Abstract: This paper presents the investigation of the vocabulary size of Thai university students. The main purpose of the study is to establish the number of English vocabulary in the first 10000 most occurring words list that Thai EFL students at the university level know receptively, and to see whether or not their word knowledge increase when the proceed to the higher year of study. The participants who participated in the study were 40 EFL learners from the first year, second year, third year, and fourth year of English Major at Silpakorn University in Thailand. They were requested to complete two sets of the XK_Lex test, which is the Yes/No format of vocabulary test. After which, the data was collected and analyzed statistically through the SPSS programme. The results analysis confirmed that the participants in the group of first year students hold vocabulary knowledge around 5800-5900 words from the first 10000 most frequent word list. The results also confirmed that the students process more word knowledge as the move up to the higher year in the appropriate rate.
Keywords: XK_Lex test, EFL learners, vocabulary size.
Title: Measuring Vocabulary Size of Thai University Students
Author: SUNTIPAAP SUNGPRAKUL
International Journal of Social Science and Humanities Research
ISSN 2348-3156 (Print), ISSN 2348-3164 (online)
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