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Vocabulary Size of Korean EFL University Learners: Using an Item Response Theory Model

Title
Vocabulary Size of Korean EFL University Learners: Using an Item Response Theory Model
Author
전유아
Keywords
vocabulary size; vocabulary levels test; background variable; item difficulty; item response theory; Rasch model
Issue Date
2012-09
Publisher
한국영어어문교육학회
Citation
영어어문교육,Vol.18 No.1 [2012],p171-195(25쪽)
Abstract
While noticing that there is insufficient interest in the assessment of EFL learners' vocabulary levels or sizes, the researchers developed two tests identical in form (Forms A and B) to assess the lexical knowledge of Korean university learners at the 1st ~ 10th 1,000 word bands by adapting a pre-established vocabulary levels test (VLT). Of equal concern was to investigate if the VLT was equally a valid and reliable instrument to be used on measuring the lexical knowledge of EFL learners. The participants were 804 university freshmen enrolled in a General Education English Course from four different colleges. The learners were asked to respond to either Form A or B. While scores generally fell towards the lower frequency bands, multiple regression found the Korean College Scholastic Ability Test (CSAT) to be a significant variable for predicting the learners' vocabulary sizes. From a methodological perspective, however, noticeable differences between Forms A and B could be found with item response theory analysis. The findings of the study provide suggestions on how future VLT for testing EFL learners may have to be redesigned.
URI
http://www.ndsl.kr/ndsl/search/detail/article/articleSearchResultDetail.do?cn=JAKO201203939212882
ISSN
1226-2889
Appears in Collections:
COLLEGE OF EDUCATION[S](사범대학) > ENGLISH LANGUAGE EDUCATION(영어교육과) > Articles
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