Hippocampal activity correlates with trial-by-trial classifier decision value. A, SPM t map of the parametric modulation of classifier decision value overlaid on a structural template. The map is thresholded at p < 0.05, cluster-corrected, with cluster size of >50 voxels. B, Bar plots show effect size for the hippocampal peak voxel in A, binned by absolute classifier decision value in visual cortex (see Materials and Methods). Error bars indicate ± 1 SEM.