ABSTRACT: Gray matter cortical thickness (CT) is related to perceptual abilities. The fusiform face area (FFA) (Kanwisher et al., The Journal of Neuroscience: The Official Journal of the Society for Neuroscience, 17, 4302-4311, 1997) in the inferior temporal lobe is defined by its face selectivity, and the CT of the FFA correlates with the ability to make difficult visual decisions (Bi et al., Current Biology, 24, 222-227, 2014; McGugin et al., Journal of Cognitive Neuroscience, 28, 282-294, 2016, Journal of Cognitive Neuroscience, 32, 1316-1329, 2020). In McGugin et al. Journal of Cognitive Neuroscience, 32, 1316-1329, (2020), individuals with better face recognition had relatively thinner FFAs, whereas those with better car recognition had thicker FFAs. This opposite correlation effect (OCE) for f
