a, b, Correlation between perceptual discriminability versus neural sensitivity in IOG, pFus, and mFus faces in child (a) and adult (b) faces. Each point represents a participant, colored by age. There is a significant and positive correlation between perceptual and neural sensitivity to changes in face identity especially in pFus and mFus faces. Data are from 11 adults and 12 children, except for IOG faces, where we have data from 11 children because we were unable to localize the IOG faces in one child.