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. 2006 Jan 1;29(1):145-54.
doi: 10.1016/j.neuroimage.2005.07.054. Epub 2005 Oct 3.

Estimation of the intrinsic dimensionality of fMRI data

Dietmar Cordes  1 , Rajesh R Nandy
Affiliations

Estimation of the intrinsic dimensionality of fMRI data

Dietmar Cordes et al. Neuroimage. .

Abstract

A new method based on an autoregressive noise model of order 1 is introduced to the problem of detecting the number of components in fMRI data. Unlike current information-theoretic criteria like AIC, MDL, and related PPCA, which do not incorporate autocorrelations in the noise, the new method leads to more consistent estimates of the model order, as illustrated in simulated and real fMRI resting-state data.

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