Contrast codes are an implementation detail

from blog Scattered Thoughts, | ↗ original
I found contrast codes really confusing on first contact. In hindsight, this is because they are typically presented as being part of the model, but it seems much more ergonomic to me to consider them part of the inference algorithm, as I'll explain here. If you haven't encountered contrast codes before - good. Stay there. You are not missing out. If you have encountered contrast codes...