Peter Andersen, Ph.D, is a tenured professor in the School of Communication at San Diego State University. He has authored hundreds of book chapters, research papers, and journal articles related to body language and non-verbal communication. Dr. Andersen is the author of The Handbook of Communication and Emotion (with L. Guerrero), Nonverbal Communication: Forms and Functions, and Close Encounters: Communicating in Relationships (with L. Guerrero and W. Afifi).