Evaluation of Callout Design for Ultra-small Touch Screen Devices
Late-Breaking Works: Novel Interactions
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Ishii, Akira
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Shizuki, Buntarou
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Tanaka, Jiro
Extended Abstracts of the ACM CHI'16 Conference on Human Factors in
Computing Systems
2016-05-07
v.2
p.2511-2518
© Copyright 2016 ACM
Summary: Ultra-small touch screen devices tend to suffer from occlusion or the fat
finger problem owing to their limited input area. Callout design, a design
principle that involves the placement of a callout in a non-occluded area in
order to display the occluded area, could eliminate occlusion. However, callout
designs for ultra-small touch screen devices have not yet been explored. In
this study, we conducted an experiment to examine eight callout designs for
ultra-small touch screen devices. The results show that the selection speed was
higher when the content of the callout was changed continuously, the error rate
decreased when a pointer was displayed to indicate the touched position within
the callout, and the workload decreased when the content was changed
continuously. Further, the score that subjectively evaluates the performance
decreased when the position of the callout was fixed.