An Evaluation of Radar Metaphors for Providing Directional Stimuli Using Non-Verbal Sound

Cassidy, Brendan orcid iconORCID: 0000-0003-0756-9657, Read, Janet C orcid iconORCID: 0000-0002-7138-1643 and MacKenzie, I Scott (2019) An Evaluation of Radar Metaphors for Providing Directional Stimuli Using Non-Verbal Sound. In: CHI '19: Proceedings of the 2019 CHI Conference on Human Factors in Computing Systems. Association for Computing Machinery (ACM), pp. 1-8. ISBN 978-1-4503-5970-2

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Official URL: https://doi.org/10.1145/3290605.3300289

Abstract

We compared four audio-based radar metaphors for providing directional stimuli to users of AR headsets. The metaphors are clock face, compass, white noise, and scale. Each metaphor, or method, signals the movement of a virtual arm in a radar sweep. In a user study, statistically significant differences were observed for accuracy and response time. Beat-based methods (clock face, compass) elicited responses biased to the left of the stimulus location, and non-beat-based methods (white noise, scale) produced responses biased to the right of the stimulus location. The beat methods were more accurate than the non-beat methods. However, the non-beat methods elicited quicker responses. We also discuss how response accuracy varies along the radar sweep between methods. These observations contribute design insights for non-verbal, nonvisual directional prompting.


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