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Psychology: Research and Review

Table 4 Results of the estimation of item parameters in the K10 based on the IRT

From: Cross-cultural adaptation and psychometric properties of the Kessler Distress Scale (K10): an application of the rating scale model

Items

b

Infit

Outfit

Corr

Reliability

K3

1.00

0.88

0.80

0.72

0.87

K6

0.55

1.18

1.14

0.66

K10

0.46

1.31

1.19

0.69

K9

0.44

0.70

0.68

0.78

K4

0.19

1.26

1.34

0.64

K7

−0.07

0.71

0.70

0.79

K8

−0.41

1.32

1.30

0.67

K1

−0.46

1.12

1.15

0.68

K5

−0.81

0.87

0.92

0.71

K2

−0.89

0.67

0.69

0.76

M

0.00

1.00

0.99

  

SD

0.60

0.25

0.25

  
  1. NB: items are shown in decreasing order of difficulty;
  2. b difficulty of the item, Corr item-theta correlation (trait intensity level estimated by the model)