Table 3.

Improvement on SPM after the training as reflected by paired-sample t-test.

	t	df	p	Cohen's d
20 Days group	2.93	19	0.009	1.34
10 Days group	1.27	19	0.220	0.58
5 Days group	0.95	19	0.355	0.44
2 Days group	0.19	14	0.854	0.10
0 Days group (Control)	0.19	19	0.855	0.09