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Variability in fMRI: a re-examination of inter-session differences.

Journal article published in 2005 by Sm Smith, Cf Beckmann, Narender Ramnani, Mw Woolrich, Pr Bannister, Mark Jenkinson ORCID, Pm Matthews ORCID, Dj McGonigle
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We revisit a previous study on inter-session variability (McGonigle et al. [2000]: Neuroimage 11:708-734), showing that contrary to one popular interpretation of the original article, inter-session variability is not necessarily high. We also highlight how evaluating variability based on thresholded single-session images alone can be misleading. Finally, we show that the use of different first-level preprocessing, time-series statistics, and registration analysis methodologies can give significantly different inter-session analysis results.