Describes how developmental psychopathology differs from related disciplines, including abnormal psychology, psychiatry, clinical child psychology, and developmental psychology. Points out propositions underlying a developmental perspective and discusses implications for research in developmental psychopathology. (Author/RH)

Addresses strategies needed in using longitudinal data on psychopathology to test cause-and-effect relationships, including natural experiments, testing of competing hypotheses on mechanisms, study of reversal effects, multiple replications in different circumstances, use of designs to dissociate possible mechanisms, testing for dose-response…

Outlines what developmentalists can do with genes associated with behavioral dimensions and disorders once they are found. Suggests that genes can be used to answer questions about developmental continuities, psychopathological patterns such as heterogeneity and comoribidty, and environmental-risk mechanisms informed by studies of gene/environment…

The concept and measurement of psychopathy in young people is discussed with respect to five key issues: (1) the respective merits of self-reports and ratings by others; (2) whether callous/unemotional (CU) features may be more appropriately tapped by physiological measures; (3) the possible utility of genetic studies; (4) the distinctiveness of…