A Study on Verification Methods of Vocabulary Grade

In this study, a new method was designed and verified to verify the validity of the 'vocabulary grading list', which selected and graded educational vocabulary to support systematic vocabulary teaching and learning in school education. As a verification method, the following two-way method was devised. First, as a way to expand language life beyond school education, it is a way to verify validity by checking whether the vocabulary grade to be verified is a level that appropriately reflects general language life in the wider world than school education. To implement this plan, a hierarchy of vocabulary extracted from a large-scale corpus, which is a new basic data, was set up and a method of comparative analysis with the grade of this study was designed. Second, it is a convergent method to verify the validity by focusing more on the educational purpose of the vocabulary grade and checking whether it is a level that can explain specific teaching-learning aspects of school education. To implement this plan, a method was designed to reveal the degree of linkage with textbook text readability levels of various subjects through correlation analysis and regression analysis. As a result of the verification, the vocabulary grade of this study was quite consistent with the lexical hierarchy extracted based on the large-scale corpus and the level of readability evaluation of textbook texts, but showed a tendency to show a high degree of concordance, especially in low-level easy vocabulary, and the verification result index was poor. If not, they showed mutual similarity. Through this, it was confirmed that the verification method of this study was partially effective, and it could be said that it was a useful verification result in that it consistently informs the direction of supplementation of the vocabulary ranking list. The vocabulary grade verification method explored in this study is meaningful in that it improved the empirical quality of vocabulary grade setting and grade verification.