. Author manuscript; available in PMC: 2010 Jun 1.

Published in final edited form as: Brain Cogn. 2009 Feb 24;70(1):145–153. doi: 10.1016/j.bandc.2009.01.005

Table 4.

Familial correlations for IQ and EF residualized for IQ for all relationships in study, combined and separated by gender

Relationship	IQ correlation	N	EF correlation (5 component average)	N	EF correlation (3 component average)	N	Residualized EF correlation (3 component average)	N
Parent:offspring^a	.45^***	1014	.36^***	698	.24^***	705	.15^***	806
Father:son	.45^***	344	.26^***	232	.15	232	.05	275
Mother:son	.42^***	353	.45^***	268	.35^***	257	.31^***	300
Father:daughter	.49^***	154	.45^**	92	.35^***	103	.24^**	108
Mother:daughter	.49^***	164	.22^**	108	.04	106	-.06	123
Sibling	.50^b ^***	303	.24^***	267	.15^*	267	.04^b	202
Brother:brother	.29^***	88	.40^***	105	.24^**	105	.08	53
Sister:brother	.55^***	198	.16^**	151	.10	151	.05	138
Sister:sister	.81^***	17	-.04	9	-.19	11	-.29	11
Spouse	.45^***	266	.31^***	169	.19^**	168	.09	227

p<.05,

^**

p<.01,

^***

p< .001

These correlations are based on entire sample available and include some in the study who do not have EF data

Homogeneity tests show that there is significant variation in correlations among these groups (p < .05)