arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2008.01169cs.LGcs.AIcs.CY
收藏

基于学习曲线的深度知识追踪

Deep Knowledge Tracing with Learning Curves

East China Normal University(华东师范大学)

Shanghui Yang, Mengxia Zhu, Xuesong Lu

摘要:

知识追踪是近年来计算教育学的一个研究热点。任务是根据学生过去对问题的回答来模拟他们对知识概念的掌握程度,以及预测他们在未来正确回答后续问题的概率。KT任务在历史上使用贝叶斯推理和因子分析等统计建模方法来解决,但深度学习的最新进展导致了利用深度神经网络的连续提议,包括长短期记忆网络,记忆增强网络和自我注意网络。虽然这些深度模型表现出优于传统方法的性能,但它们都忽略了学习曲线理论的显式建模,该理论通常认为,对同一知识概念进行更多的实践可以提高一个人对该概念的掌握水平。基于这一理论,本文提出了一种卷积增强的知识追踪(CAKT)模型。该模型采用三维卷积神经网络来明确学习学生最近在应用与下一个问题中相同的知识概念时的经验,并将学习的特征与使用经典LSTM网络获得的代表其整体潜在知识状态的特征融合。然后,融合的特征被送入第二个LSTM网络,以预测学生对下一个问题的回答。实验结果表明,与现有的模型相比,CAKT在预测学生反应方面取得了新的最先进的性能。我们还进行了广泛的敏感性分析和消融研究,以显示结果的稳定性和证明CAKT的特定架构,分别。

英文摘要:

Knowledge tracing (KT) has recently been an active research area of computational pedagogy. The task is to model students' mastery level of knowledge concepts based on their responses to the questions in the past, as well as predict the probabilities that they correctly answer subsequent questions in the future. KT tasks were historically solved using statistical modeling methods such as Bayesian inference and factor analysis, but recent advances in deep learning have led to the successive proposals that leverage deep neural networks, including long short-term memory networks, memory-augmented networks and self-attention networks. While those deep models demonstrate superior performance over the traditional approaches, they all neglect the explicit modeling of the learning curve theory, which generally says that more practice on the same knowledge concept enhances one's mastery level of the concept. Based on this theory, we propose a Convolution-Augmented Knowledge Tracing (CAKT) model in this paper. The model employs three-dimensional convolutional neural networks to explicitly learn a student's recent experience on applying the same knowledge concept with that in the next question, and fuses the learnt feature with the feature representing her overall latent knowledge state obtained using a classic LSTM network. The fused feature is then fed into a second LSTM network to predict the student's response to the next question. Experimental results show that CAKT achieves the new state-of-the-art performance in predicting students' responses compared with existing models. We also conduct extensive sensitivity analysis and ablation study to show the stability of the results and justify the particular architecture of CAKT, respectively.

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。

↑