Parts: 1. Development: Concept and Structure. The Concept of Development (P. van Geert). The Structure of Developmental Theories (P. van Geert). 2. Causes and Conditions of Developmental Change. Learning and Models of Development (M. Atkinson). Developmental Contingency Modelling - A Framework for Discussing the Processes of Change and the Consequence of Deficiency (J. Morton). Theories about the Causes of Cognitive Development (P. Bryant). 3. The Social Dimension of Development. The Conditions of Human Development - Implications of Socialization Research for Developmental Theory (D. Geulen). Development and Social Expectations (P. Vedder). 4. Three Views on the Nature of Developmental Processes. Cognitive Change and Behaviour (F. Orsini-Bouichou and J.-L. Paour). Developmental Sequences - Some Characteristics and an Empirical Demonstration (J. ter Laak). Psychic Development of the Individual - A Process of Structuring and Restructuring Experience (M. Tyszkowa). 5. Rationalism Versus Empiricism in Developmental Theory Building. Children's Theories and Developmental Theory (E. Elbers). Getting Development off the Ground - Modularity and the Infant's Perception of Causality (A. Leslie). On What is Cognitive about Development (B. de Gelder).