This paper proposes a method that supports knowledge creation in a community by mean of talking virtualized-egos. A virtualized-ego is a conversational agent that represents a community member. Community members can exchange their knowledge by talking with virtualized-egos even when some members are away because the virtualized-egos replay appropriate past messages posted by the absent members. Moreover, messages of virtualized-egos are ordered as a story. A story is a series of comments that reflects relationships between community members. We have developed a system called EgoChat to investigate these ideas and carried out an experiment to ascertain its effectiveness for community knowledge creation.
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