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https://doi.org/10.24546/81006706
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2024-03-29
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81006706 (fulltext)
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メタデータID
81006706
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open access
出版タイプ
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タイトル
Assessing Lexical Diversity Measures in Short Second Language Production : Using Japanese EFL Essay Writing in the ICNALE
著者
著者名
Ishii, Takumi
収録物名
Learner Corpus Studies in Asia and the World
巻(号)
2
ページ
261-273
出版者
神戸大学国際コミュニケーションセンター
刊行日
2014-05-31
公開日
2014-06-25
抄録(自由利用可)
The purpose of the present study is to assess 10 lexical diversity (LD) measures using short second language ([.2) production. Despite their applications in many areas of language studies and importance in language acquisition studies, LD measures are notoriously sensitive to text length. To overcome the text length problem, a large number of LD measures have been proposed. Their robustness, however, has not yet been fully investigated in short L2 production, particularly in writing. The present study. therefore, examined the robustness of 10 LD measures using 32 essays written by Japanese learners of English as a foreign language (EFL) from the International Corpus Network of Asian Learners of English (ICNALE). All essays were divided into 25 segments ranging from 60 to 200 tokens. The results showed that (a) Yule's K was independent of text length across the token range and thus the most robust LD measure, (b) D and the measure of textual lexical diversity (MTLD) were also minimally affected by text length, and (c) even these LD measures should be used with written or spoken texts of more than 100 tokens. In summary, the findings of the present study significantly contribute to the assessment of LD measures in second language acquisition (SLA) studies and show clear directions for future studies.
カテゴリ
Learner Corpus Studies in Asia and the World
>
2号(2014-05-31)
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資源タイプ
departmental bulletin paper
言語
English (英語)
ISSN
2187-6746
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URI
http://www.solac.kobe-u.ac.jp/
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