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    A real-life machine learning experience for predicting university dropout at different stages using academic data

    Autor: 
    Fernández-García, Antonio Jesús
    ;
    Preciado, Juan Carlos
    ;
    Melchor, Fran
    ;
    Rodriguez-Echeverría, Roberto
    ;
    Conejero Manzano, José María
    ;
    Sánchez, Fernando
    Fecha: 
    2021
    Palabra clave: 
    ensemble models; feature engineering; instance engineering; machine learning; real experiences; student dropout; Scopus; JCR
    Revista / editorial: 
    Institute of Electrical and Electronics Engineers Inc.
    Tipo de Ítem: 
    article
    URI: 
    https://reunir.unir.net/handle/123456789/12735
    DOI: 
    https://doi.org/10.1109/ACCESS.2021.3115851
    Dirección web: 
    https://ieeexplore.ieee.org/document/9548895/authors#authors
    Open Access
    Resumen:
    High levels of school dropout are a major burden on the educational and professional development of a country's inhabitants. A country's prosperity depends, among other factors, on its ability to produce higher education graduates capable of moving a country forward. To alleviate the dropout problem, more and more institutions are turning to the possibilities that artificial intelligence can provide to predict dropout as early as possible. The difficulty of accessing personal data and privacy issues that it entails force the institutions to rely on the Academic Data of their students to create accurate and reliable predictive systems. This work focuses on creating the best possible predictive model based solely on academic data, and accordingly, its capacity to infer knowledge must be maximised. Thus, Feature Engineering and Instance Engineering techniques such as dealing with redundancy, significance of the features, correlation, cardinality features, missing values, creation or elimination of features, data fusion, removal of unuseful instances, binning, resampling, normalisation, or encoding are applied in detail before the construction of well-known models such as Gradient Boosting, Random Forest, and Support Vector Machine along with an Ensemble of them at different stages: Prior to enrolment, at the end of the first semester, at the end of the second semester, at the end of the third semester, and at the end of the fourth semester. Through the construction of these predictive models that serve as inputs to a decision support system, the application of effective dropout prevention policies can be applied.
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