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Viding, Essi; Jones, Alice P.; Paul, J. Frick; Moffitt, Terrie E.; Plomin, Robert – Developmental Science, 2008
A previous finding from our group indicated that teacher-rated antisocial behaviour (AB) among 7-year-olds is particularly heritable in the presence of callous-unemotional (CU) traits. Using a sample of 1865 same-sex twin pairs, we employed DeFries-Fulker extremes analysis to investigate whether teacher-rated AB with/without CU traits also shows…
Descriptors: Twins, Antisocial Behavior, Young Children, Heredity
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Asbury, Kathryn; Dunn, Judith F.; Plomin, Robert – Developmental Science, 2006
This longitudinal monozygotic (MZ) twin differences study explored associations between birthweight and early family environment and teacher-rated behaviour problems and academic achievement at age 7. MZ differences in anxiety, hyperactivity, conduct problems, peer problems and academic achievement correlated significantly with MZ differences in…
Descriptors: Behavior Problems, Academic Achievement, Hyperactivity, Effect Size
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Sonuga-Barke, Edmund J. S.; Auerbach, Judith; Campbell, Susan B.; Daley, David; Thompson, Margaret – Developmental Science, 2005
In this paper we examine the characteristics of preschool attention deficit hyperactivity disorder (ADHD) from both mental disorder and developmental psychopathology points of view. The equivalence of preschool and school-aged hyperactivity as a behavioral dimension is highlighted together with the potential value of extending the use of the ADHD…
Descriptors: Mental Disorders, Child Development, Developmental Stages, Hyperactivity