This paper describes a comparison of user experience of virtual reality (VR) image format. The authors prepared the following four conditions and evaluated the user experience during viewing VR images with a headset by measuring subjective and objective indices; Condition 1: monoscopic 180-degree image, Condition 2: stereoscopic 180-degree image, Condition 3: monoscopic 360-degree image, Condition 4: stereoscopic 360-degree image. From the results of the subjective indices (reality, presence, and depth sensation), condition 4 was evaluated highest, and conditions 2 and 3 were evaluated to the same extent. In addition, from the results of the objective indices (eye and head tracking), a tendency to suppress head movement was found in 180-degree images.
In this research, using an electric car as a motion platform we evaluated the user experience of motion representations in a virtual reality (VR) system. The system represents physical motion when it operates the car backward and forward with accompanying visual motion included in stereoscopic images in a head-mounted display (HMD). Image stimuli and car-based motion stimuli were prepared for three kinds of motion patterns, "starting", "stopping" and "landing", as experimental stimuli. In the experiment, pleasure and arousal were measured after each stimulus representation using the Self-Assessment Manikin (SAM), a questionnaire about emotions. Results showed that the car-based motion stimulus increased pleasure in the "landing" pattern.