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Table 5 Items' and scale assessment of scalability (Loevinger's H coefficient), and checks for violation of monotonicity and double monotonicity assumptions (nonintersections of Item Step Response Functions).

From: Revisiting the dimensional structure of the Edinburgh Postnatal Depression Scale (EPDS): empirical evidence for a general factor

  

Monotonicity

Double monotonicity

Item

H

No. of violations a

Criteria b

No. of violations a

Criteria b

i1

.4234

0

 

2 (.0010)

37

i2

.4086

0

 

3 (.0015)

46

i3

.3770

0

 

2 (.0010)

35

i4

.3605

1 (.0222)

13

12 (.0062)

82

i5

.4019

0

 

2 (.0010)

34

i6

.3880

1 (.0159)

11

4 (.0021)

38

i7

.4881

0

 

3 (.0015)

34

i8

.4673

0

 

9 (.0046)

70

i9

.4775

0

 

7 (.0036)

62

i10

.4201

0

 

0

 

Total (scale)

.4208

4 (.0039)

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  1. a See text for explanation. In brackets: proportion of violation vis-à-vis all possible violations regarding active pairs. See Molenaar, Sijtsma & Boer [52] and Hardouin, Bonnaud-Antignac & Sebille [51] for details.
  2. b See Hardouin, Bonnaud-Antignac & Sebille [51], equation 5 on page 39.