Figure 7.

Human IT and monkey IT are more similar to each other than to human judgments. (A) hIT, mIT, and human judgment RDMs compared in a second-order MDS arrangement (criterion: metric stress; distance measure: 1 – Pearson r) before (left) and after (middle) equating the proportion of non-category-related variance by adding dissimilarity noise to the hIT and judgment RDMs. Statistical inference (right, via bootstrapping the stimulus set) indicates that hIT and mIT RDMs are more similar to each other than either of them is to human judgments. (B) The same analysis applied to the predicted RDMs of the category-model (Figure 5) suggests that hIT and mIT are very similar in terms of the categorical divisions they emphasize and significantly more similar to each other in this respect than either of them is to human judgments. (C) The same analysis applied to the residual RDMs of the category-model shows a weak reflection of the category-model results: hIT and mIT appear slightly more similar to each other than either of them is to the human judgments.