My interest in nverbal behavior has remained constant for over 15 years. I think this has been the case because nverbal behavior has proved a very fascinating and challenging topic. Others might suggest that I am just a slow learner. With eugh time in any area, however, one begins to feel that he or she has some special insights to offer to others. About the time that I was struck with that thought, approximately two and a half years ago, I was developing the first version of my sequential functional model of nverbal exchange. It seemed to me that the func- tional model might provide a very useful framework for a book discussing and analyzing nverbal behavior. I did t want (r do I think I had the patience) to write a comprehensive review of research on nverbal behavior. Other works, such as Siegman and Feldstein's (1978) edited Nonverbal Behavior and Commu- nication, and Harper, Wiens, and Matarazzo's (1978) Nonverbal Communication: The State of the Art, have provided excellent reviews of the research on nverbal behavior. Instead, what I have tried to do in this book is to use nverbal behavior as a vehicle for discussing social behavior. In a very real sense, this analysis of nverbal behavior is a means to an end, t an end in itself. A consequence of this approach is that this review is a selective one, unlike the comprehensive works mentioned earlier.