We used structural equation modeling in the Early Childhood Longitudinal Study--Kindergarten Cohort (N = 17,020) to explore the influence of having an older sibling on kindergarten-age focal children's cognitive self-regulation. In model 1, we tested how having a sibling who is generally older than the focal child contributes to the focal child's…

Although attitudes strongly predict later sexual behaviors, few studies have investigated the factors that influence early adolescent attitudes toward sex. Using a general population sample of urban seventh-grade students (N = 1,736), we examined how supportive parenting, television viewing, perceived social norms, and having a friend and/or…