Table 1

Mean (SD) distribution of correct responses on low and high load tasks, under each postural control condition. The maximum number of correct responses possible was 16

		Sitting				Standing			Destabilised^1-150
		Mean	Skew^1-151			Mean	Skew		Mean	Skew
Low load tasks:
Spatial	15.83 (0.53)	−3.65		15.72 (0.65)	−2.74		15.51 (0.96)	−2.11
Non-spatial	14.63 (2.02)	−2.36		14.63 (1.62)	−0.42		14.47 (1.96)	−2.20
High load tasks:
Spatial	10.44 (3.53)	−0.49		9.45 (3.38)	−0.34		10.19 (3.47)	−0.06
Non-spatial	12.39 (3.08)	−0.93		12.21 (3.03)	−0.49		12.52 (2.80)	−0.93

↵1-150 Figures for the destabilised condition are not directly comparable with figures for the sitting and standing conditions, as only a subsample of patients completed the destabilised condition.
↵1-151 Skew is an index of the assymetry of the distribution of scores on a variable.