基于覆盖模型的适应性超媒体系统用户建模

USER MODELLING FOR ADAPTIVE HYPERMEDIA SYSTEMS BASED ON OVERLAY MODEL

在适应性超媒体系统中,用户模型的建立是实现系统适应性的前提。提出的适应性学习系统,参考多种用户信息,包括用户的知识状态、认知风格,并根据用户与系统的交互行为,动态更新用户模型。作为智能型教学系统,可以帮助教师实施基于网络的课程,推荐给学生恰当的学习材料,从而提高学生的学习成绩。通过实验评估本系统的功能,对比在三种不同的网上学习环境中学生的学习效果,统计分析显示,适应性学习材料以及适应性呈现风格对于提高学生的学习成绩和学习效率是很有帮助的。

To build the user model is a prerequisite of realizing system adaptivity in Adaptive Hypermedia system. In this paper, we propose an adaptive learning system, and it takes muhiple sources of personalization information into consideration including individual knowledge state and cognitive styles. According to user＇s interaction with system, the system updates user model dynamically. As an intellectual tutoring system, it can assist teachers to develop web-based courses and to recommend students with appropriate subject materials to improve their learning outcomes. In order to accurately evaluate the functions of our system, an experiment was conducted to compare the learning effects of the students in three different web-based learning environments. The statistical analysis results showed that to provide students with adaptive subject materials and adaptive presentation style are very helpful to them in improving their learning achievements and efficiency.