L2K-ARG

Abstract The present study introduces an open-access corpus of Korean second language argumentative writing (L2K-ARG) produced by university-level learners with different first-language backgrounds. The corpus contains 484 essays written in response to three standardized prompts under timed, prompt-controlled settings. Its design was informed by the framework proposed by Egbert et al. (2022) , which defines representativeness based on how well a corpus reflects the target domain and the distribution of linguistic features within that domain. To characterize the learners presented in the corpus, the dataset includes general Korean proficiency as well as writing proficiency scores based on an analytic rubric. This resource aims to complement existing Korean learner corpora by providing a publicly available, prompt-controlled argumentative writing samples with learner proficiency information, supporting reproducible research in L2 Korean.