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Table 11 Results of uniform DIF analysis of items (IUUESEE 2018)

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

Item

Class A

DIF

DIF SE

Class B

DIF

DIF SE

DIF Contrast

Welch t

df

p

3

Luri

0.05

0.15

Persian

−0.51

0.07

0.56

3.46

346

0.0006

4

Luri

0.64

0.16

Persian

0.21

0.07

0.43

2.49

345

0.0131

41

Luri

1.12

0.26

Persian

1.72

0.13

−0.61

−2.11

162

0.0366

50

Luri

0.95

0.26

Persian

1.87

0.14

−0.92

−3.13

156

0.0021

58

Luri

−1.08

0.23

Persian

−0.20

0.11

−0.88

−3.39

139

0.0009

65

Luri

0.61

0.41

Persian

1.63

0.24

−1.03

−2.15

60

0.0360