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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