Development of a Discussion Support Model by Situation Theoiy and Application to Computer Supported Corroborative Learning Environments

情境理论中的一个重要问题是如何在情境之间产生约束，即知识获取问题。另一方面，在逻辑领域，类比已经被正式定义并用作知识获取的方法。我们尝试将一种通过类比获得知识的方法应用到情境理论中。本研究从情景理论的角度出发，构建了类比的说明性标准。在此基础上，提出了一种从类比反例中获取未知知识的方法。特别是近年来，计算机支持的合作学习（Computer Supported Cooperative Learning，CSCL），即两个或两个以上的学习者在计算机支持的环境下合作学习某门学科的学习方法，受到了广泛的关注。在合作团队支持系统中，学习者之间提供有效的沟通手段是必不可少的。基于CSCL概念的学习支持系统已经被开发出来，但是它们依赖于学习者的静态组形成。因此，我们不能期望合作学习的原始效果，学习者可以适应自然和动态的群体形成，并可以研究学习者之间的策略，这是常见的真实的世界。本研究的目的是开发一个更强大的合作团队支持系统，使学习者能够动态地形成小组，并通过与小组成员的自由互动以及与他们的个人团队系统进行学习。在本研究中，作为这一目的的第一步，我们提出了一个群体自组织模型，描述了学习者的应急适应行为和群体形成过程中的真实的学习环境。在此基础上，我们尝试设计了一个新的协作学习支持系统。

One of the important issues in the situation theory is how to generate constraints among situations, in other words, knowledge acquisition problem. In the logic field, on the other hand, analogies have been defined formally and used as a method of knowledge acquisition. We try to apply a method of knowledge acquisition through analogies to the situation theory. In this study, we formafee illustrative criterions of analogies in terms of the situation theory. And then, we propose a method of acquiring unknown knowledge from counterexamples of analogies.On the other hand, there have been made many research activities in CAI field. Especially in recent years, strong interests are focused on CSCL(Computer Supported Cooperate Learning) where two or more learners in a group leam about some subjects cooperatively under computer supported environment. In cooperative teaming support systems, it is said to be indispensable to provide effective communication means among learners. Several learning support systems based on CSCL concept have been developed, but they depend on static group formations of learners. Therefore, we cannot expect original effects of cooperative learning, which learners can adapt themselves to natural and dynamic group formations, and can study strategy among learners wfiich are found usually in the real world. The goal of this study is to develop a more powerful cooperative teaming support system which enable learners to form groups dynamically and to leam through free interaction with group members as well as with their personal teaming system. In this study, as the first step for this purpose, we propose a group self-organfeation model that describes emergent-adaptable behavior of learners and group formation processes in the real learning environment. Moreover, we try to design a new cooperative learning support system based on this model.