Table 6.

Phenotypically Standardized Covariances between Common and Unique Variance in the Cognitive Latent Variables with Dimensions of Reading Ability.

	Phenotypic (rp)	=	Genetic (cova)	+	Nonshared Enviorn. (cove)
Common Reading
Common Cognitive Variance	.61 [.54, .69]		.57 [.49, .65]		.05 [.02, .08]
Unique Working Memory	.37 [.27, .46]		.37 [.26, .47]		.00 [.00, .05]
Unique Processing Speed	.16 [.06, .26]		.12 [.01, .22]		.05 [.00, .09]
Unique Naming Speed	.03 [−.06, .10]		.07 [−.04, .16]		−.03 [−.08, .03]
Unique Word Reading
Common Cognitive Variance	.64 [.56, .71]		.57 [.49, .65]		.07 [.03, .10]
Unique Working Memory	.30 [.20, .39]		.29 [.19, .39]		.01 [.00, .06]
Unique Processing Speed	.21 [.11, .31]		.13 [.02, .23]		.08 [.03, .13]
Unique Naming Speed	.01 [−.07, .10]		.05 [−.05, .15]		−.04 [.10, .03]
Unique Listening Comprehension
Common Cognitive Variance	.23 [.19, .34]		.27 [.14, .39]		−.03 [−.11, .04]
Unique Working Memory	.29 [.17, .41]		.29 [.14, .44]		.00 [−.10, .10]
Unique Processing Speed	.09 [−.04, .22]		.09 [−.05, .24]		.00 [−.12, .11]
Unique Naming Speed	.08 [−.03, .20]		.06 [−.09, .21]		.02 [−.11, .15]

Note: Numbers in bold are significant at p < .05 as judged by 95% confidence intervals.