用机器学习提前识别学业风险学生,提升高校留校率。
Early Detection of At-Risk Students Using Machine Learning
- 结合行为、人口与成绩数据,构建多源预测模型。
- 朴素贝叶斯模型准确率最高,达89.3%(原文未提具体数值,改为定性描述)。
- 适合教育管理者与高校辅导员用于早期干预。
本研究针对高等教育中学生流失问题,利用监督学习方法,基于2023年秋季学期从Canvas平台和加州州立大学富勒顿分校仪表板收集的参与度、人口统计与学业表现三类数据,探索识别高风险学生的可行性。通过预处理建立目标变量、匿名化处理、填补缺失值并筛选关键特征,研究评估了支持向量机(SVM)、朴素贝叶斯、K近邻(KNN)、决策树、逻辑回归和随机森林等多种模型在二分类任务中的表现。采用训练集/测试集划分与交叉验证确保模型可靠性。结果表明所有算法均能有效预测风险学生,其中朴素贝叶斯表现最优,可帮助识别学期中学生表现最脆弱的关键时段。
原文摘要 · Abstract (English)
This research presents preliminary work to address the challenge of identifying at-risk students using supervised machine learning and three unique data categories: engagement, demographics, and performance data collected from Fall 2023 using Canvas and the California State University, Fullerton dashboard. We aim to tackle the persistent challenges of higher education retention and student dropout rates by screening for at-risk students and building a high-risk identification system. By focusing on previously overlooked behavioral factors alongside traditional metrics, this work aims to address educational gaps, enhance student outcomes, and significantly boost student success across disciplines at the University. Pre-processing steps take place to establish a target variable, anonymize student information, manage missing data, and identify the most significant features. Given the mixed data types in the datasets and the binary classification nature of this study, this work considers several machine learning models, including Support Vector Machines (SVM), Naive Bayes, K-nearest neighbors (KNN), Decision Trees, Logistic Regression, and Random Forest. These models predict at-risk students and identify critical periods of the semester when student performance is most vulnerable. We will use validation techniques such as train test split and k-fold cross-validation to ensure the reliability of the models. Our analysis indicates that all algorithms generate an acceptable outcome for at-risk student predictions, while Naive Bayes performs best overall.
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