This is a repository for miscellaneous short things I want to post. Other people are welcome to make top-level comments here if they want. (E.g., questions for me you'd rather discuss publicly than via PM; links you think will be interesting to people in this comment section but not to LW as a whole; etc.)
Rolf Degen, summarizing part of Barbara Finlay's "The neuroscience of vision and pain":
From the paper:
Finlay's original article on the topic: "The pain of altruism".
Devoodooifying Psychology says "the best studies now suggest that the placebo effect is probably very weak and limited to controlling pain".