Fig. 1.

Graphical depiction of the FID task. Each trial began with a cue stipulating the amount of money or number of SPs the participants could win if they reacted correctly during the subsequent discrimination task (anticipation phase). Immediately after target presentation, participants were informed about the amount of money or number of SPs they had won during the trial and their cumulative total winnings thus far (i.e. the receipt of reward phase). The MID task used graphical depictions that showed a wallet filled with EUR 1, EUR 0.20 or EUR 0, which corresponded to the amount of money won during each trial. The FID task used pictures of a large basket filled with snacks, a small basket filled with snacks and an empty basket, depending on the number of SPs won.