Table 3.

Fit statistics for the baseline and competing, nested models

	Goodness-of-fit indices
	X2	df	ΔX2/Δdf	p < .05	ΔNFI	CFI	RMSEA
Model 1: Baseline Model (Figure 4)	33.56	11	---	---	.88	.91	.16
Competing models evaluating absence of relationships among information processing indicators:
Model 2: Panic schema & attention bias corr. set to zero	34.62	12	−1.06/1	No	.88	.91	.15
Model 3: Panic schema & interpretation bias corr. set to zero	34.92	12	−1.36/1	No	.87	.91	.16
Model 4: Interpretation bias & attention bias corr. set to zero	33.61	12	−.05/1	No	.88	.91	.15
Competing models evaluating paths from information processing indicators to panic symptoms factor:
Model 5: Path from panic schema set to zero	38.27	12	−4.71/1	Yes	.86	.89	.17
Model 6: Path from interpretation bias set to zero	70.20	12	−36.64/1	Yes	.75	.77	.25
Model 7: Path from attention bias set to zero	158.19	12	−124.63/1	Yes	.43	.41	.39
Check that Baseline Model fit does not depend on common variance with explicit cognitive indicator:
Model 8: Baseline Model without the Anxiety Sensitivity Index	14.89	6	---	---	.89	.92	.14
Check that a similar pattern of relationships is evident when the Baseline Model is run within the panic group alone:
Model 9: Baseline Model in panic group alone	26.16	11	---	---	.72	.77	.18

Note: Δχ²/Δdf =change in chi-square and degrees of freedom relative to the baseline model; p < .05 indicates whether the alternate model is significantly different from the baseline model based on Δχ² tested on a χ² distribution with df equal to the Δdf between the models; NFI = Normed Fit Index; CFI = Comparative Fit Index; RMSEA = root-mean-square error of approximation.