[et2o]

Most doctors are constantly learning new information. It's not just refresher courses, you have to pass frequent and comprehensive examinations to stay board-certified.

I have no idea why HN has this bias against physicians.

[kaitai]

Frequent = a test every ten years in internal medicine and some continuing education/maintenance of certification. Even that is under attack (http://knowledgeplus.nejm.org/abim-moc-petition-reveals-deba...).

Doctors are human and some are constantly learning new information while others aren't. There are a lot of pressures on them that are perhaps orthogonal to "learning new things" and "keeping up with the best evidence."

[angelbob]

Personal experience with physicians has been my primary way to gain this bias against physicians.

You could also do research on, say, Lister or checklists and get the bias that way.