Hey Will-- congratulations on the publication. It's very cool to see an algorithm reflected in the brain, and the turnaround (from idea to implementation to experiment) in... what, three years? is astonishingly fast.

On a more technical note, I was curious about whether the distribution is being approximated "properly" (in the sense of probabilities summing to one, no negative probabilities) via expectile regression. Does that hold here? I'm less than an expert on neurology so I am unsure if that would be necessary in vivo (since it's clearly not needed for good performance in silico).