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

Language Testing in Asia

Table 5 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	Luri	−0.44	0.17	Persian	−1.06	0.09	0.62	3.30	279	0.0011
6	Luri	0.29	0.18	Persian	−0.17	0.08	0.46	2.34	251	0.0199
7	Luri	−0.80	0.14	Persian	−1.28	0.08	0.48	2.96	390	0.0033
17	Luri	−1.02	0.24	Persian	−0.41	0.12	−0.61	−2.28	133	0.0241
23	Luri	−0.09	0.25	Persian	1.24	0.15	−1.33	−4.51	138	0.0000
28	Luri	1.12	0.32	Persian	2.27	0.16	−1.16	−3.23	100	0.0017
32	Luri	−0.01	0.18	Persian	−0.50	0.09	0.49	2.39	216	0.0177
36	Luri	−0.72	0.20	Persian	−1.35	0.10	0.64	2.78	186	0.0059
38	Luri	0.83	0.24	Persian	1.36	0.12	−0.53	−1.99	169	0.0484
48	Luri	0.05	0.29	Persian	−0.75	0.15	0.81	2.47	99	0.0151
57	Luri	−0.16	0.25	Persian	−0.73	0.13	0.57	2.01	122	0.0467
61	Luri	0.00	0.26	Persian	1.07	0.13	−1.07	−3.67	116	0.0004
63	Luri	−0.57	0.29	Persian	0.19	0.15	−0.76	−2.34	90	0.0217
64	Luri	1.25	0.37	Persian	2.07	0.18	−0.82	−−2.01	86	0.0477
65	Luri	1.47	0.52	Persian	2.93	0.30	−1.46	−2.45	62	0.0172