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Chen, Chen; Liu, Yongcan – Reading in a Foreign Language, 2020
This study explored the role of vocabulary breadth and depth in second language learners' performance in IELTS academic reading tests in China. Sixty-two Chinese learners of English as a foreign language completed a vocabulary size test, a vocabulary depth test, and an IELTS reading test. Results showed that vocabulary breadth and depth both…
Descriptors: Reading Tests, Correlation, Foreign Countries, Second Language Learning
Baghaei, Purya; Aryadoust, Vahid – International Journal of Testing, 2015
Research shows that test method can exert a significant impact on test takers' performance and thereby contaminate test scores. We argue that common test method can exert the same effect as common stimuli and violate the conditional independence assumption of item response theory models because, in general, subsets of items which have a shared…
Descriptors: Test Format, Item Response Theory, Models, Test Items

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