Appendix 1—figure 2. Relationships between urgency and measures of arousal in Experiment 1 (upper panel) and Experiment 2 (lower panel).

(a, c) Urgency (gap duration) was associated with pupil size in both congruency conditions (average pupil size was assessed over 1 s after manual responses and z-scored across the trials of each session, see methods). (b, d) Likewise, urgency was associated with the peak velocity (relative to saccade amplitude) of the first saccade after target onset in both congruency conditions (see methods for saccade detection criteria).