Recent years, VR-technologies have been used for teaching motion skills to users. We have studied a VR-assisted system to improve teaching and learning motion skill by using HMD. In this paper, we conducted two experiments as a preliminary procedure of the system. First, we conducted an experiment for visually-induced motion sickness. Subjects are able to perceive HMD views based on an egocentric strategy by removing background objects in virtual environments.In the result of the experiment, we confirmed suppression of visually-induced motion sickness. Next, we conducted the other experiment, i.e., a pose-recognizing experiment for improving spatial perceptual performance. The system enhanced the subject's immersive sensation by changing HMD views in accordance with the subject's head-rotating movements.These experimental results showed a potential of the proposed system as a motion-instructing device. We will develop the system towards continuous motion-instruction as future work.
Abstract:In recent years, virtual reality (VR) technologies have been increasingly used for teaching motion skills to learners. In this paper, the authors employed a VR assistive system for teaching motion skills to learners by the use of an inertial sensor-embedded head-mount-display (HMD). As a step of the development, we studied a motion instruction method using "Head Motion-Associated virtual stereo Rearview (HMAR in short)", and conducted a study on pose-recognition under a time-consuming vision-restricted condition. Under this condition, subjects were to ensure their remembrance only by vision and taking enough time, and not by using proprioception. The time consuming condition is considered to be antithetical to the instantaneous less time consuming condition, and is expected to contribute to deepening the understanding of the effect of the HMAR. In the experiment, reference poses are displayed to learners with the use of a VR system. In the system, the learners observe the virtual stereo rearview via HMD, and perceive and reproduce the displayed reference poses. Here, the virtual stereo camera that is assumed to observe the reference avatar is associated with the learner's head motion. The virtual stereo camera is moved around the reference avatar away from the back of the avatar's head in accordance with the head-rotating motion. As the HMAR was compared with two representative ordinary methods, i.e., a key-switched rearview (KSR) and a mouse-associated rearview (MAR), the elapsed time of the HMAR showed significantly smaller variance, although did not show any significant difference in the mean.
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