Book excerpt: Originally published in 1992, this title came out of a conference on emotion and cognition as antecedents and consequences of health and disease processes in children and adolescents. The theoretical rationale for the conference was based on the assumption that the development of emotion, cognition, health and illness are processes that influence each other through the lifespan and that these reciprocal interactions begin in infancy. The chapters discuss developmental theories, research and implications for interventions as they relate to promoting health, preventing disease, and treating illness in children and adolescents.