sentences:  This work, carried out in collaboration with Peter Dayan and Terry Sejnowski, focused on prediction as a guiding concept in terms of synaptic learning rules that would underlie learning, valuation, and choice.This work proposed a modification to the then dominant idea of Hebbian or correlational learning.In particular, it was shown that dopamine neurons and homologous octopaminergic neurons in bees display a reward prediction error signal exactly consonant with the temporal difference error signal familiar from models of conditioning proposed by Sutton and Barto during the 1980s.