The quality of scientific oral presentations is often poor, owing to a number of factors, including public speaking anxiety. We present DynamicDuo, a system that uses an automated, life-sized, animated agent to help inexperienced scientists deliver their presentations in front of an audience. The design of the system was informed by an analysis of TED talks given by pairs of human presenters to identify the most common dual-presentation formats and transition behaviors used. We explore the usability and acceptability of DynamicDuo in both controlled laboratory-based studies and real-world environments, and its ability to decrease public speaking anxiety and improve presentation quality. In a within-subjects study (N = 12) comparing co-presenting with DynamicDuo against solo-presenting with conventional presentation software, we demonstrated that our system led to significant improvements in public speaking anxiety and speaking confidence for non-native English speakers. Judges who viewed videotapes of these presentations rated those with DynamicDuo significantly higher on speech quality and overall presentation quality for all presenters. We also explore the affordances of the virtual co-presenter through empirical evaluation of novel roles the agent can play in scientific presentations and novel ways it can interact with the speaker in front of the audience.

由于许多因素，包括公众演讲焦虑，科学的口头陈述的质量通常很差。我们介绍了DynamicDuo，该系统使用自动化的，与实物大小一样的动画代理，以帮助没有经验的科学家在观众面前进行演示。系统设计是通过对成对的演示者进行的TED演讲分析而得出的，以识别最常见的双重演示格式和所使用的过渡行为。我们探讨了DynamicDuo在基于实验室的受控研究和现实环境中的可用性和可接受性，以及其减少公众演讲焦虑和提高演示质量的能力。在一项主题内研究（N = 12）中，将使用DynamicDuo进行的共同演示与使用传统演示软件进行的单独演示进行了比较，我们证明了我们的系统极大地改善了非英语母语人士的公共演讲焦虑和说话信心。观看过这些演示文稿的录像带的法官对DynamicDuo的评价在所有演示者的语音质量和总体演示质量上都高得多。我们还通过对代理可以在科学演示中扮演的新颖角色以及它可以与观众面前的演讲者互动的新颖方式进行实证评估，来探索虚拟共同演示者的能力。