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Table 4 BAS-2 Graded Response Model IRT Properties

From: Body Appreciation Scale (BAS-2): measurement invariance across genders and item response theory examination

Item

α

β1

β2

β3

β4

1

2.09

 − 2.73

 − 1.43

 − 0.05

1.34

2

3.71

 − 1.70

 − 0.61

0.50

1.71

3

3.54

 − 2.12

 − 1.22

 − 0.11

0.89

4

5.19

 − 1.68

 − 0.66

0.27

1.23

5

1.87

 − 2.76

 − 1.33

0.11

1.54

6

4.08

 − 1.31

 − 0.33

0.52

1.41

7

2.90

 − 1.63

 − 0.51

0.40

1.41

8

2.96

 − 1.61

 − 0.46

0.48

1.54

9

3.04

 − 1.55

 − 0.61

0.27

1.32

10

3.01

 − 1.38

 − 0.46

0.41

1.27

  1. α defines the capacity of an item to discriminate between varying levels of body appreciation (θ)
  2. β represents the level of latent trait observed to endorse each item at a specific threshold
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BMC Psychology

ISSN: 2050-7283

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