Issues in Affect Development.- On Emotion and Its A Working Paper.- Facial Expression and Affect Development.- Hearts and A Study in the Measurement of Emotion.- Emotional Expression in I. Initial Studies of Social Signaling and an Emergent Model.- The Emergence of Fear on the Visual Cliff.- Affect Development and Cognition in a Piagetian Context.- Self-Knowledge and Emotional Development.- Toward a Theory of Empathic Arousal and Development.- The Nature of Complex, Unlearned Responses.- Affective Maturation and the Mother-Infant Relationship.- A Clinician's View of Affect Development in Infancy.- An Organizational View of Illustration from the Study of Down's Syndrome Infants.- Emotional Expression in II. Early Deviations in Down's Syndrome.- Cognitive and Communicative Features of Emotional Experience, or Do You Show What You Think You Feel?.- Prior State, Transition Reactions, and the Expression of Emotion.- On the Ontogenesis of Emotions and Emotion-Cognition Relationships in Infancy.