This reference work provides broad and up-to-date coverage of the major perspectives--ethological, neurobehavioral, developmental, dynamic systems, and componential--on facial expression. The text reviews Darwin's legacy in the context of Izard and Tomkins' new theories as well as Fridlund's recently proposed Behavioural Ecology theory. Other contributions explore continuing controversies on universality and innateness, and update the research guidelines of Ekman, Friesen and Ellsworth. This book anticipates emerging research questions, such as the role of culture in children's understanding...