It is concluded that a child's separation from his family constitutes a potential cause of short-term distress but separation is of little direct importance as a cause of long-term disorder. (Author)

Discusses ambiguities in research that arise from the fact that chronological age reflects different components. Considers methodology, components of age as indices of different aspects of development, differential effects of experiences according to their timing, and maturational delay. (RJC)

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…