of experiment 3 and its analysis. A: the monkey scanned a cloud pattern, and a transient full-screen flash occurred at a random time. Example eye movement scan paths are shown in cyan. B: we selected either baseline saccades occurring 20–200 ms before flash onset (black example saccade) or post-flash saccades occurring 50–150 ms after flash onset (brownish example saccade). Saccades were chosen such that, relative to the flash geometry (i.e., the screen extent), their starting and ending eye positions fell within the gray regions shown. Specifically, we split the screen into 9 equally sized virtual tiles; any saccade starting from a large region of 4 contiguous tiles abutting one corner of the display (e.g., the large gray box) and ending into a single tile in the opposite corner (e.g., the small gray box) was considered as a saccade for which the flash (i.e., the full-screen stimulus) had a center of mass less eccentric than the saccade goal location (similar to opposite movements in our earlier analyses with microsaccades). Note that we repeated this tiling procedure for all other corners of the screen. Thus, with such selection, we ensured that the center of mass of visual spikes associated with the full-screen flash was less eccentric than the center of mass of the saccade goal location (as in the schematic scenario of Fig. 1C), which would allow replication of previous human experiments (it is also conceptually similar to opposite microsaccades in Fig. 2). C: we confirmed that for these saccades, saccadic inhibition occurred in the monkey (e.g., gray region), as with earlier human experiments and our earlier microsaccade experiments. Error bars denote 95% confidence intervals.