Table 4.

Overall item difficulty and discrimination estimates for homes (2-year sample) based on the bifactor generalized partial credit model.

	Substantive dimension		Method dimensions
			Positively phrased	Negatively phrased
Item	Difficulty	Discrimination	Discrimination	Discrimination
Arnett8	0.174	2.084	0.629
Arnett7	0.169	1.778	0.948
Arnett24	−0.005	0.895	1.748
Arnett18	−0.206	1.584	2.778
Arnett25	−0.222	2.315	0.598
Arnett19	−0.226	2.444	1.153
Arnett11	−0.231	3.819	0.658
Arnett14	−0.403	4.727	0.712
Arnett3	−0.631	3.309	0.660
Arnett6	−0.688	4.419	0.250
Arnett16	−0.887	2.298	0.897
Arnett1	−0.952	3.949	0.429
Arnett21 (R)	−0.974	2.889		0.520
Arnett20 (R)	−1.017	9.311		8.102
Arnett15 (R)	−1.045	4.528		3.493
Arnett12 (R)	−1.069	2.818		2.574
Arnett13 (R)	−1.082	1.385		0.166
Arnett10 (R)	−1.128	3.547		2.876
Arnett5 (R)	−1.179	2.111		0.502
Arnett26 (R)	−1.187	3.775		2.831
Arnett9 (R)	−1.197	2.467		1.906
Arnett23 (R)	−1.251	1.592		0.482
Arnett22 (R)	−1.263	1.995		1.409
Arnett2 (R)	−1.311	4.309		3.908
Arnett17 (R)	−1.522	3.480		2.767
Arnett4 (R)	−1.893	0.598		1.030

Note. n = 750. Items are sorted by item difficulty estimates. (R) indicates the item was reverse scored.