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Table 3 Estimation of threshold parameters for all ASQ:SEa binary items as a function of the social emotional trait among three-year-old boys (n = 3719) and girls (n = 3460). Ranked from lowest to highest

From: Social-emotional problems among Swedish three-year-olds: an Item Response Theory analysis of the Ages and Stages Questionnaires: Social-Emotional

ASQ:SEa items

Threshold parameter

95% Confidence Interval

Discrimination

0.99

(0.96–1.01)

20

0.36

(0.31–0.42)

11

0.48

(0.42–0.54)

18

0.77

(0.71–0.84)

19

0.79

(0.73–0.85)

12

0.93

(0.87–1.00)

7

1.02

(0.95–1.08)

14

1.08

(1.02–1.15)

4

1.13

(1.06–1.19)

25

1.21

(1.14–1.27)

6

1.67

(1.59–1.74)

21

1.76

(1.68–1.84)

29

1.79

(1.71–1.87)

8

1.92

(1.84–2.00)

23

2.33

(2.24–2.43)

25

2.43

(2.33–2.53)

15

2.43

(2.34–2.53)

2

2.53

(2.43–2.63)

28

2.81

(2.70–2.92)

5

2.86

(2.75–2.98)

13

2.92

(2.80–3.03)

27

3.07

(2.95–3.19)

1

3.25

(3.12–3.37)

26

3.31

(3.17–3.44)

31

3.45

(3.31–3.59)

17

3.59

(3.44–3.73)

3

3.94

(3.78–4.11)

22

4.36

(4.16–4.55)

9

4.53

(4.32–4.74)

10

4.82

(4.59–5.06)

16

5.01

(4.75–5.26)

30

5.7

(5.36–6.04)

  1. aThe first edition of the Ages and Stages Questionnaires: Social-Emotional for 36-month interval