Objective Research and clinical interest in irritability have been on the rise in recent years.
Yet several questions remain about the status of irritability in psychiatry, including whether …

This article reviews behavioral-genetic research to show how it can help address questions
of causation in developmental psychopathology. The article focuses on studies of antisocial …

Behavioral Genetics, Fifth Edition provides an engaging and clear overview of human and
animal behavioral genetics that is designed to introduce students in the behavioral …

If maternal expressed emotion is an environmental risk factor for children's antisocial
behavior problems, it should account for behavioral differences between siblings growing up …

When genetic similarity is controlled, siblings often appear no more alike than individuals
selected at random from the population. Since R. Plomin and D. Daniels' seminal 1987 …

There have been strong critiques of the notion that environmental influences can have an
important effect on psychological functioning. The substance of these criticisms is …

Background: This paper reviews recent evidence on the causes and maintenance of
aggressive and disruptive behaviours in childhood and adolescence. It considers the …

Objective: To review recent developments in the study of nonshared environment; that is, the
environmental influences that make children growing up in the same family different, rather …

Twins are nature's living laboratories. Through them we are able to uncover new information
concerning the genetic and environmental factors affecting who we are. Studies using …

The importance of non-shared environment lay hidden within quantitative genetic studies
since they began nearly a century ago. Quantitative genetic methods, such as twin and …