Principal Feature Analysis: A Multivariate Feature Selection Method for fMRI Data
Figure 4
Distributions of voxels (with their absolute -values) selected by different feature selection methods and location of the visual areas of a single subject (S1). For each method, 310 voxels were selected and overlaid on the functional maps. (a) to (c) show the distribution of voxels selected by PFA, -statistics and searchlight (two-voxel radius, comprising 33 voxels, average absolute -value). The color linearly reflects the absolute -value of the voxels shown in (a) to (c) (see color bar on bottom). The visual areas are illustrated in (d). The slices shown in (a) to (d) are slices 12, 13, 14, 15, 16, and 17 of the 39 axial slices acquired. Visual areas are mostly on these slices.
