Table 2. KOP scores of control and intervention groups on pre- and post-tests .

	Groups		T Test
	Control	Intervention	t	df	P
Pre-test	6.47 ± 2.61	6.91 ± 2.95	-0.828	111	0.409
Post-test	8.29 ± 3.25	9.48 ± 3.01	-2.017	111	0.046