Visualization of the method used to form representational similarity matrices in children. A) First, we measured the size of the FFA in every child and only selected children with 0 voxels. B) Then we consulted how many FFA voxels we found across our group of selected adults (i.e., 849 voxels). C) Next, we selected the top 849 voxels in every child (even though none of those voxels reached statistical significance) such that we had the exact same number of voxels in every participant. D) Once those voxels were selected, we created a similarity matrix in each individual participant, which we then averaged together across participants to make one child group-level matrix.