Background: This study investigated the scoring and criterion-related validity of the TEAP, a newly developed Test of English for Academic Purposes. In this study, scoring validity was examined by investigating the factor structure, while criterion-related validity was examined by first investigating the longitudinal change of test takers'…

Rasch testlet and bifactor models are two measurement models that could deal with local item dependency (LID) in assessing the dimensionality of reading comprehension testlets. This study aimed to apply the measurement models to real item response data of the Iranian EFL reading comprehension tests and compare the validity of the bifactor models…