Table 2.

Standardized factor loadings, confirmatory factor analysis fit statistics of competing models for Intolerance of Uncertainty Scale–12, and variance partitioning based on bifactor model.

		Correlated factors model		Bifactor model
Item	Unidimensional model	Inhibitory	Prospective	General	Inhibitory	Prospective	h²	u²
3. Uncertainty keeps me from living a full life.	.75	.78		.72	.24		.58	.42
6. When it is time to act, uncertainty paralyzes me.	.84	.86		.71	.55		.81	.19
7. When I am uncertain I can’t function very well.	.82	.85		.70	.56		.80	.20
10. The smallest doubt can stop me from acting.	.75	.77		.68	.38		.61	.39
12. I must get away from all uncertain situations.	.81	.85		.80	.17		.67	.33
1. Unforeseen events upset me greatly.	.74		.76	.77		−.17	.59	.41
2. It frustrates me not having all the information I need.	.73		.75	.75		.02	.56	.44
4. One should always look ahead so as to avoid surprises.	.71		.73	.73		.05	.53	.47
5. A small unforeseen event can spoil everything, even with the best of planning.	.75		.77	.78		−.12	.61	.39
8. I always want to know what the future has in store for me.	.67		.68	.68		.07	.46	.54
9. I can’t stand being taken by surprise.	.75		.77	.76		.06	.58	.42
11. I should be able to organize everything in advance.	.73		.75	.75		.66	.56	.44
WLSMV χ²	464.52	308.78^*			158.28^*
df	54	53			42
CFI	0.96	0.97			0.99
RMSEA [90% CI]	.11 [.10, .12]	.09 [.07, .10]			.06 [.05, .07]
WRMR	1.51	1.20			0.80
% Total variance (bifactor model)				47.40	6.60	5.00	Error = 41.00
% Common variance (bifactor model)				80.30	11.20	8.50
Coefficient omega				ω_h = .88	ω_s = .20	ω_s = .03

Note. N = 663. h² = communality; u² = uniqueness; WLSMV = weighted least squares means and variance adjusted χ²; df = degrees of freedom; CFI = robust comparative fit index; RMSEA = root mean square error of approximation; CI = confidence interval; WRMR = weighted root mean square residual; ω_h = omega hierarchical; ω_s = omega subscale.

Statistically different (p < .001) from previous model. In the correlated factors model, the correlation between the factors was r = 88.