This invention provides user interfaces that more intuitively displayphysiological data obtained from physiological monitoring of one or moresubjects. Specifically, the user interfaces of this invention create anddisplay one or more avatars having behaviors guided by physiologicalmonitoring data. The monitoring data is preferably obtained when the subjectis performing normal tasks without substantial restraint. This inventionprovides a range of implementations that accommodate user having varyingprocessing and graphics capabilities, e.g., from handheld electronic devicesto ordinary PC-type computers and to systems with enhanced graphicscapabilities.