Tying together almost four decades of neo-Piagetian research, Cognitive Development provides a unique critical analysis and a comparison of concepts across neo-Piagetian theories. Like Piaget, neo-Piagetian theorists take a constructivist approach to cognitive development, are broad in scope, and assume that cognitive development is divided into stages with qualitative differences. Unlike Piaget, however, they define the increasing complexity of the stages in accordance with the child’s in...