FIGURE 26.

Neuronal value coding by monkey dopamine neurons. Monotonically increasing responses to increasing expected value (EV), irrespective of individual probability-magnitude combinations. EVs (right) are from 5 binary probability distributions with different probabilities and magnitudes of juice reward indicated at left. Population average from 55 dopamine neurons. Note that these responses do not suggest specific coding of EV as opposed to expected utility (EU), as at the time this distinction was not made experimentally. [From Tobler et al. (598).]