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arXiv 2407.02547cs.AIcs.LG
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通过概念聚合与基于关系的注意力实现领域泛化的知识追踪

Domain Generalizable Knowledge Tracing via Concept Aggregation and Relation-Based Attention

Yuquan Xie, Shengtao Peng, Wanqi Yang, Ming Yang, Yang Gao

AI总结:

本文针对新教育系统数据稀缺导致知识追踪性能下降的问题,提出领域泛化框架DGKT,通过概念聚合、SeqIN归一化和DGRKT模型缓解跨领域差异,在五个基准数据集上验证了其有效性。

摘要:

知识追踪(KT)是在线教育系统中的一项关键任务,旨在监测学生在整个学习期间的知识状态。常见的知识追踪方法涉及根据学生的练习历史预测其正确回答下一道题目的概率。然而,当面对新教育系统中学生交互数据稀缺的情况时,这些方法往往会出现性能下降。为了解决这一问题,我们利用现有教育系统中的学生交互来缓解因训练数据有限而导致的性能下降。然而,这些交互由于来自不同的教育系统而表现出显著差异。为解决该问题,我们提出了一种面向知识追踪的领域泛化方法,其中现有教育系统被视为源领域,而数据有限的新教育系统被视为目标领域。此外,我们设计了一个可应用于任何知识追踪模型的领域泛化知识追踪框架(DGKT)。具体而言,我们提出了一种概念聚合方法,旨在减少来自不同领域的学生交互序列内部的概念差异。为了进一步缓解领域差异,我们引入了一个新颖的归一化模块,称为序列实例归一化(SeqIN)。此外,为了充分利用练习信息,我们提出了一种专为领域泛化知识追踪任务定制的新型知识追踪模型,名为领域泛化基于关系的知识追踪(DGRKT)。在五个基准数据集上进行的大量实验表明,尽管训练数据有限,所提方法仍表现良好。

英文摘要:

Knowledge Tracing (KT) is a critical task in online education systems, aiming to monitor students' knowledge states throughout a learning period. Common KT approaches involve predicting the probability of a student correctly answering the next question based on their exercise history. However, these methods often suffer from performance degradation when faced with the scarcity of student interactions in new education systems. To address this, we leverage student interactions from existing education systems to mitigate performance degradation caused by limited training data. Nevertheless, these interactions exhibit significant differences since they are derived from different education systems. To address this issue, we propose a domain generalization approach for knowledge tracing, where existing education systems are considered source domains, and new education systems with limited data are considered target domains. Additionally, we design a domain-generalizable knowledge tracing framework (DGKT) that can be applied to any KT model. Specifically, we present a concept aggregation approach designed to reduce conceptual disparities within sequences of student interactions from diverse domains. To further mitigate domain discrepancies, we introduce a novel normalization module called Sequence Instance Normalization (SeqIN). Moreover, to fully leverage exercise information, we propose a new knowledge tracing model tailored for the domain generalization KT task, named Domain-Generalizable Relation-based Knowledge Tracing (DGRKT). Extensive experiments across five benchmark datasets demonstrate that the proposed method performs well despite limited training data.

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。

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