Figure 1.

Beta values for subjective value and difficulty level in Experiment I. (a) The mean BOLD signal of the ventromedial prefrontal cortex (vmPFC) and striatum was significantly correlated with the subjective value. The mean BOLD signal of the left dorsolateral prefrontal cortex (dlPFC) was not significantly correlated with the subjective value. (b) The mean BOLD signal of the left dlPFC was significantly correlated with the difficulty level. The mean BOLD signal of the vmPFC and striatum were not significantly correlated with the difficulty level. *Significant at p < .05/3; n.s., not significant; error bars, SEM; SV, subjective value