Table 5.

Independent samples t-test of pre- and post-test SPD scores between the intervention and control groups.

Subjects	Group (mean ± SD)		t	p
	Control group (n = 30)	Intervention group (n = 30)
Pre-test SPD	33.03 ± 3.41	32.93 ± 3.69	0.109	0.914
Post-test SPD	34.13 ± 5.49	41.77 ± 6.85	−4.763	0.000**

*p < 0.05, **p < 0.01.