Frequency distribution of gaze fixations directed to the stairs relative to participants’ stepping location.

<p>Positive step numbers are the steps on the stairs. Frequency represents all fixations observed across all participants. Numbers at the top of the bars represent the number of participants contributing with fixations. Step “zero” represents the step ending with the last foot contact on the ground prior to the stairs. CONTROL and ART (A), and TARGET and VRT (B) were plotted in two difference graphs due to the large difference in scale.