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The Effects of Testlets on Reliability and Differential Item Functioning
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Teker, Gulsen Tasdelen; Dogan, Nuri – Educational Sciences: Theory and Practice, 2015
Reliability and differential item functioning (DIF) analyses were conducted on testlets displaying local item dependence in this study. The data set employed in the research was obtained from the answers given by 1,500 students to the 20 items included in six testlets given in English Proficiency Exam by the School of Foreign Languages of a state…
Descriptors: Foreign Countries, Test Items, Test Bias, Item Response Theory