Paul Ekman & Phoebe Ellsworth 
Emotion in the Human Face [PDF ebook] 
Guidelines for Research and an Integration of Findings

Emotion in the Human Face: Guidelines for Research and an Integration of Findings reviews research findings about the link between the face and emotion and provides some guidelines for study of this complicated but intriguing phenomenon. Some of the conceptual ambiguities that have hindered research and the methodological decisions that must be made in planning research on the face and emotion are discussed. How past investigators handled these matters is presented critically, and a set of standards is offered. This book is comprised of 21 chapters and begins with an overview of questions about how the face provides information about emotion, with emphasis on evidence based on scientific research (largely in psychology). The reader is then introduced to conceptual ambiguities and methodological decisions related to research on the face-emotion connection (including sampling), along with some important research findings. In particular, emotion categories and dimensions that observers can judge on the basis of facial behavior are analyzed, and whether such judgments can be accurate. The similarities and differences in facial behavior across cultures are also considered, along with the relative contribution of facial behavior and contextual information to the judgment of emotion. This monograph is intended primarily for students of psychology, anthropology, ethology, sociology, and biology, as well as those planning or already conducting research on the face.