ADVANCES IN CHILD DEVELOPMENT AND BEHAVIOR is intended to ease the task faced by researchers, instructors, and students who are confronted by the vast amount of research and theoretical discussion in child development and behavior. The serial provides scholarly technical articles with critical reviews, recent advances in research, and fresh theoretical viewpoints. VOLUME 31 discusses chidren's understanding of photographs as spatial and expressive representations, school relationships and their influence on behavior, literacy and the role of letter names, emotion, morality, and self, working memory in infancy, differentiated sense of the past and the future, cognitive flexibility and language abilities, understanding children with medical and physical disorders, bio-ecological environment and development, and early literacy.