Fig. 5 | Nature Communications

Fig. 5

From: The cost of obtaining rewards enhances the reward prediction error signal of midbrain dopamine neurons

Fig. 5

HLC uncertain task. a The HLC uncertain task. In this task, uncertain reward cues, in which rewards were delivered 50% of the time irrespective of which cue was presented, were used. b RTs to the cost cues in the high-cost and low-cost trials. Only monkey P showed a faster RT to the LC cue than the HC cue (**P < 0.01; two-tailed paired t test; t4 = 9.0, P = 8.5 × 10−4, n = 5 for monkey P; t18 = 1.4, P = 0.19, n = 19 for monkey S). Black circles and error bars indicate mean and SEM. c RTs to the reward cues in the high-cost and low-cost trials. There was no difference in the RTs to the reward cues between the high-cost and low-cost condition (two-tailed paired t test; t4 = 0.97, P = 0.39, n = 5 for monkey P; t18 = 0.99, P = 0.39, n = 19 for monkey S)

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