딥러닝 기반 언어모델을 이용한 한국어 학습자 쓰기 평가의 자동 점수 구간 분류 -KoBERT와 KoGPT2를 중심으로-

초록

Automatic Score Range Classification of Korean Essays Using Deep Learning-based Korean Language Models-The Case of KoBERT & KoGPT2-. We investigate the performance of deep learning-based Korean language models on a task of automatically classifying Korean essays written by foreign students. We construct an experimental data set containing a total of 304 essays, which include essays discussing the criteria for choosing a job (‘job’), conditions of a happy life (‘happiness’), relationship between money and happiness, and definition of success. These essays were divided into four scoring levels, and using this 4-class data set, we fine-tuned two Korean deep learning-based language models, namely, KoBERT and KoGPT2, to use them in the automatic essay classification experiment. The 7-fold cross validation classification accuracies of ‘job’ and ‘happiness’ essays were 48.8% and 65.2% respectively for KoBERT, and 50.6% and 58.9% respectively for KoGPT2. Furthermore, the 7-fold cross validation classification accuracies of the integrated dataset that combined all essays were 54.5% and 46.5% for KoBERT and KoGPT2 respectively.

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