Fig 9. Hierarchy discovery is sensitive to the task distribution.

A. (Left) graph used in experiment one with no topological community structure. Colors represent clusters favored by the training protocol (right). Numbers serve as node identifiers and were not shown to participants. “Rand” denotes a node that is randomly chosen on each trial. (middle) trial instruction (top) and screenshot from the starting state (bottom). B. Results from experiment one showing that, on the test trial, participants were more likely to go to state 5 than to state 7, indicating a preference for the route with fewer cluster boundaries. Dashed line is chance. Error bars are s.e.m. (87 participants) C. Results from simulations showing that our model also preferred the transition to state 5. Notation as in B.