單字常被視為語言學習的基礎，因此，許多研究探討單字與英語聽說讀寫的關係。就認讀單字而言，許多過去的研究指出，認讀單字與英語閱讀理解的關係較其與英語聽力理解的關係明顯。然而，過去的研究往往忽略第二語言程度在英語聽力理解和單字上潛在的影響；此外，過去的研究往往用閱讀的方式測量受測者的認讀字彙在英語聽力測驗表現上的影響，此方法往往高估受測者在聽力測驗時，所擁有的聽力字彙。因此，本研究改善過往研究疏漏的部分，研究聽力單字與閱讀單字以及第二語言程度在聽力測驗表現上的影響。以下為本研究探討的問題:

(1) 在考量到第二語言的程度下，認讀的單字與聽力測驗表現的關係為何?
(2) 在考量到第二語言的程度下，聽力的單字與聽力測驗表現的關係為何?
(3) 在考量到第二語言的程度下，受測者的聽力單字與認讀單字是否有落
差?
(4) 語言學習者需要習得台灣大考中心高中英文參考字彙表多少比例的單字，進而通過全民英檢中級聽力測驗或進而達到良好的高中英語聽力測驗表現?

本研究共203位高一至高三的學生參加。本研究使用大考中心單字層測驗來測量受測者聽力與認讀的單字；舊制大考英聽模擬測驗和全民英檢中級聽力測驗用來測量受測者英語聽力表現；全民英檢中級初試通過與否用來判定受測者的第二語言程度。研究結果顯示，對於第二語言程度較低的受測者，聽力與認讀單字皆與聽力測驗表現相關。其中，聽力測驗表現良好與否，聽力單字占了34.4百分比的因素，遠高於認讀單字在聽力測驗表現上的影響(12.4百分比)。對於第二語言程度較佳的受測者而言，只有聽力單字對其英語聽力測驗的表現有影響。其中，聽力測驗表現良好與否，聽力單字占了至少45%因素。為了通過全民英檢中級初試聽力測驗，受測者需至少習得大考中心公告的高中參考字彙表，字彙表單字層一至單字層二，百分之八十五的聽力字彙；字彙表單字層三至單字層四，百分之七十的聽力字彙；此外，在分析大考中心英語聽力測驗模擬試題的腳本字彙涵蓋量時發現，如能精熟大考中心公告的高中參考字彙表，字彙表單字層一至單字層四，就能達到大考中心英語聽力測驗96%字彙涵蓋量。

Vocabulary knowledge is often viewed as the building block of language. Therefore, the effect of the vocabulary knowledge in four skills (listening, speaking, reading, and writing) has long been investigated (Bonk, 2000; Laufer & Ravenhorst-Kalovski, 2010; Mecartty, 2000; Mehrpour & Rahimi, 2010; Dong, 2007; Prichard & Matsumoto, 2011; Stæhr, 2008, 2009; van Zeeland & Schmitt, 2013) . It is widely accepted that vocabulary knowledge is more significantly related to reading comprehension than to listening comprehension (Mecartty, 2000; Mehrpour & Rahimi, 2010; Stæhr, 2008; Wise, Sevcik, Morris, Lovett, & Wolf, 2007). However, these previous studies did not take the potential effect of L2 proficiency on listening and vocabulary knowledge into consideration. Also, the vocabulary knowledge in these studies was measured by testing the meanings of the words in a reading mode rather than the meanings of the words in a listening mode, which may lead to an overestimate of learners' vocabulary knowledge since Asian students' orthographic vocabulary knowledge could be bigger than their phonological vocabulary knowledge (Wang, 2015). Thus, the present study investigates the effect of vocabulary knowledge, including orthographic vocabulary knowledge and phonological vocabulary knowledge, on listening comprehension test performance when L2 proficiency is considered. The following research questions are proposed:

(1) How does orthographic vocabulary knowledge relate to listening comprehension when L2 proficiency is taken into consideration?
(2) How does phonological vocabulary knowledge relate to listening comprehension when L2 proficiency is taken into consideration?
(3) Is there a gap between the participants’ orthographic vocabulary knowledge and phonological vocabulary knowledge when L2 proficiency is taken into consideration?
(4) How many percents of the words in the College Entrance Exam Center Vocabulary Reference List do students need to know in order to pass the first stage of the GEPT intermediate-level test?

Two hundred and three Chinese-speaking participants from a senior high school in Taiwan participated in this study. To make sure that there was a variability across L2 proficiency level, the participants were from 10th grade to 12th grade. Their orthographic vocabulary knowledge and phonological vocabulary knowledge were measured by the College Entrance Exam Center Vocabulary Levels Test (the CEEC Vocabulary Levels Test) both in a reading mode and in a listening mode (Chen, 2011; Chen & Tseng, 2012). Listening comprehension test performance was measured by a mock test of the old version of the Test of English Listening Comprehension (the TELC Mock Exam) designed by the College Entrance Exam Center in Taiwan. L2 proficiency depended on the criterion of passing or failing the first stage of the GEPT intermediate-level test which include both listening and reading sections.
The results revealed that both phonological vocabulary knowledge and orthographic vocabulary knowledge were significantly related to the low-proficiency learners' listening comprehension test performance. For the low-proficiency listeners, phonological vocabulary can explain at least 34.4 percent of the variance in the TELC Mock Exam, which was more that the 12.4 percent of the variance in the TELC Mock Exam explained by orthographic vocabulary. In contrast, only the effect of phonological vocabulary knowledge on listening comprehension test performance was significant and stable for the high-proficiency learners. Phonological vocabulary knowledge can account for around 45 percent of the variance in the TELC Mock Exam. Furthermore, in order to pass the GEPT intermediate-level test (i.e., to be qualified as a high-proficiency learners in this study), listeners had to answer correctly at least 85% of the words in the first two levels of the CEEC Vocabulary Levels Test in the phonological version and at least 70% of the words in the third and fourth levels.

Adolphs, S., & Schmitt, N. (2003). Lexical coverage of spoken discourse. Applied Linguistics, 24(4), 425-438.
Adolphs, S., & Schmitt, N. (2004). Vocabulary coverage according to spoken discourse context. In P. Bogaards & B. Laufer (Eds.) Vocabulary in a Second Language: Selection, Acquisition, and Testing (pp. 39-49). Amsterdam: John Benjamins Publishing Company.
Bell, A. (1984). Language style as audience design. Language in Society, 13 (2), 145-204.
Bonk, W. J. (2000). Second language lexical knowledge and listening comprehension. International Journal of Listening, 14(1), 14-31.
Brunfaut, T. (2008). Foreign Language Reading for Academic Purposes: Students of English (Native Speakers of Dutch) Reading English Academic Texts. Unpublished PhD thesis, University of Antwerp, Belgium.
Byrnes, H. (1984). The role of listening comprehension: A theoretical base. Foreign Language Annals, 17(4), 317-329.
Chang, A. C., Wu. B. W. , & Pang, J. C. (2013). Second language listening difficulties perceived by low-level learners. Perceptual & Motor Skills, 116(2), 415-434.
Chen, L. J. (2011). An Application of Item Response Theory to Developing and Validating a Vocabulary Levels Test. Unpublished master's thesis, National Taiwan Normal University, Taipei, Taiwan
Chen, L.J. & Tseng, W. T. (2012). An application of 3PL IRT model to validating a vocabulary levels test. Journal of Applied English, 5 , 93-109
Cheung, H., Chen, H.C., Lai, C. Y., Wong, O. C., & Hills, M. (2001). The development of phonological awareness: Effects of spoken language experience and orthography. Cognition, 81(3), 227-241.
Chiang,C. C., & Dunkel, P.(1992). The effect of speech modification, prior knowledge, and listening proficiency on EFL lecture learning. TESOL Quartely, 26, 345-374.
Dong, N. (2007). Adjusting vocabulary teaching, improving writing ability. Foreign Language World, 1, 007.
Elkhafaifi, H. (2005). Listening comprehension and anxiety in the Arabic language classroom. The Modern Language Journal, 89(2), 206-220.
Flowerdew, J., & Miller, L. (2005). Second Language Listening: Theory and Practice. Cambridge, UK: Cambridge University Press.
Gilakjani, A. P., & Ahmadi, M. R. (2011). A study of factors affecting EFL learners' English listening comprehension and the strategies for improvement. Journal of Language Teaching and Research, 2(5), 977-988.
Goh, C. (2000). A cognitive perspective on language learners' listening comprehension problems. System, 28(1), 55-75.
Goh, C. (2002). Exploring listening comprehension tactics and their interaction patterns. System, 30(2), 185-206.
Golkar, M., & Yamini, M. (2007). Vocabulary, proficiency and reading comprehension. The Reading Matrix. 7(3), 88
Graham, S. (2006). Listening comprehension: The learners’ perspective. System, 34(2), 165-182.
Hasan, A. S. (2000). Learners' perceptions of listening comprehension problems. Language, Culture and Curriculum, 13(2), 137-153.
Horwitz, E. (2001). Language anxiety and achievement. Annual Review of Applied Linguistics, 21, 112-126.
Hsueh-Chao, M. H., & Nation, P. (2000). Unknown vocabulary density and reading comprehension. Reading in a Foreign Language, 13(1), 403-430.
Imhof, M., & Janusik, L. A. (2006). Development and validation of the Imhof-Janusik Listening Concepts Inventory to measure listening conceptualization differences between cultures. Journal of Intercultural Communication Research, 35(2), 79-98.
Jiang, N. (2002). Form–meaning mapping in vocabulary acquisition in a second language. Studies in Second Language Acquisition, 24(04), 617-637.
Laufer, B., & Ravenhorst-Kalovski, G. C. (2010). Lexical threshold revisited: Lexical text coverage, learners' vocabulary size and reading comprehension. Reading in a Foreign Language, 22(1), 15-30.
Lee, J.-W., & Schallert, D. L. (1997). The relative contribution of L2 language proficiency and L1 reading ability to L2 reading performance: A test of the threshold hypothesis in an EFL context. TESOL Quarterly, 31(4), 713-739.
McLean, S., Kramer, B., & Beglar, D. (in press). The creation and validation of a listening vocabulary levels test. Language Teaching Research.
Meara, P., & Jones, G. (1988). Vocabulary Size as a Placement Indicator. In P. Grunwell (Ed.). Applied Linguistics in Society. London: CILT. (ED350829).
Mecartty, F. H. (2000). Lexical and grammatical knowledge in reading and listening comprehension by foreign language learners of Spanish. Applied Language Learning, 11(2), 323-348.
Mehrpour, S., & Rahimi, M. (2010). The impact of general and specific vocabulary knowledge on reading and listening comprehension: A case of Iranian EFL learners. System, 38(2), 292-300.
Milton, J., & Hopkins, N. (2006). Comparing phonological and orthographic vocabulary size: Do vocabulary tests underestimate the knowledge of some learners? Canadian Modern Language Review, 63(1), 127-147.
Mizumoto, A., & Shimamoto, T. (2008). A comparison of aural and written vocabulary size of Japanese EFL university learners. Language Education & Technology (45), 35-51.
Nation, I. S.P. (1983): Testing and teaching vocabulary. Guideline 5, 12-25.
Nation, I.S.P, & Beglar, D. (2007). A vocabulary size test. The Language Teacher, 31(7), 9-13.
Nation, I. S.P. (2001). Learning Vocabulary in Another Language. Cambridge, UK: Cambridge University Press.
Nation, I. S.P. (2006). How large a vocabulary is needed for reading and listening? Canadian Modern Language Review/La revue canadienne des langues vivantes, 63(1), 59-82.
Nizonkiza, D. (2012). The Relationship Between Lexical Competence, Collocational Competence, and L2 Proficiency. Unpublished PhD thesis, University of Antwerp, Belgium.
Nizonkiza, D. (2012). The Relationship between Lexical Competence, Collocational Competence, and Second Language Proficiency.Unpublished PhD thesis. Universiteit Antwerpen (Belgium)
Palmer, B. C., Zhang, N., Taylor, S. H., & Leclere, J. T. (2010). Language proficiency, reading, and the Chinese-speaking English language learner: Facilitating the L1-L2 connection. Multicultural Education, 17(2), 44-51.
Peukert, H. (Ed). (2015). Transfer Effects in Multilingual Language Development (Vol.4 ). John Benjamins Publishing Company
Pilar Agustin Llach, M. D. (2010). Examining the role of L2 proficiency in L2 reading-writing relationships. Estudios Ingleses de la Universidad Complutense, 18, 35-52.
Prichard, C., & Matsumoto, Y. (2011). The effect of lexical coverage and dictionary use on L2 reading comprehension. Reading Matrix: An International Online Journal, 11(3), 207-225.
Qian, D. D. (2002). Investigating the relationship between vocabulary knowledge and academic reading performance: An assessment perspective. Language Learning, 52(3), 513-536.
Qian, D. D., & Schedl, M. (2004). Evaluation of an in-depth vocabulary knowledge measure for assessing reading performance. Language Testing, 21(1), 28-52.
Sakai, H. (2009). Effect of repetition of exposure and proficiency level in L2 listening tests. TESOL Quarterly, 43(2), 360-372.
Salazar, J. J. (2006). Longitudinal Reading Achievement and Special Education Placement of English Language Learners as a Joint Function of First Language (L1) Proficiency, Second Language Proficiency (L2), and Early Reading Skills. Unpublished PhD dissertation, University of Southern California, USA.
Schmitt, N. (2010). An Introduction to Applied Linguistics. London, UK: Routledge
Schmitt, N., Schmitt, D., & Clapham, C. (2001). Developing and exploring the behaviour of two new versions of the Vocabulary Levels Test. Language Testing, 18(1), 55-88.
Stæhr, L. S. (2008). Vocabulary size and the skills of listening, reading and writing. Language Learning Journal, 36(2), 139-152.
Stæhr, L. S. (2009). Vocabulary knowledge and advanced listening comprehension in English as a foreign language. Studies in Second Language Acquisition, 31(04), 577-607.
van Zeeland, H., & Schmitt, N. (2013). Lexical coverage in L1 and L2 listening Comprehension: The same or different from reading comprehension? Applied Linguistics, 34(4), 457-479.
Vandergrift, L. (2003). Orchestrating strategy use: Toward a model of the skilled second language listener. Language Learning, 53(3), 463-496.
Vandergrift, L. (2004). Listening to learn or learning to listen? Annual Review of Applied Linguistics, 24, 3-25.
Vandergrift, L. (2006). Second language listening: Listening ability or language proficiency? The Modern Language Journal, 90(1), 6-18.
Vandergrift, L. (2007). Recent developments in second and foreign language listening comprehension research. Language Teaching, 40(03), 191.
Vandergrift, L., & Baker, S. (2015). Learner variables in second language listening comprehension: An exploratory path analysis. Language Learning, 65(2), 390-416
Vandergrift, L., & Goh, C. C. M. (2012). Teaching and Learning Second Language Listening: Metacognition in Action. London, UK: Routledge.
Wang, S. (2015). An empirical study on the role of vocabulary knowledge in EFL listening comprehension. Theory and Practice in Language Studies, 5(5), 989-995.
Webb, S. (2010). Using glossaries to increase the lexical coverage of television programs. Reading in a Foreign Language, 22(1), 201-221.
Webb, S., & Rodgers, M. P. (2009). Vocabulary demands of television programs. Language Learning, 59(2), 335-366.
Wise, J. C., Sevcik, R. A., Morris, R. D., Lovett, M. W., & Wolf, M. (2007). The relationship among receptive and expressive vocabulary, listening comprehension, pre-reading skills, word identification skills, and reading comprehension by children with reading disabilities. Journal of Speech, Language, and Hearing Research, 50(4), 1093-1109.
Xiao, L. (2007). Assessing the roles of breadth and depth of vocabulary knowledge in second language proficiency. Foreign Language Teaching and Research, 5, 006.
Zareva, A., Schwanenflugel, P., & Nikolova, Y. (2005). Relationship between lexical competence and language proficiency: Variable sensitivity. Studies in Second Language Acquisition, 27(4), 567-595.
鄭恆雄. (2002). 大學入學考試中心高中英文參考字彙表, 台北: 大學入學考試中心.
財團法人語言測驗中心 (2014). 全民英語能力分級檢定測驗正式考題中級六.