The Concept of Self: an Operational Definition.- Steps Toward a Model of the Self.- Sensorimotor Egocentrism, Social Interaction, and the Development of Self and Gesture.- The Self and Cognition: the Roles of the Self in the Acquisition of Knowledge, and the Role of Cognition in the Development of the Self.- The Cognitive-Developmental Theory of Adolescent Self and Identity.- A Neo-Piagetian Approach to Object Relations.- Towards a Vygotskian Theory of the Self.- Language, Thought, and Self in Vygotsky’s Developmental Theory.- Contributors.- Name Index.