Comparing Leaning-Based Motion Cueing Interfaces for Virtual Reality Locomotion

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A. Kitson, A. M. Hashemian, E. R. Stepanova, E. Kruijff and B. E. Riecke, "Comparing leaning-based motion cueing interfaces for virtual reality locomotion," 2017 IEEE Symposium on 3D User Interfaces (3DUI), Los Angeles, CA, 2017, pp. 73-82.  doi: 10.1109/3DUI.2017.7893320

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Human computer interaction
Interactive devices
User interfaces
Virtual reality
Oculus Rift DK

In this paper, we describe a user study comparing five different locomotion interfaces for virtual reality locomotion. We compared a standard non-motion cueing interface, Joystick (Xbox), with four motion cueing interfaces, NaviChair (stool with springs), MuvMan (sit/stand active stool), Head-Directed (Oculus Rift DK2), and Swivel Chair (everyday office chair with leaning capability). Each interface had two degrees of freedom to move forward/backward and rotate using velocity (rate) control. The aim of this mixed methods study was to better understand relevant user experience factors and guide the design of future locomotion interfaces. This study employed methods from HCI to provide an understanding of why users behave a certain way while using the interface and to unearth any new issues with the design. Participants were tasked to search for objects in a virtual city while they provided talk-aloud feedback and we logged their behaviour. Subsequently, they completed a post-experimental questionnaire on their experience. We found that the qualitative themes of control, usability, and experience echoed the results of the questionnaire, providing internal validity. The quantitative measures revealed the Joystick to be significantly more comfortable and precise than the motion cueing interfaces. However, the qualitative feedback and interviews showed this was due to the reduced perceived controllability and safety of the motion cueing interfaces. Designers of these interfaces should consider using a backrest if users need to lean backwards and avoid using velocity-control for rotations when using HMDs.

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Natural Sciences and Engineering Research Council (NSERC)