Animals -- like humans -- are thought to make decisions based on the expected size and probability of rewards. A neural correlate of this behaviour has now been demonstrated by experiments in which rhesus monkeys have to switch their gaze to a particular target for a juice reward. The number of signals fired by neurons in the lateral intraparietal cortex is found to vary depending on the size of the expected reward.
- M. James Nichols
- William T. Newsome
