This paper tries to bring out the importance of cognition in Information Visualization. It talks about DCog framework developed by Hutchins which "proposes that human knowledge and cognition are not confined to the individual. Instead, it is distributed by placing memories, facts, or knowledge on the objects, individuals, and tools in our environment." It goes around the history and talks about how long it took for new fields to establish their theories and how long it took for us to grasp the important things to focus on. It stresses that Cognition should not be treated as separate field and it argues that DCog framework is very useful for InfoViz development. The author's point that InfoViz is all about perception and cognition makes great sense, I believe Info Viz should be built around Cognitive Science.
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