Figure I.

Subjective Well-Being, Model Predictions, and Neural Activity. (A) Happiness ratings during a probabilistic reward task for two example participants. The model predicts ratings based on the past history of expectations and reward prediction errors (RPEs) resulting from those expectations. (B) BOLD activity in the ventral striatum measured by fMRI was correlated with subsequent happiness ratings, consistent with striatal representation of RPEs contributing to changes in mood. Adapted from [26].