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

Language Testing in Asia

Table 10 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	Kurdish	−0.56	0.11	Luri	0.05	0.15	−0.61	−3.32	480	0.0010
30	Kurdish	0.43	0.21	Luri	0.93	0.35	−0.50	−1.23	89	0.2226
36	Kurdish	−0.31	0.13	Luri	0.16	0.18	−0.47	−2.15	313	0.0325
45	Kurdish	0.58	0.16	Luri	−0.07	0.21	0.65	2.47	224	0.0143
45	Kurdish	0.58	0.16	Persian	0.08	0.10	0.50	2.66	398	0.0080
50	Kurdish	1.83	0.22	Luri	0.95	0.26	0.89	2.63	218	0.0092
58	Kurdish	−0.28	0.16	Luri	−1.08	0.23	0.80	2.84	177	0.0050
64	Kurdish	−0.61	0.22	Persian	0.03	0.16	−0.64	−2.31	214	0.0219
65	Kurdish	0.98	0.30	Persian	1.63	0.24	−0.65	−1.69	153	0.0927