مرکز منطقه ای اطلاع رساني علوم و فناوري -

چكيده لاتين :

This study aimed to investigate differential item functioning (DIF) on the English subtest of the Iranian National University Entrance Exam (INUEE). The effect of field of study (math, humanities, and sciences) was taken into account. The study utilized one-parameter IRT model to investigate DIF for a sample of 18000 students randomly selected out of a population of 219579 students who sat for the INUEE in 2005. The results of the study identified thirty three DIF items on different sections of the English subtest. It was also found that all DIF items in the vocabulary, and word order sections worked to the advantage of students with sciences or humanity background, whereas in grammar, language function, cloze test, and reading comprehension sections, approximately half of the DIF items were in favor of math students and half in favor of students of sciences and humanities.