[throwaway2016a]

You raise a valid concern I don't have a good answer for you.

I've interviewed people with some pretty severe anxiety who have passed it and some who accepted offers. But that is not to say there wasn't someone weeded out that shouldn't have been.

Although for the people who failed the coding part of it I'd say they definitely behaved more overly confident than anxious.

Edit: with that said I have some experience successfully teaching programming to people with disabilities (in a university setting) which probably makes me a fair amount more qualified than many other higher managers. But again, there are no guarantees.