Learning Reward Uncertainty in the Basal Ganglia
Fig 10
Comparison of the behavior of different models (labelled above columns of panels) in the Japanese letter learning task.
The top panels show the weights at the end of the simulation, and the bottom panels the probability of choosing A and avoiding B (computed from Eq 6). At the start of each simulation V, G and N were initialized at 0.1, and we set α = β = 0.1. The parameters of the choice rule to were set to a = b = 2 during training, while during test they were set to a = 4, b = 0 in the simulated on medication condition, and to a = 0, b = 4 in the simulated off medication condition. For each of the models, 100 simulations were run, with 100 learning trials each, and error bars show standard error across simulations.