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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: J Exp Psychol Gen. 2016 Apr;145(4):451–466. doi: 10.1037/xge0000146

Table 3.

Phenotypically Standardized Covariances between the Cognitive Latent Variables.

Phenotypic Correlation (rp) = Genetic (cova) + Nonshared Environmental (cove)
1. 2. 3. 1. 2. 3. 1. 2. 3.
1. WM - - -
2. IN .57 [.47, .66] - .53 [.42, .65] - .03 [−.06, .11] -
3. PS .51 [.45, .58] .52 [.43, .61] - .52 [.44, .60] .47 [.35, .59] - −.01 [−.06, .05] .05 [−.04, .14] -
4. NS .50 [.42, .57] .38 [.27, .48] .61 [.54, .67] .43 [.33, .52] .30 [.15, .44] .48[.38, .57] .07 [.00, .14] .08 [−.04, .19] .13 [.07, .20]

Note: Numbers in bold are significant at p < .05 as judged by 95% confidence intervals. WM = Working Memory Latent Variable; IN = Inhibition Latent Variable; PS = Processing Speed Latent Variable; NS = Naming Speed Latent Variable.