Table 2.

Fit indices of the unrestricted and restricted models.

Model fit index	Unrestricted 6-factor model (Impostorism as construct of its own)	Restricted 5-factor model A (Impostorism = Concern over mistakes)	Restricted 5-factor model B (Impostorism = Neuroticism)	Restricted 5-factor model C (Impostorism = Depression)	Restricted 5-factor model D (Impostorism = Apprehension)	Restricted 5-factor model E (Impostorism = Core self-evaluations)
RMSEA	0.053	0.064	0.085	0.092	0.090	0.071
SRMR	0.060	0.064	0.070	0.070	0.072	0.084
CFI	0.948	0.921	0.863	0.837	0.846	0.903
TLI	0.937	0.907	0.835	0.806	0.817	0.885
AIC	6965.052	7007.188	7111.908	7155.908	7140.281	7039.205

Model A, common latent factor for impostor phenomenon and concern over mistakes; Model B, common latent factor for impostor phenomenon and neuroticism; Model C, common latent factor for impostor phenomenon and depression; Model D, common latent factor for impostor phenomenon and apprehension; Model E, common latent factor for impostor phenomenon and core self-evaluations; RSMEA, Root Mean Square Error of Approximation; SRMR, Standardized Root Mean Error Residual; CFI, Comparative Fit Index; TLI, Tucker Lewis Index; AIC, Aikaike Information Criterion.