This study addresses the lack of clarity regarding the receptive and productive vocabulary sizes, levels, and profiles of first-year Korean EFL university students in the Korean English as a Foreign Language (EFL) context. Conducted over five years, the four-stage study first measured the receptive vocabulary sizes of 963 first-year students using the Nation & Beglar (2007) online Vocabulary Size Test. In the second stage, a subset of 126 students were assessed for controlled productive vocabulary using the Laufer & Nation (1999) Productive Vocabulary Levels Test. The third and fourth stages analyzed learners’ free productive vocabulary through a corpora analysis of 492 written essays and 492 spoken monologues by applying the Laufer & Nation (1995) Lexical Frequency Profile and the Moving-Average Type-Token Ratio (Covington & McFall, 2010). Adopting a cross-sectional quantitative design, the median receptive vocabulary size of 7,900 word families. Controlled productive vocabulary, however, was largely limited to the 2,000-word families level. Analyses of free productive vocabulary further revealed a strong reliance on the 1,000-word families level across both written and spoken corpora. These findings highlight a substantial gap between receptive and productive vocabulary knowledge and suggest the need for targeted pedagogical interventions.
목차
Ⅰ. Introduction Ⅱ. Literature Review Ⅲ. Research Method A. Participants B. Instruments C. Procedure Ⅳ. Results Ⅴ. Discussion Ⅵ. Conclusions and Implications References Abstract