Table 1.

Descriptive statistics and gender differences for all observed study variables

	T1 (N = 502)a				T2 (N = 456)				T3 (N = 206)
	Boys (n = 253)		Girls (n = 241)		Boys (n = 228)		Girls (n = 227)		Boys (n = 106)		Girls (n = 100)
	M	SD	M	SD	M	SD	M	SD	M	SD	M	SD
Machiavellianism	2.75	1.60	2.30	1.59	3.15	1.81	2.84	1.71	3.31	1.58	2.89	1.72
Psychopathy	3.03	1.57	2.80	1.65	3.44	1.74	3.22	1.78	3.76	1.79	3.00	1.83
Narcissism	3.72	1.84	3.33	1.84	4.06	1.79	3.91	1.88	3.86	1.74	3.27	1.89
Moral Disengagement	1.94	0.48	1.82	0.56	2.05	0.51	1.79	0.46	2.16	0.45	1.83	0.49
Direct aggression	1.52	0.55	1.36	0.55	1.60	0.61	1.40	0.49	1.70	0.64	1.34	0.42
Indirect aggression	1.38	0.44	1.34	0.46	1.44	0.49	1.39	0.43	1.48	0.51	1.30	0.37
Delinquency	1.53	0.54	1.46	0.60	1.64	0.68	1.43	0.44	1.51	0.64	1.31	0.41

^aEight participants did not report their gender