Item performance across native language groups on the Iranian National University Entrance English Exam: a nationwide study

Language Testing in Asia

Table 8 Results of uniform DIF analysis of items (IUUESEE 2017)

Item	Class A	DIF	DIF SE	Class B	DIF	DIF SE	DIF Contrast	Welch t	df	p
18	Kurdish	−0.55	0.16	Persian	−0.04	0.11	−0.51	−2.67	365	0.0079
22	Kurdish	−1.41	0.14	Persian	−2.00	0.11	0.59	3.25	575	0.0012
24	Kurdish	1.15	0.21	Persian	1.84	0.15	−0.69	−2.65	351	0.0083
39	Kurdish	1.20	0.18	Persian	0.56	0.11	0.64	3.03	359	0.0026
53	Kurdish	−0.47	0.17	Azeri	−0.01	0.11	−0.46	−2.27	328	0.0239
53	Kurdish	−0.47	0.17	Luri	0.21	0.26	−0.68	−2.23	138	0.0273
66	Kurdish	−0.52	0.24	Luri	0.41	0.34	−0.93	−2.22	93	0.0292
66	Kurdish	−0.52	0.24	Persian	0.13	0.16	−0.65	−2.24	153	0.0266