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. 2018 Apr 26;9:279. doi: 10.3389/fneur.2018.00279

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Copyright © 2018 Ruitenberg, Wu, Averbeck, Chou, Koppelmans and Seidler.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Overview of the beads task. Each sequence started with an instruction screen showing the proportion of bead colors in the two urns (80/20 or 60/40 color split) and the cost for an incorrect urn choice ($10 or $0). Participants then viewed a bead color and indicated that they either chose to draw another bead ($0.25 cost) or chose an urn. Upon a draw choice, another bead of the sequence was presented. Upon an urn choice, a feedback screen was presented, which displayed whether the participant chose the correct or incorrect urn and how much money they won or lost during that sequence.