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. 2020 May 8;11:2313. doi: 10.1038/s41467-020-15146-7

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — a Example sequence of visual stimuli (left) representing a random walk on an underlying transition network (right). b For each stimulus, subjects are asked to respond by pressing a combination of one or two buttons on a keyboard. c Each of the 15 possible button combinations corresponds to a node in the transition network. We only consider networks with nodes of uniform degree k = 4 and edges with uniform transition probability 0.25. d Subjects were asked to respond to sequences of 1500 such nodes drawn from two different transition architectures: a modular graph (left) and a lattice graph (right). e Average reaction times for the different button combinations, where the diagonal elements represent single-button presses and the off-diagonal elements represent two-button presses. f Average reaction times as a function of trial number, characterized by a steep drop-off in the first 500 trials followed by a gradual decline in the remaining 1000 trials. In e and f, averages are taken over responses during random walks on the modular and lattice graphs. Source data are provided as a Source Data file.