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Expanding Targets in Virtual Reality Environments: A Fitts’ Law Study

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PubDate: Aug 2023

Teams: Xi’an Jiaotong-Liverpool University

Writers: Rongkai Shi, Yushi Wei, Yue Li, Lingyun Yu, Hai-Ning Liang

PDF: Expanding Targets in Virtual Reality Environments: A Fitts’ Law Study

Abstract

Target pointing selection is a fundamental task. According to Fitts’ law, users need more time to select targets with smaller sizes. Expanding the target to a larger size is a practical approach that can facilitate pointing selection. It has been well-examined and -deployed in 2D user interfaces. However, limited research has investigated target expansion methods using an immersive virtual reality (VR) head-mounted display (HMD). In this work, we aimed to fill this gap by conducting a user study using ISO 9241-411 multi-directional pointing task to examine the effect of target expansion on target selection performance in VR HMD. Based on our results, we found that compared to not expanding the target, expanding the target width by 1.5 and 2.5 times during the movement can significantly reduce the selection time. We hope that the design and results derived from the study can help frame future work.

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