Composite Line Designs and Accuracy Measurements for Tactile Line Tracing on Touch Surfaces
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Published:2021-11-03
Issue:ISS
Volume:5
Page:1-17
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ISSN:2573-0142
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Container-title:Proceedings of the ACM on Human-Computer Interaction
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language:en
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Short-container-title:Proc. ACM Hum.-Comput. Interact.
Author:
Chau Edwin1,
Yu Jiakun1,
Goncu Cagatay2,
Withana Anusha1
Affiliation:
1. The University of Sydney, Sydney, NSW, Australia
2. Monash University, Melbourne, VIC, Australia
Abstract
Eyes-free operation of mobile devices is critical in situations where the visual channel is either unavailable or attention is needed elsewhere. In such situations, vibrotactile tracing along paths or lines can help users to navigate and identify symbols and shapes without visual information. In this paper, we investigated the applicability of different metrics that can measure the effectiveness of vibrotactile line tracing methods on touch screens. In two user studies, we compare trace Length Error, Area Error, and Fréchet Distance as alternatives to commonly used trace Time. Our results show that a lower Fréchet distance is correlated better with the comprehension of a line trace. Furthermore, we show that distinct feedback methods perform differently with varying geometric features in lines and propose a segmented line design for tactile line tracing studies. We believe the results will inform future designs of eyes-free operation techniques and studies.
Funder
Australian Research Council Discovery Early Career Researcher Award
Publisher
Association for Computing Machinery (ACM)
Subject
Computer Networks and Communications,Human-Computer Interaction,Social Sciences (miscellaneous)
Reference34 articles.
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