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

Language Testing in Asia

Table 13 Results of uniform DIF analysis of items (IUUESEE 2019)

Item	Class A	DIF	DIF SE	Class B	DIF	DIF SE	DIF Contrast	Welch t	df	p
11	Kurdish	0.29	0.13	Luri	0.78	0.17	−0.49	−2.25	435	0.0252
12	Kurdish	−1.75	0.15	Luri	−2.40	0.21	0.64	2.54	358	0.0115
14	Kurdish	0.18	0.15	Luri	−0.34	0.17	0.52	2.29	352	0.0227
14	Kurdish	0.18	0.15	Persian	−0.31	0.09	0.49	2.85	395	0.0046
16	Kurdish	0.16	0.13	Luri	−0.28	0.15	0.44	2.16	425	0.0310
20	Kurdish	−1.18	0.12	Persian	−1.70	0.08	0.52	3.54	677	0.0004
22	Kurdish	0.41	0.24	Persian	1.03	0.13	−0.62	−2.24	156	0.0262
27	Kurdish	−0.01	0.15	Persian	0.44	0.09	−0.44	−2.53	375	0.0118
35	Kurdish	0.87	0.17	Luri	0.32	0.20	0.55	2.15	306	0.0322
37	Kurdish	−0.32	0.13	Luri	0.30	0.18	−0.62	−2.76	325	0.0061
39	Kurdish	−2.72	0.18	Luri	−2.15	0.18	−0.57	−2.26	528	0.0241
40	Kurdish	−1.02	0.12	Luri	−0.22	0.15	−0.80	−4.09	426	0.0001
42	Kurdish	−0.38	0.15	Persian	−0.94	0.10	0.56	3.11	408	0.0020
43	Kurdish	0.36	0.13	Luri	0.88	0.19	−0.51	−2.19	351	0.0290
57	Kurdish	1.00	0.18	Persian	0.42	0.11	0.58	2.74	303	0.0065
59	Kurdish	−0.69	0.24	Persian	−0.01	0.15	−0.68	−2.39	156	0.0179
65	Kurdish	1.38	0.33	Luri	−0.05	0.43	1.43	2.63	59	0.0110
68	Kurdish	2.05	0.26	Persian	2.70	0.19	−0.65	−2.05	330	0.0407
70	Kurdish	0.95	0.30	Luri	0.02	0.36	0.93	1.99	93	0.0499