“…These experiments have been conducted using real environments (Brandt, Arnold, Bles, & Kapteyn, 1980;Diener et al, 1984;Edwards, 1946;Guerraz, Sakellari, Burchill, & Bronstein, 2000;Lasley, Hamer, Dister, & Cohn, 1991;Paulus et al, 1984;Paulus, Straube, Krafczyk, & Brandt, 1989;Stoffregen, Smart, Bardy, & Pagulayan, 1999;Witkin & Wapner, 1950), as well as virtual environments (Dijk stra et al, 1992;Kelly et al, 2005;Mitra, 2003;Mitra & Fraizer, 2004). To our knowledge, no direct comparison of postural control in stationary real and virtual environments has been conducted.…”