Figure 4.

Neuronal encoding of variables related to the choice outcome. All conventions are as in Fig. 3a. a, Neuronal response encoding chosen value (preoutcome time window). In this session, the animal was very risk-seeking (α = 0.72). The firing rate increased with increasing quantities of the chosen juice regardless of whether the animal chose juice A (circles) or juice B (diamonds). For given juice type and juice quantity, the firing rate increased with increasing probability. b. Neuronal response encoding chosen value, negative encoding (postoffer time window). c. Neuronal response encoding weighted choice B (preoutcome time window). The firing rate was lowest when the animal chose juice A (circles). When the animal chose juice B, the firing rate was modulated by the probability associated with juice B. d, Neuronal response encoding risky choice (preoutcome time window). The firing rate was approximately binary, high/low whenever the monkey chose a risky/safe option (p < 1). It did not depend on the type and quantity of the chosen juice.