If you read about the Dunning-Kruger effect, it is essential to also read its' criticism, very aptly summarized here: http://www.talyarkoni.org/blog/2010/07/07/what-the-dunning-k... (posted here numerous times; the truth is, well, we all suck at heuristic self-assessment, regardless of our skill, sorry). It's always easy to write off other people as "incompetent", blame Dunning-Kruger, and just ignore what they say and think they know. A lot of physicians tend to do that, and, frankly speaking, it just comes off as arrogance and does not help confidence at all.