Many XR devices use bare-hand gestures to reduce the need for handheld controllers. Such gestures, however, lead to false positive and false negative recognition errors, which detract from the user experience. While mediation techniques enable users to overcome recognition errors by clarifying their intentions via UI elements, little research has explored how mediation techniques should be designed in XR and how a user's task and context may impact their design preferences. This research presents empirical studies about the impact of user perceived error costs on users' preferences for three mediation technique designs, under different simulated scenarios that were inspired by real-life tasks. Based on a large-scale crowd-sourced survey and an immersive VR-based user study, our results suggest that the varying contexts within each task type can impact users' perceived error costs, leading to different preferred mediation techniques. We further discuss the study implications of these results on future XR interaction design.

翻译：许多XR设备采用裸手手势以减少对手持控制器的依赖。然而，此类手势会导致误报和漏报的识别错误，从而降低用户体验。尽管中介技术通过UI元素帮助用户澄清意图以克服识别错误，但关于如何在XR中设计中介技术、以及用户的任务和情境如何影响其设计偏好的研究仍十分有限。本研究基于受真实任务启发的不同模拟场景，通过实证研究探讨用户感知的错误代价对其在三种中介技术设计方案中偏好的影响。基于大规模众包调查和沉浸式VR用户研究，我们的结果表明，每种任务类型中的不同情境会改变用户的感知错误代价，从而影响其对不同中介技术的偏好。我们进一步讨论了这些结果对未来XR交互设计的研究启示。