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Auflistung nach Autor:in "Kurzweg, Marco"

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  • Zeitschriftenartikel
    Body Language of Avatars in VR Meetings as Communication Status Cue: Recommendations for Interaction Design and Implementation
    (i-com: Vol. 21, No. 1, 2022) Kurzweg, Marco; Wolf, Katrin
    While traditional videoconferencing causes privacy issues, virtual meetings are not yet widely used. Their communication quality still lacks usability and important non-verbal communication cues, such as body language, are underrepresented. We aim at exploring virtual avatars’ body language and how it can be used to indicate meeting attendees’ communication status. By comparing users’ perceptions of avatar behavior, we found that avatar body language across gender can be an indication of communication willingness. We derive resulting body language design recommendations and recommend using attentively behaving avatars as default body language and to indicate being busy through actions of the avatar, such as drinking, typing, or talking on a phone. These actions indicate that users are temporarily busy with another task, but still are attending the meeting. When users are unavailable, their avatars should not be displayed at all and in cases of longer meeting interruptions, the avatar of a user should leave the virtual meeting room.
  • Konferenzbeitrag
    HapticCollider: Ungrounded Force Feedback for Rigid Collisions during Virtual Tool Use
    (Mensch und Computer 2023 - Tagungsband, 2023) Olaya-Figueroa, Juan F.; Streicher, Ferdinand; Kurzweg, Marco; Willms, Jan; Wolf, Katrin
    Controllers are not merely the dominant interface to interact in virtual reality (VR); they also are the main resource for haptically perceiving the virtual world. As standard VR controllers fail in generating realistic haptic feedback, we designed HapticCollider, a kinetic controller rendering force feedback, e.g., to simulate a collision when hammering against a virtual object. In our user study, we demonstrated that HapticCollider significantly increases realism in tool usage compared with a standard VR controller. As key factors for tool use realism in VR, we identified force feedback, controller weight, and grip shape in combination with software solutions, namely collision prediction, and control-display ratio to render the force timing, as well as, the tool position according to the user's expectations.
  • Konferenzbeitrag
    Increasing Realism of Displayed Vibrating AR Objects through Edge Blurring
    (Mensch und Computer 2023 - Tagungsband, 2023) Kurzweg, Marco; Letter, Maximilian; Wolf, Katrin
    Many standard AR devices, such as the HoloLens2, have limitations in displaying fast motions, like the ones required to visualize moving or vibrating objects. One reason for this is the low computing power compared to other technologies, resulting in frame rate drops. Further, established visualization enhancement methods, such as anti-aliasing, cannot be applied because of their high computational demands. Therefore, we have looked at possible alternatives on the HoloLens2 for displaying vibrations more realistically as long as these technical limitations exist. We have chosen to examine vibrations as they are widely used for different use cases, like creating feedback, communicating the success of interactions, and generating a better scene understanding. In a user study, three different effects were evaluated against a baseline method, which was the representation of a vibration using a sinus function to calculate the displacement of the object. We found that an effect where the edges of the AR object are blurred (continuously with changing intensity) is perceived as significantly more realistic than other effects and the baseline method.
  • Konferenzbeitrag
    Using Body Language of Avatars in VR Meetings as Communication Status Cue
    (Mensch und Computer 2021 - Tagungsband, 2021) Kurzweg, Marco; Reinhardt, Jens; Nabok, Wladimir; Wolf, Katrin
    While traditional videoconferencing causes privacy issues, virtual meetings are not yet widely used. Their communication quality still lacks usability and important non-verbal communication cues, such as body language, are underrepresented. We aim at exploring virtual avatars’ body language and how it can be used to indicate meeting attendees’ communication status. By comparing users’ perceptions of avatar behavior, we found that avatar body language across gender can be an indication of communication willingness. We derive resulting body language design recommendations and recommend using attentively behaving avatars as default body language and to indicate being busy through actions of the avatar, such as drinking, typing, or talking on a phone. These actions indicate that users are temporarily busy with another task, but still are attending the meeting. When users are unavailable, their avatars should not be displayed at all and in cases of longer meeting interruptions, the avatar of a user should leave the virtual meeting room.