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{
    "pk": 48947,
    "title": "The L1 Acquisition of Verb Conjugational Morphemes in Korean: Based on the Analysis of the CHILDES Corpus",
    "subtitle": null,
    "abstract": "<p>This study examines the acquisition order of Korean verb conjugational morphemes in first language (L1) development using Mean Length of Utterance (MLU) as a key indicator. Based on longitudinal spontaneous speech data from the Ryu Corpus (CHILDES), the study analyzes the emergence of grammatical forms such as tense, aspect, negation, and politeness. Results show that verb conjugational morphemes begin to appear at MLU 2.4–2.6, with significant grammatical expansion occurring at MLU 2.9–3.2. The acquisition follows a general sequence: present → past → imperfective → future. Negative forms, especially the pre-verbal an, are acquired early, while polite forms emerge later. The findings suggest that MLU is a more reliable measure of grammatical development than age, offering a more consistent framework for understanding Korean L1 acquisition.</p>",
    "language": "eng",
    "license": {
        "name": "Creative Commons Attribution-NonCommercial-NoDerivatives  4.0",
        "short_name": "CC BY-NC-ND 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNonCommercial — You may not use the material for commercial purposes.\n\nNoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by-nc-nd/4.0"
    },
    "keywords": [],
    "section": "Poster Presentations",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/62v1s0nv",
    "frozenauthors": [
        {
            "first_name": "JUYEON",
            "middle_name": "",
            "last_name": "RYU",
            "name_suffix": "",
            "institution": "Aichi Shukutoku University",
            "department": "Faculty of Global Culture and Communication"
        }
    ],
    "date_submitted": "2025-07-10T00:34:53.509000-07:00",
    "date_accepted": "2025-07-10T23:56:00.808000-07:00",
    "date_published": "2025-07-07T00:00:00-07:00",
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        "type": "pdf",
        "path": "https://journalpub.escholarship.org/japanesekoreanlinguistics/article/48947/galley/36874/download/"
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}