Table 1.

Interface Validation Summary Measures of Rater Performance _[bl1]

	# of Data Samples				Time ± Std. Dev.	Mean Error ± Std. Dev.
	Points	Spiral	Triangle	Ellipse	Set of Four	Points	Spiral	Triangle	Ellipse
Units	Count	Count	Count	Count	Seconds	Pixels	Pixels	Pixels	J.D.*
Mouse	101	101	103	101	133 ± 99	2.48 ± 5.29	0.63 ± 1.81	1.23 ± 6.99	0.058 ± 0.027
Gesture Tracking	130	132	135	131	97 ± 79	1.27 ± 0.64	0.43 ± 0.29	0.53 ± 0.53	0.054 ± 0.019
Two-sided t-test†					p =0.0024	p =0.011	p =0.22	p =0.25	p =0.24

^*JaccardDistance.

^†p-values reported for a two-sided t-test for a difference between mouse input versus gesture tracking metric.