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. Author manuscript; available in PMC: 2017 Aug 23.
Published in final edited form as: Nat Neurosci. 2017 Feb 23;20(3):304–313. doi: 10.1038/nn.4499

Figure 4.

Figure 4

Process for SRM. fMRI data are collected from each of m participants experiencing the same stimulus and then organized into a matrix X (voxels by time). Each matrix X is then factored using a probabilistic latent-factor model into the product of a subject-specific matrix W of k brain maps (an orthogonal basis) and a shared temporal response matrix S of size k by time. That is, for each participant: X = W S + R, where X, W, and the residuals, R (not shown), are subject-specific, and S is shared across participants.