Table 2 Estimates for items parameters

1

-0.62

0.06

0.88

-2.0

0.91

-1.4

.56

.55

1.13

2

-0.71

0.06

1.18

2.6

1.16

2.3

.48

.54

0.79

4

0.48

0.06

0.85

-2.4

0.86

-2.3

.62

.59

1.17

5

-0.26

0.06

1.10

1.6

1.16

2.3

.56

.57

0.87

6

-0.01

0.06

0.94

-0.9

0.95

-0.7

.58

.58

1.07

7

0.45

0.06

1.29

4.2

1.29

4.2

.50

.59

0.64

8

-0.66

0.06

0.85

-2.4

0.84

-2.5

.62

.55

1.20

10

-0.16

0.06

1.71

9.1

1.78

9.8

.38

.57

0.16

11

-0.25

0.06

1.14

2.0

1.14

2.1

.59

.57

0.85

12

-0.15

0.06

0.67

-5.7

0.68

-5.5

.67

.57

1.37

13

0.24

0.06

1.12

1.8

1.14

2.1

.57

.59

0.87

14

0.06

0.06

1.22

3.3

1.27

3.9

.49

.58

0.70

15

0.92

0.06

1.30

4.4

1.30

4.4

.51

.60

0.64

16

0.00

0.06

0.89

-1.8

0.87

-2.0

.62

.58

1.15

17

0.57

0.06

0.85

-2.5

0.87

-2.2

.60

.60

1.18

18

0.08

0.06

0.80

-3.3

0.80

-3.4

.66

.58

1.25

19

0.63

0.06

0.97

-0.5

0.96

-0.6

.63

.60

1.04

21

0.73

0.06

0.82

-3.0

0.82

-3.0

.65

.60

1.21

22

0.10

0.06

0.83

-2.7

0.83

-2.8

.62

.58

1.21

23

-0.02

0.06

0.93

-1.1

0.95

-0.7

.59

.58

1.08

24

0.10

0.06

0.84

-2.6

0.84

-2.6

.67

.58

1.20

25

-0.71

0.06

0.85

-2.3

0.85

-2.3

.63

.54

1.19

Items

ᅟMEAN

0.00

0.06

1.00

-0.3

1.01

-0.1

ᅟSD

0.48

0.00

0.23

3.3

0.24

3.4

ᅟSeparation

7.58

ᅟReliability

0.98

ᅟRMSE

0.06

ᅟRS-MC

-1.00

Persons

ᅟMEAN

0.75

0.27

1.01

-0.2

1.01

-0.2

ᅟSD

0.93

0.03

0.57

1.8

0.57

1.8

ᅟSeparation

2.94

ᅟReliability

0.90

ᅟRMSE

0.31

ᅟRS-MC

0.99

ᅟCronbach α

0.91