Table 1.

Descriptive statistics and zero-order correlations for each group separately (N = 250).

	(1)	(2)	(3)	(4)	n
G1 (INTERVENTION GROUP)
(1) Pr1_T1	0.80				137
(2) Pr2_T1	0.81	0.80			137
(3) Pr1_T2	0.51	0.52	0.74		113
(4) Pr2_T2	0.48	0.59	0.78	0.79	113
M	3.44	3.49	3.62	3.71	−
SD	0.75	0.72	0.60	0.62	−
Sk	−0.51	−0.60	−0.34	−0.61	−
Ku	−0.06	0.43	−0.13	0.02	−
G2 (CONTROL GROUP)
(1) Pr1_T1	0.77				113
(2) Pr2_T1	0.76	0.76			113
(3) Pr1_T2	0.74	0.67	0.75		91
(4) Pr2_T2	0.65	0.73	0.78	0.75	91
M	3.42	3.49	3.49	3.55	−
SD	0.70	0.71	0.65	0.64	−
Sk	−0.39	−0.55	−0.27	−0.41	−
Ku	−0.12	−0.01	−0.44	−0.49	−

Pr1_T1, Parallel form 1 of the Prosociality scale at Time 1; Pr2_T1, Parallel form 2 of the Prosociality scale at Time 1; Pr1_T2, Parallel form 1 of the Prosociality scale at Time 2; Pr2_T2, Parallel form 2 of the Prosociality scale at Time 2; M, mean; SD, standard deviation; Sk, skewness; Ku, kurtosis; n, number of subjects for each parallel form in each group.

Italicized numbers in diagonal are reliability coefficients (Cronbach's α).

All correlations were significant at p ≤ 0.001.