Comments on Lewis's ideas about reconciling stage and specificity in neo-Piagetian theory in this issue. Focuses on whether general stages, domain specificity, and individual diversity are compatible from a nonlinear, dynamic perspective. Suggests that, by using catastrophe theory, intra- and interindividual diversity and domain specificity can be…

To resolve tension between general stages and conceptual specificity in neo-Piagetian theory, R. Case introduced the idea of central conceptual structures. To resolve difficulties of separating developmental level and conceptual diversity, this article reconceptualizes central conceptual structures as self-organizing systems that stabilize in…

Comments on Lewis's ideas about reconciling stage and specificity in neo-Piagetian theory in this issue. Summarizes R. Case's central conceptual structure and its relation to other neo-Piagetian theories. Notes similarities between Lewis and Piaget, suggesting that differences adhere to a limited number of general laws instead of being…

Comments on revision of Piagetian theory of reciprocity in forgiveness by Enright (PS 522 365) in this issue. Reviews relationship of Enright theory to previous research. Suggests that forgiveness may require moral insights in addition to reciprocity, but reciprocity appears central to children's and adults' understanding of forgiveness. Provides…

Proposes a cognitive mechanism that makes forgiveness possible. Revises Piaget's theory that ideal reciprocity is the underlying cognitive operation that makes understanding and appreciation of forgiveness possible. Draws on modern philosophical inquiry, empirical study, and theory to argue instead that abstract identity provides--philosophically…