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研究生: 柯思勤
Ke, Sih-Cin
論文名稱: 以語料庫為本的研究—探討 Coursera 大規模開放式線上課程的字彙涵蓋量
A Corpus-based Study on the Lexical Coverage of Coursera MOOCs
指導教授: 陳浩然
Chen, Hao-Jan
口試委員: 林至誠
Lin, Chih-Cheng
高照明
Gao, Zhao-Ming
陳浩然
Chen, Hao-Jan
口試日期: 2022/05/25
學位類別: 碩士
Master
系所名稱: 英語學系
Department of English
論文出版年: 2022
畢業學年度: 110
語文別: 英文
論文頁數: 110
中文關鍵詞: 詞彙覆蓋率大規模開放式線上課程學術口語單字學術英語
英文關鍵詞: lexical coverage, MOOCs, academic spoken vocabulary, English for academic purposes (EAP)
研究方法: 實驗設計法
DOI URL: http://doi.org/10.6345/NTNU202200502
論文種類: 學術論文
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  • 文獻指出以英語做為外語學習者在接觸學術英文聽力(如大規模開放式線上課程)時,常面臨的一項挑戰是單字量不足,除此之外,對於專業單字不熟悉也是影響學術聽力理解的原因之一。因此,本研究旨在透過(a)計算 Coursera大規模開放式線上課程的詞彙覆蓋率與(b)計算學術口語詞彙表對於 Coursera 大規模開放式線上課程的詞彙覆蓋率,探討理解 Coursera 大規模開放式線上課程所需的單字量,以及其學術口語單字檔案。
    研究結果顯示要達到 95%的詞彙覆蓋率,需要 3,000 個字彙量加上專有名詞、邊際詞彙、複合字以及首字母縮略字;而要達到 98%的詞彙覆蓋率,則需6,000 個字彙加上專有名詞、邊際詞彙、複合字以及首字母縮略字,然而,不同領域所需的單字量有所不同。至於學術口語詞彙的整體覆蓋率,學術口語詞彙表(Dang, Coxhead, & Webb, 2017)覆蓋了 90.77% 的 Coursera MOOCs 語料庫,然而,ASWL 在各領域的覆蓋率並不相同。上述發現表明,以英語做為外語學習者需要掌握 3,000 到 6,000 個詞彙以及專有名詞、邊際詞彙、複合字和首字母縮略字,才能充分理解 Coursera 大規模開放式線上課程。研究結果還表明,學習學術口語詞彙表有助於學術聽力理解,因為學習者在聽 Coursera 大規模開放式線上課程時很可能會遇到學習學術口語詞彙表中的詞彙。根據以上的發現,本研究亦提出英語教學上之意義探討。

    Studies have found that the common challenge that EFL (English as Foreign Language) learners face when listening to authentic academic English materials, such as MOOCs, is a lack of vocabulary. Moreover, unfamiliar technical or specialized vocabulary can be a factor affecting their listening comprehension as well. Therefore, the present study aims to investigate the vocabulary size needed for adequate listening comprehension and to determine the academic vocabulary profiles of Coursera MOOCs by (a) measuring the lexical coverage of the Coursera MOOCs, and (b) determining the coverage of academic spoken vocabulary in Coursera MOOCs.
    The results show that, in general, it requires 3,000 vocabulary knowledge plus proper nouns (PN), marginal words(MW), transparent compounds(TC), and acronyms(AC) to reach 95% coverage of the Coursera MOOCs corpus; to reach 98% coverage, it requires 6,000 vocabulary knowledge plus PN, MW, TC, and AC. However, the vocabulary size needed for each discipline differs between fields. As for the coverage of academic spoken vocabulary overall, the Academic Spoken Word List (Dang, Coxhead, & Webb,2017) covered 90.77% of the Coursera MOOCs corpus. However, the ASWL coverage is not evenly distributed across fields. The above findings indicate that EFL learners need to acquire 3,000 to 6,000 vocabulary plus PN, MW, TC, and AC to have adequate comprehension of the Coursera MOOCs. The findings also suggest that studying Academic spoken Word List is beneficial for academic listening comprehension because it is highly likely that learners encounter the ASWL vocabulary when listening to Coursera MOOCs. Pedagogical implications have been discussed based on the findings.

    摘要 I Abstract III Acknowledgements V CHAPTER ONE INTRODUCTION 1 1.1 Background of the Study 1 1.2 Purposes and Significance of the Study 6 CHAPTER TWO LITERATURE REVIEW 9 2.1 Challenges of Comprehending Authentic English Input 9 2.1.1 Challenges of Comprehending Reading Materials 10 2.1.2 Challenges of Comprehending Listening Materials 12 2.2 Vocabulary Size Necessary for Adequate Comprehension 15 2.2.1 Language Threshold For Adequate Comprehension 16 2.2.2 Lexical Coverage and Reading Comprehension 18 2.2.3 Lexical Coverage and Listening Comprehension 21 2.3 Summary of Chapter Two 31 2.4 Research Question 32 CHAPTER THREE METHOD 34 3.1 Materials 34 3.1.1 The Coursera Corpus 34 3.1.2 Word lists 39 3.2 Instrument 43 3.3 Procedure 44 3.3.1 Corpus Creation 44 3.3.2 Data Analysis 46 CHAPTER FOUR RESULTS 48 4.1 Vocabulary Size Necessary for Adequate Comprehension 48 4.1.1 BNC/COCA List Representation in the Overall Coursera MOOCs Corpus 48 4.1.2 BNC/COCA List Representation in Each Field and Sub-field of the Coursera MOOCs Corpus 51 4.2 The Academic Spoken Vocabulary Profiles 59 4.2.1 ASWL Representation in the Overall Coursera MOOCs Corpus 59 4.2.2 ASWL Representation in Each Field and Sub-field of the Coursera MOOCs Corpus 60 CHAPTER FIVE DISCUSSION AND CONCLUSION 68 5.1 Summary of Findings 68 5.2 Discussion on Research Findings 70 5.2.1 The Vocabulary Size Necessary for the Overall Coursera MOOCs Corpus 70 5.2.2 The Vocabulary Size Necessary for Each Field and Sub-field of the Coursera MOOCs Corpus 73 5.2.3 The Academic Spoken Vocabulary Profiles of the Overall Coursera MOOCs Corpus 81 5.2.4 The Academic Spoken Vocabulary Profiles of Each Field and Sub-field of the Coursera MOOCs Corpus 84 5.3 Limitations of the Study 85 5.4 Pedagogical Implications 87 REFERENCE 90 Appendix A 96

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