In order to assess the effectiveness of information visualizations for data analysis we need a sound understanding of how human's perceptual and cognitive capabilities are influenced by a particular representation design. In this talk I will present results from three recent perceptual experiments for information visualization design. These experiments assessed the representation of directed edges in graphs (PacificVis 2011), different methods for designing dual-scale data charts (InfoVis 2011), and perceptual implications of reading data on large wall displays (work in progress). I will present the results of each study and talk in general about the design of perceptual user studies, alternative approaches, and tradeoffs in experimental design.
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