Lawrence Kohlberg first published details of his research on the development of moral judgments in "Vita Humana" (later titled "Human Development"). Along with a series of other articles and essays, he greatly influenced research on moral development. He was instrumental in moving the field out of the narrow confines of analyses of psychological…

To bring out Giyoo Hatano's contributions to the understanding of culture and cognitive development, we note first his special style--thoughtful, inventive, and always focused on central issues and on combining theory with data--and then, for three areas, some of the conceptual advances he proposed. The areas have to do with ties between cognitive…

In this article, we trace the development of Hatano's research, focusing on the core of his research interest, namely, expertise, conceptual development, and classroom learning. He held both Piagetian constructivist views and Vygotskian sociocultural perspectives in balance, and preferred to study human cognition executed in everyday life. This…