Open AccessVariability in fMRI: A re‐examination of inter‐session differences
Author(s) -
Smith Stephen M.,
Beckmann Christian F.,
Ramnani Narender,
Woolrich Mark W.,
Bannister Peter R.,
Jenkinson Mark,
Matthews Paul M.,
McGonigle David J.
Publication year - 2005
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.20080
Subject(s) - session (web analytics) , preprocessor , hum , computer science , psychology , artificial intelligence , pattern recognition (psychology) , world wide web , art , performance art , art history
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. Hum. Brain Mapping 24:248–257, 2005. © 2005 Wiley‐Liss, Inc.