Figure 4.

Grandmaternal versus paternal brain activation. Regions where grandmothers have stronger activation than fathers for the contrast own child (or grandchild)—unknown child (or grandchild) are shown in yellow. Regions where fathers have stronger activation are shown in blue. Results are thresholded using clusters determined by Z > 3.1 (voxelwise 1-tailed p < 0.001), and a FWE-corrected cluster significance threshold of p < 0.05 was applied to the suprathreshold clusters. Bottom: plot of contrast values within the peak voxel of the dACC for fathers and grandmothers. (Online version in colour.)