This paper reports on the emergent use of lightweight text chat to provide important grounding and facilitation information in a large, distributed, ad-hoc group of researchers participating in a live experiment. The success of chat in this setting suggests a critical re-examination and extension of Clark and Brennan's work on grounding in communication. Specifically, it is argued that there are some settings characterized by reduced information and clarification needs, where the use of extremely lightweight tools (such as basic text chat) can be sufficient for achieving common ground ? even when conversational participants are unknown to each other. Theoretical and design implications are then presented. ACM Classification H5.3. Information interfaces and presentation (e.g., HCI): Group and Organization Interfaces Keywords Collaboratories, common ground, cyberinfrastructure, cyberscience, chat, instant messaging, distributed groups.
Jeremy P. Birnholtz, Thomas A. Finholt, Daniel B.