Table 4.

Estimates of Fixed Effects for Items in the Descriptive IRTree Model.

Node-2: Extremity (low trait)	Item	${\beta }_{\mathrm{extremity}\left(\mathrm{low}\mathrm{trait}\right):\mathrm{item}}$	SE	p
	Item 1	−0.877	0.443	.048
	Item 2	−1.164	0.617	.059
	Item 3	−1.646	0.356	<.001
	Item 4	−2.302	0.383	<.001
	Item 5	−1.657	0.368	<.001
	Item 6	−3.173	0.462	<.001
	Item 7	−2.676	0.377	<.001
	Item 8	−1.901	0.204	<.001
	Item 9	−2.751	0.294	<.001
	Item 10	−2.424	0.326	<.001
Node-3: Extremity (high trait)	Item	${\beta }_{\mathrm{extremity}\left(\mathrm{high}\mathrm{trait}\right):\mathrm{item}}$	SE	p
	Item 1	0.925	0.099	<.001
	Item 2	0.228	0.097	.019
	Item 3	0.966	0.100	<.001
	Item 4	−0.682	0.099	<.001
	Item 5	0.499	0.099	<.001
	Item 6	−1.143	0.101	<.001
	Item 7	−1.151	0.101	<.001
	Item 8	−0.991	0.107	<.001
	Item 9	−0.388	0.102	<.001
	Item 10	0.647	0.101	<.001

Note. IRTree = item response tree; SE = standard error. Results of Node-1 are not reported. Negatively keyed items are underlined.