Results of within-group effects on BOLD response associated with mental rotation complexity are shown in (a) AUTc, (b) TYP, (c) AUTp and (d) AUTnp (uncorrected voxel-wise cluster-forming threshold p <.001 and FDR-corrected cluster-level p <.05, k = 100). Brain activation is shown for the AUTc group (red), the TYP group (yellow), the AUTp group (blue) and the AUTnp group (green). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)