Final answer:
When VTA DA neurons are inhibited, the probability of repeating the previous choice decreases, due to the dopaminergic system's role in encoding reward prediction errors and reinforcing behaviors.
Step-by-step explanation:
The Ventral Tegmental Area (VTA) dopaminergic neurons play a crucial role in the reward circuitry of the brain. When VTA dopaminergic (DA) neurons are inhibited, the probability of repeating the previous choice decreases. This is because dopamine release from these neurons is often associated with the encoding of reward prediction errors. When an outcome is better than expected, dopamine release increases, which can affect decision-making processes. Conversely, inhibition of these neurons means that the positive reinforcement signal that would encourage repeating action is lessened, which ultimately reduces the likelihood of repeating the choice.