连接点:预测学生成绩序列从突发MOOC互动随着时间的推移

Tanmay Sinha, Justine Cassell
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引用次数: 25

摘要

在这项工作中,我们跟踪了学生在edX上多个大规模开放在线课程(MOOCs)上的互动。利用在线学习中最常见的三种互动形式(即视频讲座观看、课程作业访问和讨论论坛发帖)的“爆发性”因素,我们承担了预测学生在这些课程中的表现(按成绩进行操作)的任务。具体而言,我们利用条件随机场(CRF)的概率框架来形式化预测学生在不同mooc中取得的成绩顺序的问题,并考虑到该结果测量对学生跨课程总体互动趋势的上下文依赖性。基于相互作用特征组合的对比分析,我们的最佳CRF模型可以达到0.581的精度,0.660的召回率和0.560的加权f分数,超过了在每个序列位置应用的几个基线判别分类器。这些发现对启动早期教师干预具有启示意义,从而使学生参与可能与低成绩相关的不太活跃的互动维度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Connecting the Dots: Predicting Student Grade Sequences from Bursty MOOC Interactions over Time
In this work, we track the interaction of students across multiple Massive Open Online Courses (MOOCs) on edX. Leveraging the ``burstiness" factor of three of the most commonly exhibited interaction forms made possible by online learning (i.e, video lecture viewing, coursework access and discussion forum posting), we take on the task of predicting student performance (operationalized as grade) across these courses. Specifically, we utilize the probabilistic framework of Conditional Random Fields (CRF) to formalize the problem of predicting the sequence of grades achieved by a student in different MOOCs, taking into account the contextual dependency of this outcome measure on students' general interaction trend across courses. Based on a comparative analysis of the combination of interaction features, our best CRF model can achieve a precision of 0.581, recall of 0.660 and a weighted F-score of 0.560, outweighing several baseline discriminative classifiers applied at each sequence position. These findings have implications for initiating early instructor intervention, so as to engage students along less active interaction dimensions that could be associated with low grades.
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