Measuring English Vocabulary Size and Exploring Factors Affecting Vocabulary Learning in University Students
DOI:
https://doi.org/10.60027/iarj.2025.285442Keywords:
Vocabulary Knowledge, Vocabulary Size Test, MotivationAbstract
Background and Aims: Understanding the factors that influence vocabulary acquisition is crucial for enhancing language learning in higher education. This study investigates the vocabulary size of students within the Faculty of Humanities and Social Sciences at Sisaket Rajabhat University, exploring the role of major-specific differences and motivation in vocabulary learning.
Methodology: The sample group consisted of 169 third-year students from the Faculty of Humanities and Social Sciences at Sisaket Rajabhat University. Data were collected through a vocabulary size test and a questionnaire, and the results were analyzed using the SPSS 17.0 statistical software. The reliability of the instruments was assessed (Cronbach's alpha), as well as percentages, mean scores, and standard deviations.
Results: The findings revealed that students had an average vocabulary size of 4,490 words out of a total of 14,000 words, or 26.54%. The highest score was observed at the 1,000-word level, with an accuracy rate of 46.70%, which gradually declined at higher levels, reaching a low of 13.80% at the 14,000-word level. Notably, students majoring in Business English and language-related majors, such as Japanese and Chinese, scored higher than students in other majors at all levels. A more detailed examination of factors affecting vocabulary learning motivation indicated that overall, students had a high level of motivation to learn vocabulary. Factors such as presenting vocabulary in real-life contexts, the difficulty level of vocabulary, and learning in a relaxed atmosphere all contributed to students' motivation to learn English vocabulary.
Conclusion: The results indicate that students at Sisaket Rajabhat University have an average vocabulary size of 4,490 words, representing 26.54% of the total target vocabulary. Students performed best at the 1,000-word level, but accuracy decreased at higher levels, with the lowest score at the 14,000-word level. Notably, those majoring in Business English and language-related fields such as Japanese and Chinese had higher vocabulary scores across all levels. Additionally, students exhibited strong motivation to learn vocabulary, with key motivating factors including the use of real-life contexts, vocabulary difficulty, and a relaxed learning environment.
References
Alderson, J.C. (2000). Assessing Reading. Cambridge University Press, Cambridge.
https://doi.org/10.1017/CBO9780511732935
Asli-Badarneh, A., & Asadi, I. (2023). LexArabic: A receptive vocabulary size test to estimate Arabic proficiency. Behavior Research Methods. Available: https://doi.org/10.3758/s13428-023-02077-1
Brown, H.D. (2007). Principles of Language Learning and Teaching. Pearson Education.
Chiramanee, T., & Nirattisai, S. (2014). Vocabulary size and vocabulary learning strategies of Thai University students. Journal of Education and Practice, 5(31), 72-80.
Coxhead, A. (2000). A New Academic Word List. TESOL Quarterly, 34(2), 213-238.
Coxhead, A., Nation, P., & Sim, D., (2015). Measuring the Vocabulary Size of Native Speakers of English in New Zealand Secondary Schools. New Zealand Journal of Educational Studies. 50(1). https://doi.org/10.1007/s40841-015-0002-3.
Dörnyei, Z. (2001). Motivational strategies in the language classroom. Cambridge University Press.
Eccles, J. S., & Wigfield, A. (2002). Motivational beliefs, values, and goals. Annual Review of Psychology, 53(1), 109–132. https://doi.org/10.1146/annurev.psych.53.100901.135153.
Ellis, R. (2003). Task-Based Language Learning and Teaching. Oxford: Oxford University Press.
Gardner, R. C., & Lambert, W. E. (1972). Attitudes and Motivation in Second Language Learning. Rowley, MA: Newbury House.
Kimura, Y., Nakata, Y., and Okumura, T. (2001). Language Learning Motivation of EFL Learners in Japan—A Cross-Sectional Analysis of Various Learning Milieus. JALT Journal, 23, 47-68.
Kotchana, S., & Tongpoon-Patanasorn, A. (2015). EFL Learners’ Vocabulary Size: A Case in the Northeastern Region of Thailand. ASEAN Journal of Education, 1(1), 9–26. retrieved from https://so01.tci-thaijo.org/index.php/AJE/article/view/180797
Krashen, S. (1985). The input hypothesis: Issues and implications. New York: Longman.
Kyle, K., & Crossley, S. A. (2016). The relationship between lexical sophistication and independent and source-based writing. Journal of Second Language Writing, 34, 80-93.
Lai, HY. T. (2013). The Motivation of Learners of English as a Foreign Language Revisited. International Education Studies, 6(10), 90-101.
Laufer, B. & Nation, P. (1995). Vocabulary Size and Use: Lexical Richness in L2 Written Production. Applied Linguistics, 16 (3), 307.
Laufer, B., & Hulstijn, J. (2001). Incidental vocabulary acquisition in a second language: The construct of task-induced involvement. Applied Linguistics, 22(1), 1-26.
Locke, E. A., & Latham, G. P. (2002). Building a practically useful theory of goal setting and task motivation: A 35-year odyssey. American Psychologist, 57(9), 705–717. https://doi.org/10.1037/0003-066X.57.9.705
Long, M. H. (1983). Linguistic and Conversational Adjustments to Non-Native Speakers. Studies in Second Language Acquisition, 5, 177-193. http://dx.doi.org/10.1017/S0272263100004848
Milton, J., Treffers-Daller, J. (2013). Vocabulary size revisited: The link between vocabulary size and academic achievement. Applied Linguistics Review, 4(1), 151-172.
Nation, I. S. P. (2006). How large a vocabulary is needed for reading and listening? Canadian Modern Language Review, 63(1), 59-82.
Nation, I. S. P., & Beglar, D. (2007). A Vocabulary Size Test. The Language Teacher, 31(7), 9-13.
Nation, I., & Beglar, D. (2007). A Vocabulary Size Test. The Language Teacher, 31, 9-13.
Nation, I.S.P. (2003). Learning Vocabulary in Another Language. Cambridge University Press.
Nation, P. (2001). Learning Vocabulary in Another Language. Cambridge University Press.
Nirattisai, P., & Palanukulwong, T. (2016). A New Measure for Thai Students’ Vocabulary Size: The English-Thai Version of Vocabulary Size Test. Journal of English Studies,14, 155-181.
Olmos. C. (2009). An assessment of the vocabulary knowledge of students in the final year of secondary education. Is their vocabulary extensive enough? International Journal of English Studies, 9(S), 73-90.
Qian, D., and Schedl, M. (2004). Evaluation of an in-depth vocabulary knowledge measure for assessing reading performance. Language Testing, 21(1), 28-52.
Ryan, R. M., & Deci, E. L. (2000). Self-determination theory and the facilitation of intrinsic motivation, social development, and well-being. American Psychologist, 55(1), 68–78. https://doi.org/10.1037/0003-066X.55.1.68
Schmidt, R. W. (1994). Deconstructing consciousness: In search of useful definitions for Applied Linguistics. AILA Review, 11, 11-26.
Schmitt, N. (2008). Instructed second language vocabulary learning. Language Teaching Research, 12(3), 329-363.
Schmitt, N. (2010). Researching vocabulary: A vocabulary research manual. Palgrave Macmillan Basingstoke.
Schmitt, N., Schmitt, D., & Clapham, C. (2001). Developing and exploring the behavior of two new versions of the Vocabulary Levels Test. Language Testing, 18(1), 55-88.
Schunk, D. H., Pintrich, P. R., & Meece, J. L. (2014). Motivation in Education: Theory, Research, and Applications. Pearson.
Srisawat, C. (2017). The Vocabulary Size of Rajabhat Maha Sarakham University Students. Rajahbat Mahasarakham. Available: https://fulltext.rmu.ac.th/fulltext/2561/M126135/Srisawat%20Chawin.pdf
Sukying, A. (2023). The Role of Vocabulary Size and Depth in Predicting Postgraduate Students’ Second Language Writing Performance. LEARN Journal: Language Education and Acquisition Research Network, 16(1), 575-603.
Tandjitanon, P., Saetnan, K., Konchaieb, S., & Kurakan, P. (2020). Fostering students' English Learning motivation and creativity of student teachers through the PLEARN learning strategy. Journal of Education, Naresuan University, 22(1), 134-146.
Waldvogel, D. A. (2013). The Relationship between Vocabulary Learning Strategies and Vocabulary Size among Adult Spanish Foreign Language Learners. Journal of Language Teaching and Research, 4, 209-219.
Webb, T.L., Joseph, J., Yardley, L. and Michie, S. (2010). Using the Internet to Promote Health Behavior Change: A Systematic Review and Meta-Analysis of the Impact of Theoretical Basis, Use of Behavior Change Techniques, and Mode of Delivery on Efficacy. Journal of Medical Internet Research, 12, e4. http://dx.doi.org/10.2196/jmir.1376
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