Rb. Goldstein et al., Genetic and environmental factors in conduct problems and adult antisocialbehavior among adult female twins, J NERV MENT, 189(4), 2001, pp. 201-209
Most twin and adoption studies of conduct problems have demonstrated modest
genetic effects but substantial contributions of shared family environment
. Conversely, most investigations have shown marked genetic influences but
modest contributions of shared family environment in adult antisocial behav
ior. However, most previous work has focused on male subjects. We obtained
retrospective reports of DSM-III-R-defined conduct disorder (CD) and adult
antisocial behaviors from a population-based sample of female-female twin p
airs. Genetic and environmental contributions to conduct problems and adult
antisocial behaviors were examined using polychoric correlation coefficien
ts and univariate structural equation modeling. Statistically significant b
ut modest heritability was observed for conduct problems. A small, statisti
cally nonsignificant contribution of shared family environment to CD behavi
or was also noted. Adult antisocial symptoms showed modest contributions of
both additive genetic and shared family environmental factors. In both chi
ldhood and adulthood, the largest influence on antisocial behavior was indi
vidual-specific environment. Our findings support the importance of both ge
netic and environmental factors in antisocial behavior among women as well
as the possibility that the relative importance of each set of influences d
iffers by sex in both childhood and adulthood.