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. Author manuscript; available in PMC: 2014 Mar 1.
Published in final edited form as: Behav Genet. 2013 Jan 31;43(2):97–107. doi: 10.1007/s10519-013-9584-z

Figure 1.

Figure 1

Phenotypic correlations and biometric decomposition (leading decimals were removed). Shown here are the phenotypic correlation matrix, as well as the additive genetic, shared environmental, and non-shared environmental component matrices. In parentheses are the 95% maximum likelihood confidence intervals. The component matrices are scaled such that they sum elementwise to produce the full phenotypic matrix. All entries are significant at p < .05. Estimates are based solely on the twins, who have an average age of 17 years. NIC = Nicotine Use/Dependence; CON = Alcohol Consumption; DEP = Alcohol Dependence; DRG = Drug Use; BD = Behavioral Disinhibition.