Figure 7.

An example of a “boomerang” saccade that was successfully split. All data points in the figure were originally marked as part of one saccade. Saccade speed (dps) is plotted relative to STIM onset and is shown directly over the saccade path. Only four data points (highlighted in black) occurred below the speed threshold (dashed horizontal line, 20 dps), and two of them delineate PSOs (b1,b2), which are considered part of the saccade for better endpoint accuracy. Grey vertical lines indicate local nadirs. One local nadir (blue dot, labeled “mid”) was used to delineate the two saccades, which are color-coded magenta and cyan. In the position figure, the center red FIX indicates that this was an anti-saccade trial. The black dot on the right (10 degrees) indicates where the STIM was presented. Originally, this would have been marked as a correct anti-saccade that started at the FIX and ended near the correct location. After the split, there is a clear direction error toward the STIM, followed by a corrective saccade.