Objective: Callous-unemotional (CU) traits in children and adolescents are increasingly recognized as a distinctive dimension of prognostic importance in clinical samples. Nevertheless, comparatively little is known about the longitudinal effects of these personality traits on the mental health of young people from the general population. Using a…

Background: Assessments of child psychopathology commonly rely on multiple informants, e.g., parents, teachers and children. Informants often disagree about the presence or absence of symptoms, reflecting reporter bias, situation-specific behaviour, or random variation in measurement. However, few studies have systematically tested how far…

Background: In most countries, the majority of children with attention deficit/hyperactivity disorder (ADHD) are undiagnosed. In the United Kingdom, a major barrier to accessing specialist services is the limited recognition of disorders by general practitioners. However, it is unclear whether there are also barriers at other stages of the…