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

情境理论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，并被用作知识获取的一种方法。我们试图将一种通过类比来获取知识的方法应用于情境理论。在本研究中，我们根据情境理论形成了类比的说明性标准。然后，我们提出了一种从类比反例中获取未知知识的方法。另一方面，在CAI领域也开展了许多研究活动。特别是近年来，计算机支持的合作学习（CSCL）引起了人们的浓厚兴趣，它是指两个或多个学习者在一个小组中在计算机支持的环境下合作学习某些学科。在合作团队支持系统中，提供学习者之间有效的沟通手段是必不可少的。基于CSCL概念的几种学习支持系统已经被开发出来，但它们都依赖于学习者的静态群体形成。因此，我们不能期望合作学习的原创性效果，即学习者能够适应自然和动态的群体形成，并且能够学习在现实世界中常见的学习者之间的策略。本研究的目标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组成小组，并通过与小组成员以及个人团队系统的自由互动进行学习。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，该模型描述了学习者在真实学习环境中的应急适应行为和群体形成过程。在此基础上，我们尝试设计一个新的合作学习支持系统。

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.