A, Response modulation for the NAP and the four different MP changes for all intradimensional NAP–MP comparisons, averaged over 243 cases (162 neurons). B, Response modulation for the NAP and the four different MP changes for all cross-dimensional NAP–MP comparisons, averaged over 268 cases (121 neurons). C, Response modulation for the NAP and the four different MP changes for all intradimensional NAP–MP comparisons in which the basic object is a one-part silhouette, averaged over 57 cases (57 neurons). The mean percentages of image change (mean Euclidean distance) are indicated below the label of the shape variations with the mean percent change of the NAP stimuli set at 100%. Error bars indicate SEM.