		Mean	Standard deviation	t	sig
self-concept total score	Pre-test	65.36	4.52	−3.41	0.007
self-concept total score	Post-test	80.45	15.14	−3.41	0.007
interpersonal relationship	Pre-test	49.18	3.37	−0.72	0.049
interpersonal relationship	Post-test	49.81	2.60	−0.72	0.049