Table 3.

Exploratory factor analysis (EFA) based on the polychoric matrix using principal axis and varimax rotation.

Item	Factor 4	Factor 1	Factor 3	Factor 2	h2	u2	com
5	0.64				0.49	0.50	1.41
1	0.60				0.59	0.40	2.15
3	0.47				0.33	0.66	2.01
4	0.36				0.29	0.71	2.83
2	0.31				0.19	0.81	3.07
16	0.29				0.13	0.87	2.04
13		0.79			0.63	0.37	1.03
15		0.46			0.44	0.56	2.86
8		0.43			0.38	0.61	2.85
14		0.41			0.32	0.68	2.80
6			0.93		0.88	0.12	1.03
7			0.35		0.21	0.79	2.38
9			0.27		0.18	0.82	3.40
10				0.85	0.75	0.25	1.09
11				0.57	0.44	0.56	1.71
12				0.28	0.12	0.88	2.30
Variance	0.11	0.10	0.10	0.09			Mean = 2.2

h² = communality of the item; u² = uniqueness of the item; com = Hoffmann’s item of complexity. Weights lower than 0.25 are hidden; boldface represent correct item-factor weight.