Strategic goal states associated with countermeasures. A, Left, Univariate contrast reveals brain regions engaged during attempts to conceal memory by shifting attention to novel perceptual aspects of the face stimuli. Right, Complementary contrast reveals brain regions involved in concealing novelty, by generating memories in response to novel faces. B, Plots of memory decoding for classifiers trained on patterns from concealed memory trials. Green plots reveal above-chance decoding when tested on concealed trials (CM→CM, green) but reduced to chance levels when tested on explicit recognition data (EX→CM, blue). AUC values are plotted for each participant's data using unique color identifiers, with lines connecting each participant's classification performance and plot-width depicting participant density in that performance range. C, Maps indicating the diagnostic value that each voxel provides the concealed memory-trained classifier (importance maps) in biasing a hit choice (warm colors) or a CR choice (cool colors). CM→CM, Classifier trained on concealed trials, tested on held-out concealed trials (4-fold cross-validation); CM→EX, classifier trained on concealed trials, tested on explicit trials.