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Auflistung nach Schlagwort "notifications"

1 - 4 von 4
  • Konferenzbeitrag
    Effective Visualization of Time-Critical Notifications in Virtual Reality
    (Mensch und Computer 2018 - Tagungsband, 2018) Gruenefeld, Uwe; Harre, Marie-Christin; Stratmann, Tim Claudius; Lüdtke, Andreas; Heuten, Wilko
    Virtual Reality (VR) devices empower users to be fully immersed into a virtual environment. However, time-critical notifications must be perceived as quickly and correctly as possible. Especially, if they indicate risk of injury (e.g., bumping into walls). Compared to displays used in previous work to investigate fast response times, immersion into a virtual environment, wider field of view and use of near-eye displays observed through lenses may have a considerable impact on the perception of time-critical notifications. Therefore, we studied the effectiveness of different visualization types (color, shape, size, text, number) in two different setups (room-scale, standing-only) with 20 participants in VR. Out study consisted of a part were we tested one notification and a part with multiple notifications showing up at the same time. We measured reaction time, correctness and subjective user evaluation. Our results showed that visualization types can be organized by consistent effectiveness ranking for different numbers of notification elements presented. Further, we offer promising recommendations regarding which visualization type to use in future VR applications for showing time-critical notifications.
  • Zeitschriftenartikel
    Evaluation of Priority-Dependent Notifications for Smart Glasses Based on Peripheral Visual Cues
    (i-com: Vol. 21, No. 2, 2022) Faulhaber, Anja K.; Hoppe, Moritz; Schmidt, Ludger
    Smart glasses are increasingly commercialized and may replace or at least complement smartphones someday. Common smartphone features, such as notifications, should then also be available for smart glasses. However, notifications are of disruptive character given that even unimportant notifications frequently interrupt users performing a primary task. This often leads to distractions and performance degradation. Thus, we propose a concept for displaying notifications in the peripheral field of view of smart glasses and with different visualizations depending on the priority of the notification. We developed three icon-based notifications representing increasing priority: a transparent green icon continuously becoming more opaque (low priority), a yellow icon moving up and down (medium priority), and a red and yellow flashing icon (high priority). To evaluate the concept, we conducted a study with 24 participants who performed a primary task and should react to notifications at the same time using the Nreal Light smart glasses. The results showed that reaction times for the low-priority notification were significantly higher and it was ranked as the least distracting. The medium- and high-priority notifications did not show a clear difference in noticeability, distraction, or workload. We discuss implications of our results for the perception and visualization of notifications in the peripheral field of view of smart glasses and, more generally, for augmented reality applications.
  • Konferenzbeitrag
    NotiModes: an investigation of notification delay modes and their effects on smartphone users
    (Mensch und Computer 2020 - Tagungsband, 2020) Poguntke, Romina; Schneegass, Christina; Vekens, Lucas Van der; Rzayev, Rufat; Auda, Jonas; Schneegass, Stefan; Schmidt, Albrecht
    Despite the extensive analysis of the consequences of interruptions caused by smartphone notifications, research on the effects on users has so far been sparse. Therefore, in this work we (1) explore concepts on preventing interruptions elicited by notification delay in a focus group; (2) implement a smartphone application manipulating the notification delay in three distinct ways varying in the degree of user-control; (3) evaluate all three concepts with 13 users in a four-week field trial. We thereby gather qualitative feedback in 52 semi-structured interviews, one per participant after each mode and an additional control week. The results show that through the intensive preoccupation with their notification management, users reflect critically about advantages and disadvantages of their continuous reachability. Based on the results from the focus group and field trial, we derive four design implications summarizing the users’ experiences and suggestions on notification delay mechanisms.
  • Konferenzbeitrag
    Tight Times: Semantics and Distractibility of Pneumatic Compression Feedback for Wearable Devices
    (Mensch und Computer 2019 - Tagungsband, 2019) Löffler, Diana; Tscharn, Robert; Schaper, Philipp; Hollenbach, Melissa; Mocke, Viola
    Notifications on wrist worn devices can be delivered visual, auditory or haptic. Haptic notifications are hands and eyes-free and at the same time discrete. As an alternative to vibrotactile notifications we explore the use of compression notifications for a variety of semantic contexts. We present a prototype to deliver squeeze cues and present the results of two empirical studies focusing on context-dependent interpretation and distractibility of squeeze notifications. In the first study, 20 participants rated the desirability and intuitive understanding of squeeze-based notifications in a variety of contexts. In the second study, 39 participants completed a set of cognitive tasks interrupted by squeeze-distractors. Our observations suggest that by using simple squeeze signals it is possible to convey a range of context-dependent information that requires little learning and does not distract users from their main activity. These findings help to further investigate the use of compression notifications as an attention-preserving communication channel.