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

Language Testing in Asia

Table 9 Results of uniform DIF analysis of items (IUUESEE 2018)

Item	Class A	DIF	DIF SE	Class B	DIF	DIF SE	DIF Contrast	Welch t	df	p
3	Azeri	−0.78	0.07	Luri	0.05	0.15	−0.83	−5.03	359	0.0000
5	Azeri	1.45	0.10	Luri	1.00	0.20	0.46	1.99	257	0.0472
35	Azeri	0.53	0.10	Kurdish	0.99	0.16	−0.46	−2.46	474	0.0144
36	Azeri	−0.32	0.09	Luri	0.16	0.18	−0.48	−2.42	239	0.0165
41	Azeri	1.70	0.13	Luri	1.12	0.26	0.58	2.03	162	0.0444
44	Azeri	0.60	0.09	Persian	0.10	0.09	0.50	3.82	INF	0.0001
50	Azeri	1.83	0.15	Luri	0.95	0.26	0.88	2.95	165	0.0036
56	Azeri	1.31	0.13	Kurdish	0.61	0.18	0.70	3.15	361	0.0018
56	Azeri	1.31	0.13	Luri	0.47	0.24	0.85	3.09	159	0.0024
58	Azeri	−0.35	0.11	Luri	−1.08	0.23	0.73	2.83	140	0.0054
60	Azeri	−0.35	0.11	Kurdish	0.17	0.16	−0.52	−2.69	395	0.0074
61	Azeri	−0.57	0.15	Kurdish	−0.03	0.22	− 0.54	−1.99	203	0.0482
64	Azeri	0.06	0.16	Kurdish	−0.61	0.22	0.67	2.43	211	0.0159
67	Azeri	0.83	0.14	Luri	0.00	0.27	0.83	2.76	112	0.0067
67	Azeri	0.83	0.14	Persian	0.31	0.14	0.53	2.68	555	0.0075
70	Azeri	−0.25	0.14	Kurdish	−0.85	0.22	0.60	2.28	209	0.0239
70	Azeri	−0.25	0.14	Persian	−0.68	0.16	0.43	2.02	447	0.0441