Item#
|
Factor loading*†
|
Item−total correlation
|
Mean (SD)
|
S
|
K
| |
Infit MnSq
|
Outfit MnSq
|
Difficulty
|
Discrimination
|
DIF contrast across gender §,¶
|
---|
Item 1
|
0.700
|
.53
|
2.72 (1.03)
|
−.21
|
−1.13
| |
1.24
|
1.35
|
−0.98
|
0.71
|
0.31
|
Item 2
|
0.732
|
.61
|
2.03 (1.04)
|
.66
|
−.79
| |
0.89
|
0.90
|
−0.58
|
1.01
|
−0.32
|
Item 3
|
0.783
|
.57
|
2.66 (1.06)
|
−.21
|
−1.18
| |
0.97
|
0.92
|
−0.79
|
1.06
|
−0.34
|
Item 4
|
0.969
|
.73
|
2.17 (1.07)
|
.42
|
−1.11
| |
1.03
|
0.97
|
0.82
|
1.01
|
−0.45
|
Item 5
|
0.925
|
.68
|
2.26 (1.05)
|
.33
|
−1.11
| |
0.69
|
0.68
|
0.53
|
1.38
|
0.35
|
Item 6
|
0.531
|
.52
|
1.58 (.92)
|
1.45
|
.96
| |
1.24
|
1.17
|
0.48
|
0.88
|
0.15
|
Item 7
|
0.743
|
.58
|
2.07 (1.12)
|
.60
|
−1.06
| |
1.03
|
0.98
|
−0.67
|
0.97
|
0.15
|
Item 8
|
0.832
|
.66
|
2.28 (1.01)
|
.29
|
−.99
| |
1.07
|
1.10
|
0.43
|
0.88
|
0.10
|
Item 9
|
0.797
|
.72
|
1.68 (.93)
|
1.18
|
.31
| |
0.69
|
0.69
|
0.13
|
1.37
|
00
|
Item
10
|
0.558
|
.48
|
1.89 (1.01)
|
.76
|
−.66
| |
1.50
|
1.50
|
−0.41
|
0.67
|
−0.15
|
Item 11
|
0.706
|
.68
|
1.54 (.87)
|
1.59
|
1.57
| |
0.75
|
0.69
|
0.54
|
1.35
|
0.18
|
Item 12
|
0.429
|
.43
|
1.55 (.84)
|
1.44
|
1.13
| |
1.28
|
1.09
|
0.53
|
0.80
|
00
|
Item 13
|
0.856
|
.64
|
2.04 (1.11)
|
.58
|
−1.08
| |
0.80
|
0.82
|
−0.78
|
1.27
|
00
|
Item 14
|
0.751
|
.67
|
1.74 (.99)
|
1.06
|
−.15
| |
0.86
|
0.81
|
0.06
|
1.20
|
−0.32
|
Item 15
|
0.652
|
.54
|
1.97 (1.02)
|
.68
|
−.74
| |
1.33
|
1.43
|
−0.11
|
0.68
|
0.26
|
Item 16
|
0.523
|
.56
|
1.50 (.85)
|
1.67
|
1.86
| |
1.17
|
1.12
|
0.71
|
0.93
|
0.46
|
Item 17
|
0.696
|
.56
|
2.05 (1.05)
|
.63
|
−.84
| |
1.13
|
1.15
|
−0.29
|
0.84
|
−0.04
|
Item 18
|
0.757
|
.63
|
2.09 (1.02)
|
.55
|
−.85
| |
0.69
|
0.71
|
−0.38
|
1.36
|
−0.36
|
Item 19
|
0.569
|
.60
|
1.77 (.82)
|
.97
|
.52
| |
0.89
|
0.86
|
0.39
|
1.04
|
0.46
|
Item 20
|
0.699
|
.58
|
1.77 (1.03)
|
1.21
|
.22
| |
0.96
|
0.80
|
0.39
|
1.31
|
−0.39
|
- MnSq = mean square error; DIF = differential item functioning; S = Skewness; K = Kurtosis
- *All factor loadings were significant at p < 0.001
- †Based on the first-order confirmatory factor analysis (CFA)
- §DIF contrast > 0.5 indicates substantial DIF
- #DIF contrast across gender = Difficulty for male-Difficulty for female