Factor analyses of the ADNI neuropsychological battery: An examination of diagnostic and longitudinal invariance.

OBJECTIVE In the Alzheimer's Disease Neuroimaging Initiative (ADNI), cognitive function was tracked across multiple years by a comprehensive neuropsychological battery. In this study, we examined the latent structure of the ADNI battery and evaluated the invariance of that structure among diagnostic groups and over time. METHOD We used exploratory and confirmatory factor analyses to investigate the invariance of the ADNI battery's latent factor...