Sachio Hirokawa

A Multi-model SVR Approach to Estimating the CEFR Proficiency Level of Grammar Item Features

2017

Analysis of publicly available language learning corpora can be useful for extracting characteristic features of learners from different proficiency levels. This can then be used to support language learning research and the creation of educational …

Automated Evaluation of Students Comments Regarding Correct Concepts and Misconceptions of Convex Lenses

2018

It is important for teachers to understand whether students have learned correct concepts or misconceptions. To identify correct concepts and misconceptions, we attempted to analyze the characteristics of students' concept descriptions using machine learning. It …