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Bimodal Communication over Webcasts: From CSCL to CALL

机译：通过网络广播进行双峰通信：从CSCL到CALL

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摘要

The empirical study reported in this article is based on a pilot experiment conducted in a foundation course in Computer Science at the University of Toronto (Canada) with a webcasting system called ePresence; a system that builds upon a webcasting infrastructure through the addition of interactive slides, application sharing, and communication tools in order to enhance students' engagement during on-line webcasts. While watching on-line lectures, learners were given both an audio and a text channel to communicate within their study groups. The results of the pilot study indicated that students could engage in coherent threaded conversations using both modes simultaneously. While evaluating the impact of audio communication on student engagement during on-line lectures, we observed the phenomenon of bimodal conversations or medium switching. Mode selection and mode switching are seen to impact conversations at various levels, and yet students are able to intuitively negotiate both modes simultaneously during on-line conversations. Based on these findings, we are now interested in integrating real-time technologies such as chat, audio conferencing systems using Voice over IP in language teaching environments. The goal of these future investigations is a) to monitor impact of the mode/medium switch on the academic progress of SLA and b) to determine if choice of medium/mode of communication represents linguistic choices: choices made because of the characteristics of the particular context in which the conversation takes place (Murray, 1988).
机译：本文报道的实证研究基于在多伦多大学（加拿大）计算机科学基础课程中进行的试点实验，该实验使用名为ePresence的网络广播系统进行；该系统通过添加交互式幻灯片，应用程序共享和通讯工具来构建基于网络广播基础结构的系统，以增强学生在在线网络广播期间的参与度。在观看在线讲座时，会为学习者提供音频和文本通道，以在他们的学习小组中进行交流。初步研究结果表明，学生可以同时使用两种模式进行连贯的会话。在评估在线讲座期间音频交流对学生参与的影响时，我们观察到双峰对话或媒介切换的现象。模式选择和模式切换被认为会影响各个级别的对话，但是学生能够在在线对话中同时直观地同时协商两种模式。基于这些发现，我们现在对在语言教学环境中使用IP语音集成实时技术（如聊天，音频会议系统）感兴趣。这些未来研究的目标是：a）监视模式/媒介转换对SLA学术进展的影响，以及b）确定选择传播媒介/传播方式是否代表语言选择：由于特定语言的特征而做出的选择对话发生的环境（Murray，1988年）。

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