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. 2019 May 8;2019(1):niz004. doi: 10.1093/nc/niz004

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© The Author(s) 2019. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Schematic representation of the task structure, showing a typical sequence of trials: people were faced with both rating (blue) and choice (orange) trials. During rating trials, they observed outcomes randomly from one arm of the two-armed bandit, represented as squares. Participants then rated the average value of this arm and their confidence in this value-belief estimate on a 2D grid. During choice trials, participants freely chose one arm of the bandit, rated their confidence in this decision and were then shown the reward. In Experiment 1, 75% of trials were rating trials and 25% trials were choice trials, with both trial types intermixed randomly. In Experiment 2, these proportions were reversed.