My dissertation research provides tools and techniqies to study computer-supported group work. The work includes data collection (both automated and manual), analysis tools, and display tools. My dissertation examines several key issues. First, what constitutes group data and how can the data be gathered? Next, what type of analyses are appropriate to the data? Lastly, how can this data be represented in a way that allows the researcher to develop insights into the behaviors of collaborative groups? Previous work in the Collaboratory at UNC has examined these issues for a hypertextual single-user system, the Writing Environment. The tools available to a researcher include automatic tracking of user actions, basic statistical analysis tools, an analysis tool based on a cognitive grammar, and display tools to allow the researcher to view the data from various perspectives. Recent research in group work has shown the value of various tools to capture and analyze group work. My dissertation work provides a methodology and an integrated set of tools to study computer-supported groups, neither of which is currently available to researchers. This methodology and set of tools generalize to other working environments and other computer systems. The results of studies done as a demonstration of the tools and methodology also provide new data on computer-supported group interactions. This information will feed back to the design of better systems for computer-supported cooperative work.