Background: Attention-deficit/hyperactivity disorder (ADHD) symptoms and mathematics ability are associated, but little is known about the genetic and environmental influences underlying this association. Methods: Data came from more than 6,000 twelve-year-old twin pairs from the UK population-representative Twins Early Development Study. Parents…

Objective: To examine sex differences in correlates of disruptive behavior disorders (DBDs) in preadolescent children using indicators of a wide range of well-established risk factors for DBDs and outcomes 3 years after initial assessment. Method: Analyses were based on data for 5- to 10-year-olds (n = 5,913) from the British Child and Adolescent…

Objective: To discover the outcomes for children placed late for adoption (between 5 and 11 years old) from public care and to establish which factors predict poorer outcome. Method: Data were collected prospectively (1993-2003) from a representative sample of domestic U.K. adoptive placements (N = 108) at the start of placement, at 1 year, and 6…

This essay examines the youth policies and programs of the United Kingdom, Australia, Germany, Sweden, and Norway in an effort to provide examples that may be of assistance in the development of such policies in the United States. Chapter 1 provides an overview of the topic, noting that the focus is on younger adolescents between the ages of 10…