A neurotransmitter involved in multiple neural functions. Some phasic dopamine-neuron responses are consistent with reward-prediction-error signalling, and timed interventions can affect learning. This does not mean that every dopamine neuron or every timescale carries one identical scalar error.[ref]
A causal link between prediction errors, dopamine neurons and learning by Elizabeth E. Steinberg and others. Abstract and Figures 1–4: associative blocking, extinction and reward-timed dopamine-neuron stimulation
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