Table 7.

Item parameter estimates (99 % HPD) in the full gender interaction model

Item	αi	τi1	τi2	rDZ,i	rMZ,i
1	1.00a	0.96 (0.89; 1.02)	3.10 (3.00; 3.21)	0.12 (0.01; 0.22)	0.22 (0.12; 0.32)
2	1.00 (0.94; 1.07)	1.69 (1.61; 1.78)	3.37 (3.24; 3.52)	0.04 (0.00; 0.16)	0.31 (0.19; 0.42)
3	–	–	–	–	–
4	0.71 (0.66; 0.76)	1.32 (1.25; 1.39)	2.85 (2.74; 2.96)	0.09 (0.01; 0.19)	0.26 (0.16; 0.35)
5	0.52 (0.49; 0.56)	0.09 (0.05; 0.14)	1.47 (1.42; 1.53)	0.12 (0.05; 0.18)	0.31 (0.25; 0.37)
6	0.89 (0.83; 0.96)	1.87 (1.78; 1.97)	3.35 (3.21; 3.50)	0.09 (0.00; 0.22)	0.35 (0.21; 0.48)
7	1.46 (1.36; 1.56)	2.08 (1.96; 2.20)	4.27 (4.06; 4.47)	0.12 (0.00; 0.31)	0.26 (0.12; 0.40)
8	1.00 (0.93; 1.06)	0.35 (0.29; 0.42)	2.68 (2.57; 2.78)	0.04 (0.00; 0.13)	0.26 (0.18; 0.35)
9	1.04 (0.98; 1.11)	1.40 (1.32; 1.49)	3.31 (3.17; 3.44)	0.03 (0.00; 0.13)	0.36 (0.26; 0.46)
10	0.88 (0.83; 0.94)	1.33 (1.26; 1.40)	3.03 (2.92; 3.16)	0.07 (0.00; 0.18)	0.22 (0.11; 0.32)
11	0.85 (0.80; 0.91)	0.57 (0.52; 0.63)	2.44 (2.36; 2.53)	0.14 (0.05; 0.22)	0.32 (0.25; 0.40)
12	1.35 (1.27; 1.45)	1.53 (1.43; 1.64)	4.02 (3.84; 4.22)	0.08 (0.00; 0.21)	0.20 (0.07; 0.33)
13	1.15 (1.09; 1.23)	0.18 (0.11; 0.25)	2.42 (2.31; 2.52)	0.09 (0.00; 0.17)	0.23 (0.14; 0.31)

^aThis parameter has been constrained for identification purposes. In addition, item 3 was omitted from the analysis as it violated measurement invariance across gender