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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Neuroimage. 2016 Jan 29;129:356–366. doi: 10.1016/j.neuroimage.2016.01.049

Table 2.

Correlations between general cognitive ability (GCA) and the relative cortical surface area (SA) and thickness (CT) high-expanded – low expanded difference scores.

GCA
Phenotypic correlations
    Surface area .15 (.05; .24)
    Thickness −.11 (−.20; −.01)
Genetic correlations
    Surface area .26 (.06; .50)
    Thickness −.11 (−.27; .05)
Unique environmental correlations
    Surface area .03 (−.13; .19)
    Thickness −.15 (−.31; .02)

Note. Relative SA difference score = (SA of high-expanded ROI – SA of low-expanded ROI)/ total SA. Relative CT difference score = mean CT of high-expanded ROI - mean CT of low-expanded ROI (see Fig. 1). Statistically significant (p <.05) correlations are in bold (95% confidence intervals in parentheses). Correlations are derived from the Model 2 in Table 1.