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Table 3 Parameters of the items of the GRM models for the dimensions of FACES III

From: Evaluation of the psychometric properties of the family adaptability and cohesion scale (FACES III) through item response theory models in students from Chile and Colombia

Dimension

Item

Item Parameter

Item fit indices

a

b1

b2

b3

b4

S_X2

RMSEA

p-value

Cohesion

1

1.58

-4.13

-2.85

-1.48

− 0.07

42.190

0.020

0.188

19

1.55

-2.80

-1.88

-1.04

0.09

50.109

0.000

0.549

5

1.67

-3.64

-2.63

-1.49

− 0.24

47.390

0.029

0.050

17

1.57

-2.50

-1.41

− 0.14

0.97

60.220

0.027

0.052

8

2.11

-2.54

-1.54

− 0.54

0.41

36.062

0.000

0.689

13

2.06

-3.31

-2.57

-1.87

− 0.63

34.696

0.000

0.483

4

1.31

-3.24

-2.28

− 0.83

0.61

52.549

0.000

0.492

11

2.46

-2.40

-1.34

− 0.39

0.61

37.389

0.005

0.451

10

1.66

-2.88

-2.09

-1.00

0.02

41.462

0.000

0.736

15

2.23

-2.50

-1.50

− 0.51

0.68

40.485

0.005

0.449

Adaptability

7

2.18

-2.51

-1.71

− 0.84

0.43

44.79

0.013

0.316

12

1.79

-2.98

-2.20

− 0.88

0.33

48.90

0.019

0.186

2

1.18

-3.11

-2.04

− 0.54

0.99

61.30

0.016

0.231

16

1.92

-2.66

-1.78

− 0.63

0.45

42.39

0.000

0.736

6

2.01

-2.37

-1.56

− 0.54

0.59

52.42

0.012

0.343

18

1.61

-2.06

-1.39

− 0.23

0.88

45.71

0.000

0.810

14

1.89

-3.34

-1.89

− 0.85

0.48

36.90

0.000

0.799

3

1.14

-4.09

-2.87

-1.52

0.24

69.50

0.023

0.089

20

1.88

-2.50

-1.42

− 0.46

0.61

49.29

0.007

0.421

9

1.74

-3.35

-2.76

-1.73

− 0.28

46.69

0.027

0.072

  1. Note. a = discrimination parameters; b = difficulty parameters