Table 1.

Descriptive statistical analysis.

Test	Group	N	M	SD	Kolmogorov–Smirnov		Levene
					Statistic	Sig	Statistic	Sig
Pre-test (SA)	Control	48	21.48	6.937
	Experimental 1	49	22.39	5.737
	Experimental 2	49	22.73	4.907
	Total	146	22.21	5.894	0.069	0.087	2.223	0.112
Post-test (SA)	Control	48	21.90	6.873
	Experimental 1	49	25.55	6.371
	Experimental 2	49	25.24	6.217
	Total	146	24.25	6.655	0.070	0.080	0.082	0.922
Post-test (3D-GT)	Control	48	33.33	9.318
	Experimental 1	49	39.39	9.434
	Experimental 2	49	39.67	10.693
	Total	146	37.49	10.198	0.103	0.001	1.376	0.256