Psychologists, educators, animal behaviorists, and other researchers who observe and study sequences of behavior have found Bakeman and Gottman's Observing Interaction helpful in planning their research and analyses. Now its companion volume, Analyzing Interaction, provides the practical underpinning and tools to carry out the sorts of sequential analyses suggested by the earlier book. First, a simple notational scheme for sequential data is introduced (SDIS or Sequential Data Interchange Standard). Then basic sequential statistics are discussed, elaborating and extending the material presented in Observing Interaction. Two computer programs are also included with the book. The SDIS program checks and prepares sequential data for efficient analysis. The GSEQ program tallies sequential data into contingency tables designed by the user and computes a variety of sequential statistics.