I’m extremely biased, but to me, one of the real success* stories in neuroscience over the last (just over) two decades has been in studying reward signals. Since the seminal 1997 paper, a lot of work has gone into figuring out how the brain assigns value to outcomes.
*ugh, maybe. This isn’t a blog post about that
My PhD project looks at novel ways of eliciting valuation behaviour to study these signals, but as a key part of the modelling involved in this work, it’s important to get a handle on reinforcement learning.