Figure 3.

Example of eye and head responses to moving stimuli for participant S1. Panels A and B respectively display the eye and head movement during a single trial in which a 30°/s left-moving stimulus was presented. Panels C and D respectively display the average (± SD) eye and head movement over all trials in which a 30°/s left-moving stimulus was presented and correctly identified. Eye and head position are measured relative to the position at stimulus onset (t = 0). Positive values on the y-axis indicate rightwards horizontal movement (blue lines) or upward vertical movement (red lines). Note that the y-axis scale is different for head movement (B, D) compared to eye movement (A, C) because head movement was minimal.