Auflistung nach Autor:in "Freiwald, Jann Philipp"
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- KonferenzbeitragConveying perspective in multi-user virtual reality collaborations(Mensch und Computer 2020 - Tagungsband, 2020) Freiwald, Jann Philipp; Diedrichsen, Lennart; Baur, Alexander; Manka, Oliver; Jorshery, Pedram Berendjy; Steinicke, FrankEffectively conveying the users' visual point of view in a collaborative virtual reality environment is a crucial factor in successful and efficient cooperation. Visual indicators of users' perspectives can reduce the required verbal communication and therefore increase the efficiency of work within remote teams. In this paper we compare three distinct types of visual indicators regarding task completion time, precision and error rate. These perspective conveying methods include a 3D cone indicating the boundaries of a user's field of view, highlighting the object a user is looking at, and displaying a direct video mirror of the user's view port. In an experiment these methods were used to transmit information from one person to another, that would otherwise be inaccessible. In a virtual warehouse scenario, participants moved visually obstructed boxes to a target area with a crane, while an experiment conductor provided visual cues as to where these boxes are, solely by looking at them. The results indicate that object highlighting is significantly inferior regarding precision and error rate, while the video mirror proved to be the most reliable. The view cone was however perceived as the method with the highest degree of social presence.
- KonferenzbeitragThe cybersickness susceptibility questionnaire: predicting virtual reality tolerance(Mensch und Computer 2020 - Tagungsband, 2020) Freiwald, Jann Philipp; Göbel, Yvonne; Mostajeran, Fariba; Steinicke, FrankIn this paper we propose the Cybersickness Susceptibility Questionnaire (CSSQ), which predicts the likeliness of a user experiencing cybersickness related symptoms when exposed to virtual reality (VR). The items on this questionnaire were compiled from several previous works that have demonstrated the influence of various biological, chemical and psychological factors on the human senses and nervous system. A pilot study with 24 participants showed a correlation between CSSQ items and the perceived cybersickness during and after a virtual roller coaster ride. A high mean value in the CSSQ indicates a stronger perception of cybersickness during and after the exposure to VR.
- KonferenzbeitragEffects of Avatar Appearance and Locomotion on Co-Presence in Virtual Reality Collaborations(Mensch und Computer 2021 - Tagungsband, 2021) Freiwald, Jann Philipp; Schenke, Julius; Lehmann-Willenbrock, Nale; Steinicke, FrankIn this paper we share the results of a user study designed to investigate the impact of locomotion techniques and avatar appearances in multi-user virtual reality (VR) settings. In our study we compared continuous joystick-based and non-continuous teleportation-based locomotion with regards to the observer’s perceived co-presence, cybersickness, fairness and enjoyment in a competitive game environment. Likewise, we compared the effects of humanoid and abstract avatar appearances. The results revealed significant effects of the locomotion type on perceived co-presence and subjective fairness, such that continuous locomotion yielded significantly higher perceived co-presence and fairness. However, there were no significant differences between the avatar appearances except for a weak positive effect of realistic avatars on mutual awareness. These findings suggest that a greater emphasis should be put on the visual representation of teleportation-based navigation in multi-user VR, for instance, by animating positional transitions. They further suggest that a distinction for the effect of avatar appearance has to be made based on the context of the multi-user VR application. While previous work showed a positive effect of realistic avatars on co-presence during cooperative tasks, we found no such effect in a competitive setting.