The results of the univariate and bivariate behavior genetic analyses are shown in Table 5. A small portion of the variance in maltreatment appears to be associated with additive genetic influences (A), a moderate amount with shared- (C) and twin-environmental (T) influences, and a large amount with nonshared environmental influences and measurement error (E). A moderate portion of the variance in conduct problems is due to A, a negligible portion to C, a small to moderate portion to T, and a moderate portion to E.
