Fig. 4.

Saccadic velocity modulation and association with motivation. A. Average saccadic peak velocity for slow (red) and fast (green) saccade trial types. Error bars are average within subject standard error of the mean. B. Participants' ability to modulate saccade peak velocity (calculated as the average difference between fast and slow trial types for each participant) positively correlated with motivation level. Those with greater ability to modulate saccadic velocity had higher motivation score on the LARS-e. The panel to the right depicts different degrees of modulation for three different people, for illustrative purposes.