We formulated the sense of the presence of a remote participant in hybrid communication using a Bayesian framework. We also applied the knowledge gained from the simulation with the Bayesian model to the avatar robot's intervention behavior and encouraged the local participants to speak by intervening in the remote participant's behavior using an avatar robot. We then modeled the influence of the avatar robot's behavior on the local participants' statements using an active inference framework that included the presence of a remote participant as a latent variable. Based on the simulation results, we designed the gaze behavior of an avatar robot. Finally, we examined the effectiveness of the designed gaze behavior of the avatar robot. The gaze behavior expressed more of the remote participant's attention and interest in local participants, but local participants expressed fewer opinions in the meeting tasks. The results suggest that gaze behavior increased the presence of the remote participant and discouraged the local participant from speaking in the context of the experimental task. We believe that presence has a sufficiently large influence on whether participants want to express an opinion. It is worth investigating the influence of presence and its control methods using Bayesian models.

翻译：我们采用贝叶斯框架对混合通信中远程参与者的存在感进行了公式化建模。基于贝叶斯模型的仿真结果，我们将相关知识应用于化身机器人的干预行为，通过化身机器人干预远程参与者的行为来鼓励本地参与者发言。随后，我们利用包含远程参与者存在感为潜在变量的主动推理框架，建模了化身机器人行为对本地参与者发言的影响。根据仿真结果，设计了化身机器人的注视行为。最后，我们检验了所设计注视行为的有效性。注视行为虽能更显著地表达远程参与者对本地参与者的关注与兴趣，但在会议任务中本地参与者表达观点的频率反而降低。结果表明，注视行为增强了远程参与者的存在感，但在实验任务背景下抑制了本地参与者的发言意愿。我们认为存在感对参与者是否愿意表达观点具有显著影响，值得运用贝叶斯模型深入研究存在感的影响及其控制方法。