Table 1.

Behavioral performance and Impulsive/Premeditated Aggression Scale (IPAS) Scores of impulsive and premeditated groups.

	Impulsive (N = 23)		Premeditated (N = 21)
	Mean	SD	Mean	SD	t	p
Response time	349.81	56.44	384.89	43.02	−1.736	0.096
Hits (%)	96.85	6.012	99.00	1.48	−1.251	0.232
False alarms (%)	12.46	14.65	3.92	4.52	2.002	0.064
Log β	−2.34	1.47	−2.227	1.30	0.356	0.825
d′	3.31	1.15	3.16	0.97	−0.224	0.725
Impulsive scale
Positive items	4.15	1.99	4.00	2.89
Percentage (%)	52.92	25.1	32.67	23.92	4.245	0.001**
Premeditated scale
Positive items	2.92	1.73	5.42	2.88
Percentage (%)	36.46	21.62	45.14	23.96	−1.562	0.0147*

*p < 0.05; **p < 0.01.