Table 1. Correlations of the vertical and horizontal variables with their appropriate and inappropriate dimensions of target location.

	R2
Correlation	User A	User B	User C	User D
Vertical variable with vertical target level	0.44	0.31	0.40	0.54
Vertical variable with horizontal target level	0.00	0.00	0.01	0.01
Horizontal variable with horizontal target level	0.48	0.29	0.27	0.54
Horizontal variable with vertical target level	0.00	0.00	0.01	0.01