Information visualization leverages the human visual system to support the process of
sensemaking, in which information is collected, organized, and analyzed to generate
knowledge and inform action. Though most research to date assumes a single-user focus on
perceptual and cognitive processes, in practice, sensemaking is often a social process
involving parallelization of effort, discussion, and consensus building. This suggests that to
fully support sensemaking, interactive visualization should also support social interaction …