This volume is the result of a symposium titled "Constructivist Approaches to Atypical Development and Developmental Psychopathology."What emerges from the work included here is a record of innovative extensions, refinements, and applications of the concept of constructivism.The chapters not only demonstrate the compatibility of constructivism with investigations of atypicality, but also the generation of a constructivist perspective for a wide array of problems in developmental psychology.