Malnutrition can be defined as a lack of a sufficient quantity or quality of nutrients to maintain the body system at some definable level of functioning. It has been estimated that nearly half the children in the world today grow and develop under conditions of protein or protein-calorie malnutrition sufficient to impair their physical…

Comments on problems raised in this special issue, focusing on the distinctive aspects of the risk research reported. Highlights issues like sample characteristics, measurement strategies, specificity of risk factors, and risk mechanisms. Discusses the challenges of integrating alternative models of risk, with special references to research into…

Comments on research problems raised in this special issue. Suggests that recent research highlights the nature of the multiple processes underlying variability in child and adolescent adjustment. Views variability as a function of covarying influences from multiple domains, operating on specific developmental outcomes across a background of time…

Comments on the special theme issue examining the roles of socialization, biology, and culture as they affect adaptive and maladaptive developmental outcomes. Proposes a theory-guided research approach, based on four assumptive components of contemporary developmental theories: systematic change and relative plasticity; relationism and…

Comments on this special theme issue examining the roles of socialization, biology, and culture as they affect adaptive and maladaptive developmental outcomes. Presents models for predicting and understanding behavioral and affective change at transitions occurring especially from middle childhood through adolescence. Provides examples…