Figure 5

Experimental Design of Experiment III.

(a) Screenshot of the HMD. A bar at the bottom of the display indicated the current head speed and a vertical line indicated the target head speed threshold. When the head speed exceeded the threshold, the bar changed from red to green. The participants were asked to maintain the target head speed. Scene switches occurred only when the participant's head speed exceeded the target speed (bar in green). Participants were asked to press a button upon identifying a scene switch. (b) Example time course of Experiment III for detecting the switch with the “Fast” instruction. The green line indicated actual head speed. A switch occurred after a short time had passed (randomly chosen from 5 to 15 sec) and when the head speed exceeded the instructed head speed. A response (button press) within 3 sec of the switch occurring was considered a correct response.