| Abstract: | Drawing on a large sample of genetically related pairs of adolescents from the Add Health, we examine the influence of sibling deviance on adolescents' participation in minor deviance compared to the influence received from mutual friends (i.e., friends shared between siblings) and influence from unique friends (i.e., friends unique to each sibling). Multivariate analyses that control for genetic relatedness using DeFries‐Fulker regression (1985) indicate that after aspects of the shared and non‐shared environment of siblings are accounted for, the heritability effect, capturing genetic relatedness in sibling deviance, is no longer significantly associated with deviance. The deviance of siblings' unique friends accounts for a large portion of the heritability effect of sibling deviance. |
