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Table 5 Discrimination and difficulty parameters for scale items (n = 811)

From: Psychometric properties of the Coronavirus Anxiety Scale based on Classical Test Theory (CTT) and Item Response Theory (IRT) models among Chinese front-line healthcare workers

Item

a

β1

β2

β3

β4

Item 1

2.72

1.68

2.48

2.83

2.43

Item 2

2.08

1.13

2.49

2.20

2.29

Item 3

3.85

1.76

2.53

2.51

2.64

Item 4

3.24

1.39

2.49

2.62

2.58

Item 5

3.82

1.75

2.51

2.66

2.58

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BMC Psychology

ISSN: 2050-7283

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