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. 2011 Apr 29;6(4):e19460. doi: 10.1371/journal.pone.0019460

Figure 1. Training task and reward schedule.

Figure 1

a) Subjects performed a same/different judgment between one of two overlapping shapes on the left (designated by the color of a central cue displayed prior to each stimulus display) and a single shape presented on the right. During training each correct response was followed by a reward signal indicating a high or low monetary win. b) Arrangement of stimulus shapes into biased reward categories for one exemplar subject.