Anonymity and consensus in computer-supported group decision making

Quantitative and qualitative analyses of data generated in a lab study comparing anonymous and identified computer-supported groups involved in consensus decision-making discussions are presented. It is argued that anonymity removes some tools of persuasion, and increases the difficulty of coordinating discussion. Anonymous groups were found to increase the persuasiveness of their text-based messages, to increase discussion process management behaviors, and to find ways to label each other. No significant effect of anonymity on the number of groups reaching consensus was found. The implications of these results for future research and for practice are discussed.