Table 2.

Bifactor Loadings and Model-based Statistics for Combined ASD Group

Item	Endorseda	λ G	λ CA	λ SV	h2	I-ECV
1. Sadness	52.9%	0.79	0.23	—	0.67	0.92
2. Pessimism	58.0%	0.69	0.33	—	0.59	0.81
3. Past Failure	65.4%	0.70	0.44	—	0.68	0.71
4. Loss of Pleasure	56.2%	0.85	—	−0.05	0.73	>0.99
5. Guilty Feelings	55.6%	0.65	0.41	—	0.58	0.72
6. Punishment Feelings	36.8%	0.56	0.39	—	0.47	0.68
7. Self-Dislike	52.6%	0.74	0.48	—	0.78	0.71
8. Self-Criticalness	56.8%	0.67	0.46	—	0.66	0.68
9. Suicidal Thoughts or Wishes	36.5%	0.68	0.26	—	0.53	0.87
10. Crying	35.0%	0.65	—	0.03	0.42	>0.99
11. Agitation	50.4%	0.71	—	—	0.51	>0.99
12. Loss of Interest	53.8%	0.87	—	−0.02	0.76	>0.99
13. Indecisiveness	50.1%	0.71	0.08	—	0.51	0.99
14. Worthlessness	47.7%	0.76	0.48	—	0.81	0.72
15. Loss of Energy	69.6%	0.79	—	0.47	0.84	0.74
16. Changes in Sleeping Pattern	68.4%	0.64	—	0.36	0.54	0.76
17. Irritability	47.2%	0.75	—	0.06	0.56	0.99
18. Changes in Appetite	53.6%	0.61	—	0.18	0.40	0.92
19. Concentration Difficulty	56.4%	0.74	—	0.17	0.58	0.95
20. Tiredness or Fatigue	67.1%	0.77	—	0.54	0.89	0.68
21. Loss of Interest in Sex	34.7%	0.58	—	0.13	0.35	0.95
		G	CA	SV
	ωt/ωs	0.952	0.913	0.916	ECV = 0.834
	ωH/ωHS	0.881	0.180	0.048	PUC = 52.38%

Note. Loadings and model-based statistical indices are derived from a full-information maximum likelihood confirmatory factor analysis. The equivalent graded response model parameters can be found in supplemental table S2. G = general factor. CA = cognitive-affective factor; SV = somatic-vegetative factor; h² = communality; (I-)ECV = (Item-level) explained common variance; PUC = percentage of uncontaminated correlations.

^aThe percentage of respondents with a score of “1” or greater on a given item