Videoconference conversations about data often entail screen sharing visualization artifacts, in which nonverbal communication goes largely ignored. Beyond presentation use cases, conversations supported by visualization also arise in collaborative decision making, technical interviews, and tutoring: use cases that benefit from participants being able to see one another as they exchange questions about the data. In this paper, we employ a reciprocal compositing of visualization and interface widgets over the mirrored video of one's conversation partner, suggestive of a pane of glass, in which both parties can simultaneously manipulate composited elements via bimanual gestures. We demonstrate our approach with implementations of several visualization interfaces spanning the aforementioned use cases, and we evaluate our approach in a study (N = 16) comparing it to videoconferencing while using a mouse to interact with a collaborative web application. Our findings suggest that our approach promotes feelings of presence and mutual awareness of analytical intent.

翻译：关于数据的视频会议对话通常涉及共享可视化成果的屏幕，其中非语言交流在很大程度上被忽视。除了演示用例之外，可视化支持的对话还出现在协作决策、技术面试和辅导等场景中：这些用例受益于参与者在交流数据问题时能够看到彼此。在本文中，我们采用了一种互易合成方法，将可视化组件和界面控件叠加在对话伙伴的镜像视频之上，形成类似玻璃窗格的视觉效果，双方可通过双手手势同时操控合成元素。我们通过实现涵盖上述用例的多个可视化界面来演示该方法，并在一项研究（N = 16）中将其与使用鼠标操作协作网络应用的视频会议进行对比评估。研究结果表明，我们的方法能有效提升临场感及对分析意图的相互感知。