Argues that causal understanding is a developmental primitive: children develop core concepts of causality at a very early age, causality plays a necessary role in subsequent development across many domains, and basic causal processes can be activated automatically or implicitly. (HTH)

Compares concepts defining Kohlbergian stages of moral development with those associated with orders of hierarchical complexity determined with a generalized content-independent stage-scoring system. Finds that Kohlberg's sequence generally matches that identified with the scoring system and that contract and authority concepts match the concepts…

Conducted meta-analysis of experiments comparing duration judgments of children, adolescents, and adults. Found that children made larger verbal estimates, comparable productions, shorter reproductions of durations, and more variable judgments than did older participants. Concluded that explanations are needed for children's inaccurately learned…

Discusses hierarchical complexity of tasks as a way of conceptualizing information in terms of the power required to complete a task, and its implications for developmental psychology and information science. Provides an analytic solution to the definition of developmental stages and allows for the possibility within the science of scaling the…