Virtually nothing is known about the role that tone of voice may play in motivating interactions. Herein, we use an experimental approach to explore for the first time how the same directive instructions ("Do well at the play") have different effects on adolescents depending on the motivational tone of voice used to convey these…

A bias toward attributing hostile intent to others has been linked to aggression. In an adolescent sample, the question of whether peer group homophily exists in the tendency toward attributing hostile intent was investigated. Hostile attribution tendencies and self-reported aggressive behaviors were assessed in a normative sample of 910…

In a sample of 7,695 families in the prospective, nationally representative British Millennium Cohort Study, this study examined whether characteristics of the 1st-born child predicted parents' timing and probability of having another child within 5 years after the 1st child's birth. Infant temperament was assessed with the Carey Infant…