Research on supporting life-sized remote-video cooperative work where users can freely move around without distinguishing local from remote

在不区分本地和远程的真实大小的远程视频协作工作环境中，我们通过运行三个实验验证了本地和远程用户可以相互参考对方活动的对称性的重要性。在第一个实验中，我们给出了以对话为中心的任务，在这个任务中，本地和远程受试者的座位位置是固定的，没有物理对象可以共享。由于真人大小的图像显示在LCD面板上，用户的身体和面部都面向LCD面板，我们观察到用户有积极的互动。在第二个实验中，我们进行了一个实验，远程用户在中心桌子周围自由移动，并在中心桌子上共享一个工作空间。在那里，我们研究了远距离合作者的上半身在需要身体运动的团队工作中是否有价值。有上半身图像和没有上半身图像的对比研究表明，有上半身图像的小组工作效率更高。我们推断，由于相似性的提高，上半身图像帮助他们预测和支持远方合作者的后续动作。在第三个实验中，为了缓解远程手势经常被遮挡、横切和从人们的注意力中滑落的不可见性问题，我们提出了一种技术，“远程滞后”，旨在减轻不可见性问题。这项技术为人们提供了远程手势的即时回放，以从不可见或错过的协调环境中恢复过来。为了检验所提出的技术对对称特性的影响，我们研究了四人小组参与两个指导任务，使用有和没有远程滞后的物理对象。我们的研究结果表明，远程滞后可以有效缓解协作过程中的不可见性问题，从而减少协作过程中的问题/确认和冗余指令。虽然这项技术似乎增加了帮助者的体力劳动，但它减少了帮助者在执行任务时的总体努力，并减轻了合作者双方的时间需求。少

In the environment for life-sized remote-video cooperative work without distinguishing local from remote, we have verified the importance of symmetry that local and remote users can refer to each other's activity by running three experiments. In the first experiment, we gave the conversation communication-centered task in which the seat positions of local and remote subjects are fixed and there are no physical objects to be shared. Since the images at life size are displayed on LCD panels, the bodies and faces of users are oriented to the LCD panels and we observed that users had active interaction. In the second experiment, We conducted an experiment in which distant users free move around a center table and share a work space on the center table. There, we examined whether showing the upper body of distant collaborators is valuable for group work that requires body movement during their work. A comparative study with and without upper body images indicated that group work were more e … More fficient when upper body images were shown. We infer that upper body images helped them predict and brace for distant collaborator's subsequent movement due to improved similarity. In the third experiment, To alleviate the problem of invisibility that remote gestures often get occluded, transected, and slipped out of one's attention, we proposed a technique, "remote lag," that aims to mitigate the invisibility problems. The technique provides people with an instant playback of the remote gestures to recover from the invisible or missed context of coordination. To examine the effects of the proposed technique to the symmetry property, we studied four-person groups engaging in two mentoring tasks using physical objects with and without remote lags. Our results show that remote lags are effective in alleviating the invisibility problems, resulting in fewer questions/confirmations and redundant instructions during collaboration. Although the technique seems to increase a helper's physical effort, it decreases the helper's overall effort in performing the tasks and alleviates both collaborators' temporal demands. Less