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Published on Feb 4, 2011
CommentSpace is a system for collaborative visual analysis in which analysts comment on visualizations and websites and then use tags and links to organize findings and identify others' contributions. In a series of studies comparing CommentSpace to a system without support for tags and links, we find that a small, fixed vocabulary of tags (question, hypothesis, to-do) and links (evidence-for, evidence-against) helps analysts more reliably locate evidence and establish common ground.