Statistical analysis of multi-subject fMRI data: assessment of focal activations.
A simple procedure for analyzing multi-subject functional magnetic resonance imaging (fMRI) data is proposed. In the first step, a voxel-wise t-test across standardized z-maps is performed to identify areas that are consistently activated across subjects. In the second step, for each area, individual mean z-scores are calculated and subsequently subjected to an analysis of variance. An example is provided.
Bosch
V
V
Max-Planck-Institute of Cognitive Neuroscience, Leipzig, Germany. bosch@cns.mpg.de
D000704:Analysis of Variance; D001921:Brain / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008570:Memory, Short-Term