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. 2013 Jun 20;8(6):e68884. doi: 10.1371/journal.pone.0068884

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This is an open-access article distributed under the terms of the Creative Commons Public Domain declaration, which stipulates that, once placed in the public domain, this work may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose.

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A. Choice options and potential outcomes for participant. B. Exemplar trial structure with sample partner cues shown during decision phase and three potential outcomes based on participant choice shown during decision phase.