Newtons Pen II: an intelligent, sketch-based tutoring system and its sketch processing techniques
Newtons Pen II: an intelligent, sketch-based tutoring system and its sketch processing techniques
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牛顿笔II：智能素描辅导系统及其素描处理技术
DOI：
10.2312/sbm/sbm12/057-065
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发表时间：
2012
影响因子：
5.5
通讯作者：
James Herold
中科院分区：
文献类型：
--
作者：
Chia;Josiah Jordan;T. Stahovich;James Herold
我们提出了一个基于笔的智能教学系统（ITS）的本科静力学支架学生在自由体图和平衡方程的建设。大多数现有的ITS依赖于传统的WIMP（窗口，图标，菜单，指针）界面，这往往需要学生从一组预定义的选择中选择正确的答案。相比之下，我们的系统引导学生从头开始构建解决方案，反映了他们通常解决问题的方式，最近的研究表明，这对有效的教学很重要。我们的系统采用了几种新技术的草图理解，包括一个简单的实现笔划合并技术，笔划聚类技术，和一种技术，使用隐马尔可夫模型来纠正方程中的解释错误。我们的辅导系统被部署在我们大学的本科生静力学课程。态度调查表明，辅导系统优于传统的WIMP为基础的系统，是一个有效的教育工具。
We present a pen-based intelligent tutoring system (ITS) for undergraduate Statics which scaffolds students in the construction of free body diagrams and equilibrium equations. Most existing ITSs rely on traditional WIMP (Windows, Icons, Menus, Pointers) interfaces, which often require the student to select the correct answer from among a set of predefined choices. Our system, by contrast, guides students in constructing solutions from scratch, mirroring the way they ordinarily solve problems, which recent research suggests is important for effective instruction. Our system employs several new techniques for sketch understanding, including a simple-to-implement stroke merging technique, a stroke clustering technique, and a technique that uses a Hidden Markov Model to correct interpretation errors in equations. Our tutoring system was deployed in an undergraduate Statics course at our university. Attitudinal surveys indicate that the tutoring system is preferable to traditional WIMP-based systems and is an effective educational tool.