Table 2.

Behavioral performance comparisons between the AIS and the control group.

	CoP excursion (mm)			SVV accuracy (%)			SVV reaction time (ms)
	AIS	Control	p1	AIS	Control	p1	AIS	Control	p1
D1	21.80 ± 5.92	22.63 ± 9.10	0.79	73 ± 18	77 ± 10	0.47	734.23 ± 163.96	630.82 ± 98.15	0.06
D2	47.53 ± 23.03	49.07 ± 15.95	0.84	76 ± 16	78 ± 10	0.75	638.10 ± 140.24	630.72 ± 126.80	0.89
D3	145.22 ± 48.71	159.65 ± 69.84	0.55	79 ± 15	79 ± 09	0.96	579.40 ± 119.45	617.18 ± 118.52	0.43
p2	0.00**	0.00**		0.19	0.11		0.00**	0.89

D1: feet shoulder-width apart, D2: feet together, D3: tandem stance.

p¹: group main effect, p²: posture main effect, p < 0.01^**.

Values are expressed as mean ± SD. For CoP excursion, both the AIS and control groups demonstrated the largest excursion in the tandem stance, followed by the feet together stance, and the smallest excursion in the feet shoulder-width apart stance. For SVV accuracy, both the AIS and control groups demonstrated equivalent SVV accuracy, regardless of the standing posture. For SVV reaction time (RT), the AIS group demonstrated the quickest RT in the tandem stance, followed by the feet together stance, and slowest RT in the feet shoulder-width apart stance. The control group demonstrated equivalent RTs, regardless of the standing posture.