Figure 4.

Representational similarity analysis. A, Mean similarity matrices across subjects of multivariate fMRI responses in rFFA for different rotational angles, shown separately for faces and vehicles. B, We compared the empirical similarity matrices with two models: monotonic and mirror-symmetric (“mirror”) angle codes. We observed a significant correlation only for faces and only for the monotonic model (p values: exact sign-permutation tests). C, We compared the empirical similarity matrices with the same models used in B, but omitting cell (0°,0°) from the analysis. This feature lies on the axis of symmetry and is therefore uninformative regarding mirror-symmetric encoding. The trend observed in B of a correlation between our data for faces and the mirror-symmetric model is no longer apparent when ignoring this feature.