Proportions of the phenotypic correlations between ADHD symptoms and vocabulary scores due to genetic (A), shared environmental (C) and non-shared environmental (E) influences.

ADHD = attention deficit hyperactivity disorder; rph = phenotypic correlationaProportions of the phenotypic correlation due to total genetic or environmental influences (i.e. transmitted plus age-specific effects).bProportions of the phenotypic correlation due to time-specific genetic or environmental influences specific to early adolescence.Figures in parentheses refer to the absolute contributions of A, C and E respectively to the phenotypic correlations between ADHD symptoms and vocabulary scores.Proportions of the phenotypic correlations between ADHD symptoms and vocabulary scores due to genetic (A), shared environmental (C) and non-shared environmental (E) influences.