document: Visualization support for a user-centered KDD process Viewing knowledge discovery as a user-centered process that requires an effective collaboration between the user and the discovery system , our work aims to support an active role of the user in that process by developing synergistic visualization tools integrated in our discovery system D2MS . These tools provide an ability of visualizing the entire process of knowledge discovery in order to help the user with data preprocessing , selecting mining algorithms and parameters , evaluating and comparing discovered models , and taking control of the whole discover process . Our case-studies with two medical datasets on meningitis and stomach cancer show that , with visualization tools in D2MS , the user gains better insight in each step of the knowledge discovery process as well the relationship between data and discovered knowledge .
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