Table 1.

Summary of statistical analysis: three feedback methods include A (audio-only feedback), V (visual feedback) and C (combined audiovisual feedback)

		df	F	t	z	p	sig	d	Effect
Accuracy (MANOVA)		2,10	2.23			0.16		1.34	large
Contrast Tip	A vs V and C	11		1.29		0.22		0.39	small
	V vs. C	11		2.00		0.07		0.60	medium
Contrast Handle	A vs V and C	11		1.18		0.26		0.36	small
	V vs. C	11		0.42		0.68		0.13	no effect
Task Completion Time (MANOVA)		2,10	46.18			<0.01	*	6.00	large
Contrast Tip	A vs V and C	11		3.85		<0.01	*	1.16	large
	V vs. C	11		1.07		0.31		0.32	small
Contrast Handle	A vs V and C	11		4.71		<0.01	*	1.42	large
	V vs. C	11		0.21		0.84		0.06	no effect
Subjective Workload (ANOVA)		2,22	21.73			<0.01	*	2.79	large
	A vs V and C	11		5.61		<0.01	*	1.69	large
	V vs. C	11		0.54		0.60		0.16	no effect
Viewing Duration (Wilcoxon signed-rank test)
	V vs. C				2.52	0.01	*	1.20	large