Table 2.

Phenotypic and Twin Correlations Between the Two Child Psychopathy Scale Factors and Reactive and Proactive Aggression (Caregiver Reports)

Phenotypic correlations
	Callous & disinhibited			Manipulative & deceitful
Reactive aggression	.51*			.50*
Proactive aggression	.43*			.47*
	Intraclass and cross-twin cross-trait correlations
	Callous & disinhibited	Manipulative & deceitful	Reactive aggression	Proactive aggression
MZ male
Callous & disinhibited	.63*	.24*	.20*	.22*
Manipulative & deceitful		.50*	.31*	.24*
Reactive aggression			.48*	.33*
Proactive aggression				.61*
DZ male
Callous & disinhibited	.11	−.07	.13	.10
Manipulative & deceitful		.02	.07	.08
Reactive aggression			.35*	.17*
Proactive aggression				.34*
MZ female
Callous & disinhibited	.53*	.23*	.24*	.20*
Manipulative & deceitful		.58*	.35*	.30*
Reactive aggression			.60*	.41*
Proactive aggression				.57*
DZ female
Callous & disinhibited	.30*	.21*	.26*	.18*
Manipulative & deceitful		.35*	.37*	.32*
Reactive aggression			.46*	.38*
Proactive aggression				.48*
DZ OS
Callous & disinhibited	.26*	.18*	.26*	.25*
Manipulative & deceitful		.27*	.23*	.24*
Reactive aggression			.50*	.35*
Proactive aggression				.55*

Note. Intraclass correlations (presented with an underline) for parent reports of psychopathic personality traits and aggression have previously been reported on these data, please see text. DZ = dizygotic; MZ = monozygotic; OS = DZ opposite sex.

^*p < .05.