Automated Thematic Coherence Scoring of Student Essays Written in Portuguese

  • Rafael Pacheco UFPE
  • Luiz Rodrigues UFAL
  • Lucas Lins UFRPE
  • Péricles Miranda UFRPE
  • Valmir Macário UFRPE
  • Seiji Isotani USP / Harvard Graduate School of Education
  • Thiago Cordeiro UFAL
  • Ig Ibert Bittencourt UFAL / Harvard Graduate School of Education
  • Diego Dermeval UFAL
  • Dragan Gašević Monash University
  • Rafael Ferreira Mello CESAR School / Monash University

Resumo


While Thematic Coherence is a fundamental aspect of essay writing, scoring it is labor-intensive. This issue is often addressed using machine learning algorithms to estimate the score. However, related work is mostly limited to the English language or argumentative essays. Consequently, there is a lack of research on other widely used languages and essay types, such as Brazilian Portuguese and narrative essays. Hence, this paper reports on the findings of a study that aimed to evaluate the value of machine learning algorithms to automatically score the Thematic Coherence of both narratives (n = 400) and argumentative (n = 6567) essays written in Brazilian Portuguese. Expanding on previous studies, this paper evaluated regression models using conventional, feature-based algorithms according to essays’ linguistic features. Overall, we found that Extra Trees was the best performing algorithm, yielding predictions with moderate to strong correlations with human-generated scores. Mainly, those findings expand the literature with evidence on the potential of machine learning to estimate the Thematic Coherence of narrative and argumentative essays, suggest an improved performance for the former type.

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Publicado
06/11/2023
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PACHECO, Rafael et al. Automated Thematic Coherence Scoring of Student Essays Written in Portuguese. In: SIMPÓSIO BRASILEIRO DE INFORMÁTICA NA EDUCAÇÃO (SBIE), 34. , 2023, Passo Fundo/RS. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2023 . p. 1086-1097. DOI: https://doi.org/10.5753/sbie.2023.233447.