Group	Factors	Mean		Standard Deviation		t	Sig.
Group	Factors	Pre	Post	Pre	Post	t	Sig.
Intervention	Verbal	4.78	6.46	2.605	2.762	−8.305	0.000*
Intervention	Non-verbal	12.12	12.72	4.061	3.846	−2.638	0.009*
Control 1	Verbal	5.06	6.12	2.353	2.479	−5.568	0.000*
Control 1	Non-verbal	12.83	12.86	3.502	4.049	−0,113	0.910
Control 2	Verbal	5.15	5.71	2.722	2.870	−2.996	0.003*
Control 2	Non-verbal	12.60	12.83	3.549	3.739	−0.995	0.321