if retrospective recall is genetically influenced, then the heritability of antisocial behavior might be expected to increase as the length of the recall time increases. This pattern was not observed in our study, as the heritability of antisocial behavior was greater in adulthood than in childhood. Furthermore, our variance component estimates for CD closely match the estimates obtained from population-based studies of child and adolescent self-reported delinquency and conduct disorder (Eaves et al., 1997; Taylor, McGue, & Iacono, 2000). For the purposes of our study, though, the main threat of retrospective reporting is that sex differences in recall might account for our finding of sex-specific genetic or shared environmental influences on CD. This is unlikely because the accuracy of retrospective reports of delinquent behavior tend to be similar for males and females (Henry et al., 1994, and the present study).
