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. 2014 Nov 5;369(1655):20130473. doi: 10.1098/rstb.2013.0473

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© 2014 The Author(s) Published by the Royal Society. All rights reserved.

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Figure 1. — Task illustration. For both choice trials (left) and neutral no-choice trials (right) one trial of the task consists of four phases. (a,e) Intertrial interval (ITI) of 2–9 s uniformly distributed. (b) Choice(s) displayed on screen for maximum 2 s. (c) Participants make their choice and the choice is displayed for 2.5 s. (d) The outcome of the trial is displayed for 1 s with the winning amount in euros and a picture of either euro coins (win), euro coins crossed out (no win) or a scrambled image (no-choice trials). (2-Reaction time) (2-RT) seconds are added to the ITI to ensure mean trial time is 11 s. One block of trials consists of 72 choice trials and 24 no-choice trials totalling 17.6 min. Participants complete three blocks of trials. (Online version in colour.)