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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