Lessons from Pangloss: User Encounters with Uncertainty

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Tools need to better support analysts who work with approximate data.


Pangloss implements "Optimistic Visualization", a method that gives analysts confidence to use approximate results for exploratory data analysis. In this position paper, we outline some ways in which user experiences with an approximate visualization system did not match analysts' intuitions. These observations have implications for the design of future systems that expose uncertainty to users.