An e-Learning Support System for Analyzing the Learners' State of Understanding by Using the Statistical Analysis Method

数位学习的缺点之一是教师难以掌握学习者的理解状态（u-state），因为很少有面对面的交流。针对这些趋势，我们的目标是开发一个e-Learning支持系统，在该系统中，教师可以真实的掌握学习者的u-状态，以便他们能够给学习者适当的反馈。通过两年的研究，我们开发了一种用于评估学生u-状态的统计分析方法。我们亦利用统计分析方法，开发出一个能有效支援数位学习的通用系统，并对该系统进行测试，验证其可用性、实用性及有效性，详情如下。(1)我们开发了利用知识的排序关系来评估学习者U状态的统计分析方法。(2)开发了知识序关系分析系统、知识序关系测试系统和知识序关系绘制系统。我们已经在Linux机器上实现了这些系统，并进行了实验，以评估系统。结果表明，学习者难以理解的知识项可以通过直观地分析关系结构来掌握。(3)我们已经评估了使用我们在Linux服务器上实现的每个系统的电子学习支持系统的可用性，有用性和有效性。(4)从评价实验中观察到，一组学习者的u-状态与另一组不同专业的学习者的u-状态之间存在统计学显著性差异。由于教材和学习者专业之间的关系似乎是观察的原因，因此正在进行进一步的调查，以发现这种关系如何影响学习者的U状态。

One of the drawbacks of e-Learning is the fact that it is difficult for the teachers to grasp the learners' state of understanding (u-state) because there is little face-to-face communication. For these trends, we aim to develop an e-Learning support system in which teachers can grasp the learners' u-state in real time so that they can give appropriate feedback to the learners.Through the research in 2 years, we have developed a statistical analysis method for assessing the u-state of the students. We have also developed a general system for effectively and efficiently supporting e-Learning using the statistical analysis method.And we have tested the system, and verified the usability, usefulness, and effectiveness of it. The details are as shown below.(1) We have developed the statistical analysis method for assessing the learners' u-state using the ordering relations of knowledge.(2) We have developed the system to analyze the ordering relations of knowledge, the testing system, and the system to draw the ordering relations of knowledge. We have implemented those systems on a Linux machine, and conducted experiments for evaluating the systems. As the result, we have verified that the knowledge items that are difficult for the learners to understand can be grasped by visually analyzing the relation structure.(3) We have evaluated the usability, usefulness, and effectiveness of the e-learning supporting system using each system we implemented on a Linux server.(4) It has been observed from the evaluation experiments that there was a statistical significance between the u-state of a group of learners and that of another group of learners with a different specialty. Since the relation between the teaching materials and the specialty of the learners seems to be the cause of the observation, further investigation is being conducted to find how this relation affects the learners' u-state.