同时预测学生选课与成绩,显著提升学业表现预判准确率。
Jointly Predicting Courses and Grades Using a Transformer-Based Model

- 用基于学期的编码捕捉课程并行影响,联合建模选课与成绩
- 相比单独预测成绩,平均绝对误差降低近50%
- 适合高校用于早期预警系统,支持新机构快速适配
现有学习分析预测模型常将学生学业历史视为简单序列,忽视了每学期课程的并行性,可能导致重负荷或高难度课程学生的成绩预测不准确。本文提出一种基于Transformer的学术课程-成绩预测模型(TRACE),通过联合预测学生下一学期的课程集合及其对应成绩来解决此问题。该方法按学期对课程进行编码,以捕捉课程并行的影响,并设计了一种结合课程集合与成绩预测的新损失函数。在十年机构数据上训练的结果显示,联合预测课程与成绩可使预测质量显著提升,相较仅预测成绩的相同架构,平均绝对误差降低近50%。模型还优于传统LSTM序列模型和图神经网络方法,且可自然融入学生属性数据。本研究展示了现代神经网络在构建可解释模型方面的潜力,可通过再训练与校准快速适配新院校,强调了在训练中预测课程选择的重要性。我们讨论了该模型在高等教育机构早期预警系统中的应用前景。
原文摘要 · Abstract (English)
Existing predictive models in learning analytics often treat student academic history as a simple sequence, overlooking the concurrent nature of courses taken within a semester. This simplification can lead to inaccurate performance predictions, particularly for students with heavy or challenging course loads. This paper introduces a TRansformer for Academic Course-grade Estimation (TRACE) that addresses this limitation by jointly predicting both the set of courses a student will take and their corresponding grades for an upcoming semester. Our approach encodes courses on a per-semester basis to capture the effects of course concurrency and utilizes a novel loss function combining course-set prediction with grade prediction. We demonstrate that predicting courses taken in addition to the grades in those courses leads to significant improvements in prediction quality. Trained on ten years of institutional data, our joint prediction model reduces mean absolute error by nearly 50% compared to an identical architecture that predicts grades alone. The model also outperforms traditional LSTM-based sequential models, as well as graph neural network-based approaches, and offers natural ways to incorporate student attribute data. This work demonstrates the utility of modern neural architectures for creating interpretable models that can be adapted to new institutions via retraining and recalibration, as well as the importance of key techniques, such as predicting courses taken during training. We discuss how this model could be incorporated into early detection systems at institutions of higher education.
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