Figure 5. Category tuning of the voxel clusters. Category tuning of the two functional subdomains identified in each scene-selective ROI. For each cluster, category tuning was taken as the mean tuning profile of all voxels within the ROI (data are aggregated across subjects and hemispheres). Tuning for 1705 categories are shown here using graphs that consist of separate trees for object (main tree, circular vertices) and action (smaller trees, square vertices) categories. To orient the reader, a subset of the categories has been labeled. The size of each vertex indicates the magnitude while its color indicates the sign (red, +; blue, −) of the category response relative to the mean overall response. Left, Responses of PPA1, RSC1, and OPA1 are strongly increased by the presence of man-made instruments, devices, vehicles, structures, roads, and locations (e.g., city, grassland), and they are weakly increased by the presence of humans. Right, Responses of PPA2, RSC2, and OPA2 are strongly increased by the presence of vehicles, roads, and traveling, and they are strongly reduced by animals, plants, natural materials, body parts, and communication.