Jul 29, 2018 - We tested three chart types common on smartwatches: bar charts, donut ..... For calculating the LOS offset, we removed 23 (4%) out of 480 trials ..... 4.6 Measure ..... study results give first evidence to answer this question.
Glanceable Visualization: Studies of Data Comparison Performance on Smartwatches Tanja Blascheck, Lonni Besançon, Anastasia Bezerianos, Bongshin Lee, Petra Isenberg
To cite this version: Tanja Blascheck, Lonni Besançon, Anastasia Bezerianos, Bongshin Lee, Petra Isenberg. Glanceable Visualization: Studies of Data Comparison Performance on Smartwatches. IEEE Transactions on Visualization and Computer Graphics, Institute of Electrical and Electronics Engineers, 2018.
HAL Id: hal-01851306 https://hal.inria.fr/hal-01851306 Submitted on 29 Jul 2018
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Glanceable Visualization: Studies of Data Comparison Performance on Smartwatches Tanja Blascheck, Lonni Besançon, Anastasia Bezerianos, Bongshin Lee, and Petra Isenberg
Bar Chart
Donut Chart
Radial Bar Chart
7 Data Values
12 Data Values
24 Data Values
One Stimulus on the Watch
Fig. 1. Left: Example images of the stimuli used in the two perception studies. We tested three chart types (Bar, Donut, and Radial) with three data sizes (7, 12, and 24) on a smartwatch. When printed without rescaling the image, the sizes correspond to the size of the stimuli as shown on our smartwatch (28.73 mm × 28.73 mm). Right: One stimulus shown on the smartwatch. Abstract—We present the results of two perception studies to assess how quickly people can perform a simple data comparison task for small-scale visualizations on a smartwatch. The main goal of these studies is to extend our understanding of design constraints for smartwatch visualizations. Previous work has shown that a vast majority of smartwatch interactions last under 5 s. It is still unknown what people can actually perceive from visualizations during such short glances, in particular with such a limited display space of smartwatches. To shed light on this question, we conducted two perception studies that assessed the lower bounds of task time for a simple data comparison task. We tested three chart types common on smartwatches: bar charts, donut charts, and radial bar charts with three different data sizes: 7, 12, and 24 data values. In our first study, we controlled the differences of the two target bars to be compared, while the second study varied the difference randomly. For both studies, we found that participants performed the task on average in
