Fig. 1.

Experimental setup. Three black circles indicate the projection on the floor of the location of monitors in the transverse plane. A center monitor was positioned 2 m away from the treadmill center at eye level (1.6 m from the treadmill) and two side monitors were positioned 45° horizontally (Hor) and 22.5° vertically (Ver) above (top-left) and below (bottom-right) from the center monitor. The root mean square distance from the estimated eye position to each monitor screen was equal to 2 m.