Skip to main content

Table 4 Parameter estimates for the MIRT model

From: A 13-item Health of the Nation Outcome Scale (HoNOS-13): validation by item response theory (IRT) in patients with substance use disorder

Item no.

Discrimination (slope)

Severity (threshold)

a1

a2

b1

b2

b3

b4

Item 1

0.85

 

0.54

1.65

3.38

5.22

Item 2

0.77

 

1.51

2.59

3.54

4.76

Item 3

1.16

 

− 3.02

− 2.57

− 1.86

− 0.02

Item 4

0.70

 

0.77

2.35

4.71

7.89

Item 5

0.33

 

0.55

2.53

6.10

10.97

Item 6

0.57

 

2.11

3.33

4.61

6.33

Item 7

0.78

 

− 2.80

− 1.46

0.74

3.15

Item 8

0.99

 

− 1.65

− 0.87

1.01

2.99

Item 9

 

1.90

− 1.07

− 0.12

0.95

2.24

Item 10

 

2.73

− 0.88

− 0.33

0.66

1.74

Item 11

 

1.75

− 0.91

− 0.19

0.78

1.86

Item 12

 

2.16

− 1.54

− 0.76

0.41

1.59

Item 13

1.17

 

− 0.14

0.47

1.48

2.64

Back to article page

Addiction Science & Clinical Practice

ISSN: 1940-0640