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ERIC Number: EJ875614
Record Type: Journal
Publication Date: 2010
Pages: 22
Abstractor: As Provided
Reference Count: 49
ISSN: ISSN-0265-5322
Assessing the Accuracy and Consistency of Language Proficiency Classification under Competing Measurement Models
Zhang, Bo
Language Testing, v27 n1 p119-140 2010
This article investigates how measurement models and statistical procedures can be applied to estimate the accuracy of proficiency classification in language testing. The paper starts with a concise introduction of four measurement models: the classical test theory (CTT) model, the dichotomous item response theory (IRT) model, the testlet response theory (TRT) model, and the polytomous item response theory (Poly-IRT) model. Following this, two classification procedures are presented: the Livingston and Lewis method for CTT and the Rudner method for the three IRT-based models. The utility of these models and procedures are then evaluated by examining the accuracy of classifying 5000 language test takers from a large-scale language certification examination into two proficiency categories. (Contains 7 tables and 4 figures.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A