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

Language Testing in Asia

Table 3 Results of uniform DIF analysis of items (IUUESEE 2016)

Item	Class A	DIF	DIF SE	Class B	DIF	DIF SE	DIF Contrast	Welch t	df	p
3	Azeri	−0.89	0.09	Luri	−0.44	0.17	−0.45	−2.39	279	0.0174
11	Azeri	−0.22	0.10	Kurdish	−0.70	0.15	0.47	2.61	426	0.0093
23	Azeri	0.48	0.13	Kurdish	−0.01	0.20	0.49	2.04	230	0.0422
23	Azeri	0.48	0.13	Luri	−0.09	0.25	0.57	2.00	120	0.0480
23	Azeri	0.48	0.13	Persian	1.24	0.15	−0.76	−3.85	555	0.0001
28	Azeri	2.02	0.16	Luri	1.12	0.32	0.90	2.51	100	0.0137
36	Azeri	−1.23	0.10	Luri	−0.72	0.20	−0.52	−2.27	184	0.0244
50	Azeri	0.28	0.13	Persian	−0.17	0.13	0.45	2.44	610	0.0150
58	Azeri	0.14	0.17	Persian	−0.35	0.16	0.49	2.18	436	0.0300
61	Azeri	1.13	0.13	Luri	0.00	0.26	1.13	3.87	115	0.0002
62	Azeri	1.60	0.13	Persian	2.03	0.14	−0.43	−2.32	911	0.0207
65	Azeri	2.73	0.28	Luri	1.47	0.52	1.26	2.14	59	0.0365
70	Azeri	0.15	0.15	Persian	−0.37	0.14	0.52	2.55	526	0.0110