This is a book about communication behavior: how we conceptualize it, observe it, measure it, and analyze it. The 1970s and 1980s were times when communication behavior was a primary interest of many communication scholars. The aim of this book is to reignite some interest in and passion about how human communication behavior should be studied. It presents the best advice, techniques, cautions, and controversies from the 1970s and 1980s and then updates them. Several chapters also introduce statistical methods and procedures to allow readers to analyze behavioral data. This book is a useful resource for communication scholars and graduate students to guide their study of communication behavior.