1. Dopaminergic firing is correlated _________ to the magnitude of the reward.
a) positively; as the size of the reward increases, so does the firing rate
b) negatively; as the size of the reward increases, the firing rate decreases
c) positively and negatively; depending on the type of reward, the firing rate may increase or decrease with an increase in the reward size
d) none of the above; there is no correlation between reward magnitude and dopaminergic firing
Please explain
2. What is the formula of the prediction error (PE)?
a) PE = learning rate * reward occurred
b) PE = reward occurred – reward (at t-1)
c) PE = reward occurred – reward expected
d) PE = reward occurred – reward of unchosen option