Figure 2.

Cross-section images of group main effects under Placebo (green) and group × drug × Pr effects (red), with parameter estimate (R–F) plots, showing key regions in which both effects are present. The cross-sections shows significant clusters (at P < 0.001, uncorrected, cluster size ≥5), superimposed on the SPM5 canonical T₁ image (http://www.fil.ion.ucl.ac.uk/spm/software/spm5/). The plots shows the mean differences in the parameter estimates for the early covariate between remembered (R) and forgotten (F) items, across subjects for each age group and drug condition, at the peak voxel of the cluster indicated by the relevant white arrow. Error bars represent the standard error of this difference.