Table 1.

Psychometric Properties of the FCV-19S at the Item Level (n = 387)

FCV-19S Item	Factor Loadinga	Item-Total Correlation	Infit MnSq	Outfit MnSq	Difficulty	DIF Contrast Across Genderb, d	DIF Contrast Across Agec, d
I1	0.69	0.63	0.85	0.90	‒0.417	‒0.01	‒0.38
I2	0.69	0.62	0.91	0.87	‒0.003	0.06	‒0.01
I3	0.67	0.59	0.91	0.85	1.718	‒0.05	0.14
I4	0.68	0.60	0.90	0.87	‒0.031	‒0.08	0.31
I5	0.77	0.69	0.78	0.84	0.655	‒0.04	0.24
I6	0.63	0.56	0.85	0.83	1.903	‒0.20	0.14
I7	0.71	0.64	0.83	0.82	1.166	‒0.03	0.31

Notes: ^aBased on confirmatory factor analysis; ^bDIF contrast across gender = difficulty for males - difficulty for females; ^cDIF contrast across age = difficulty for older (> 34.5 years) - difficulty for younger (≤ 34.5 years); ^dDIF contrast > 0.5 indicates substantial DIF.

Abbreviations: MnSq, mean square; DIF, differential item functioning.