Hedging your bets by learning reward correlations in the human brain.

The weights estimated by this model match subjects' behavior very well, as shown by a comparison of model predictions and subjects' actual choices ( Figure 2 B) with the regression of actual observed weights on model predicted weights being highly significant in every individual subject (p < 0.0001; average R 2 [standard coefficient of determination] across subjects = 0.77; see Table S1 available online).

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