FIG 2. Averages for the reproducibility measures D, R_size, and R_overlap for same-session and intersession reproducibility for system A and system B, and intermachine reproducibility. D is the distance between the centers of the activated areas, R_size is the ratio of the volumes of activated areas, and R_overlap is the ratio of the common activated areas. R_size and R_overlap must be read from the left y axis, and D must be read from the right y axis where the order is inverted.