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CHI
2009
ACM

Sizing the horizon: the effects of chart size and layering on the graphical perception of time series visualizations

10 years 4 months ago
Sizing the horizon: the effects of chart size and layering on the graphical perception of time series visualizations
We investigate techniques for visualizing time series data and evaluate their effect in value comparison tasks. We compare line charts with horizon graphs--a space-efficient time series visualization technique--across a range of chart sizes, measuring the speed and accuracy of subjects' estimates of value differences between charts. We identify transition points at which reducing the chart height results in significantly differing drops in estimation accuracy across the compared chart types, and we find optimal positions in the speed-accuracy tradeoff curve at which viewers performed quickly without attendant drops in accuracy. Based on these results, we propose approaches for increasing data density that optimize graphical perception. Author Keywords Visualization, graphical perception, time series, line charts, horizon graphs. ACM Classification Keywords H.5.2. Information Interfaces: User Interfaces.
Jeffrey Heer, Nicholas Kong, Maneesh Agrawala
Added 24 Nov 2009
Updated 24 Nov 2009
Type Conference
Year 2009
Where CHI
Authors Jeffrey Heer, Nicholas Kong, Maneesh Agrawala
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