One-handed touchscreen input for legacy applications

Supporting one-handed thumb operation of touchscreen-based mobile devices presents a challenging tradeoff between visual expressivity and ease of interaction. ThumbSpace and Shift--two new application-independent, software-based interaction techniques--address this tradeoff in significantly different ways. ThumbSpace addresses distant objects while Shift addresses small object occlusion. We present two extensive, comparative user studies. The first compares ThumbSpace and Shift to peripheral hardware (directional pad and scrollwheel) and direct touchscreen input for selecting objects while standing and walking. The data favored the Shift design overall, but suggested ThumbSpace is promising for distant objects. Our second study examines the benefits and learnability of combining Shift and ThumbSpace on a device with a larger screen (3.5"). We found their combined use offered users better overall speed and accuracy in hitting small targets (3.6 mm2) than using either method alone.

p1399-karlson.pdf
PDF file

In  Proceedings of CHI 2008

Publisher  Association for Computing Machinery, Inc.
Copyright © 2007 by the Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from Publications Dept, ACM Inc., fax +1 (212) 869-0481, or permissions@acm.org. The definitive version of this paper can be found at ACM’s Digital Library --http://www.acm.org/dl/.

Details

TypeProceedings
Pages1399–1408
ISBN978-1-60558-011-1
> Publications > One-handed touchscreen input for legacy applications