Research map / Reinforcement learning / Visual and representation RL
Action-modulated midbrain dopamine activity arises from distributed control policies
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Measured effects reported in the paper
| What was changed | Where | Measured | Effect |
|---|---|---|---|
| add action surprise term to dopamine signal (ablation) | actor-critic basal ganglia model · navigation and two-joint tasks, partial external control | task performance (learning speed and final) | Helped |
| add action surprise term to dopamine signal (ablation) | actor-critic basal ganglia model · navigation and two-joint tasks, fully off-policy | task performance (learning speed and final) | Helped |
| add efferent copy of the taken action to RPE-only model (ablation) | RPE-only actor-critic · fully off-policy learning | task performance (learning speed and final) | Hurt |
| add action surprise term (ablation) | RPE-only actor-critic · fully on-policy learning | task performance (learning speed and final) | No clear effect |
| weight action surprise more strongly in actor than critic (8x) (ablation) | action surprise model · expert external controller, partial control and off-policy | task performance (learning speed and final) | Helped |
| learn the action surprise coefficient online instead of tuning it (ablation) | action surprise model · fully off-policy learning | task performance (learning speed and final) | No clear effect |
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