This is where I disagree! I don’t think the Morrison and Berridge experiment demonstrates model-based side. It is consistent with model-based RL but is also consistent with model-free algorithms that can flexibly adapt to changing reward functions such as linear RL. Personally, I think this latter is more likely since it is such a low level response which can be modulated entirely by subcortical systems and so seems unlikely to require model-based planning to work
This is where I disagree! I don’t think the Morrison and Berridge experiment demonstrates model-based side. It is consistent with model-based RL but is also consistent with model-free algorithms that can flexibly adapt to changing reward functions such as linear RL. Personally, I think this latter is more likely since it is such a low level response which can be modulated entirely by subcortical systems and so seems unlikely to require model-based planning to work