arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1806.08065cs.LGcs.AIstat.ML
收藏

利用神经网络学习认知模型

Learning Cognitive Models using Neural Networks

Carnegie Mellon University(卡内基梅隆大学)

Devendra Singh Chaplot, Christopher MacLellan, Ruslan Salakhutdinov, Kenneth Koedinger

摘要:

人类学习的认知模型提供了关于学习者必须获得的技能的信息,以在任务领域中准确地执行。学习的认知模型不仅具有科学意义,而且在自适应在线教学系统中也很有价值。一个更准确的模型通过更好的教学决策产生更有效的辅导。先前的自动认知模型发现方法通常集中在结构良好的领域,依赖于学生的成绩数据或涉及大量的人类知识工程。在本文中,我们提出了认知表示学习器(CogRL),这是一个新的框架,可以在没有数据和很少或没有人类知识工程的结构不良的领域中学习准确的认知模型。我们的贡献是双重的:首先,我们证明了使用CogRL学习的表征可以用于精确的自动认知模型发现,而无需使用几个结构不良的领域中的任何学生表现数据:Rumble Blocks,汉字和文章选择。这在准确的人类创作的认知模型不可用或创作认知模型困难的领域中特别有效和有用。其次,对于认知模型可用的领域,我们表明,通过CogRL学习的表示可以用来获得准确的估计技能难度和学习率参数,而不使用任何学生的表现数据。这些估计值与使用文章选择数据集上的学生表现数据的估计值高度相关。

英文摘要:

A cognitive model of human learning provides information about skills a learner must acquire to perform accurately in a task domain. Cognitive models of learning are not only of scientific interest, but are also valuable in adaptive online tutoring systems. A more accurate model yields more effective tutoring through better instructional decisions. Prior methods of automated cognitive model discovery have typically focused on well-structured domains, relied on student performance data or involved substantial human knowledge engineering. In this paper, we propose Cognitive Representation Learner (CogRL), a novel framework to learn accurate cognitive models in ill-structured domains with no data and little to no human knowledge engineering. Our contribution is two-fold: firstly, we show that representations learnt using CogRL can be used for accurate automatic cognitive model discovery without using any student performance data in several ill-structured domains: Rumble Blocks, Chinese Character, and Article Selection. This is especially effective and useful in domains where an accurate human-authored cognitive model is unavailable or authoring a cognitive model is difficult. Secondly, for domains where a cognitive model is available, we show that representations learned through CogRL can be used to get accurate estimates of skill difficulty and learning rate parameters without using any student performance data. These estimates are shown to highly correlate with estimates using student performance data on an Article Selection dataset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑