The Dunning-Kruger effect is the finding that the poorest performers are the least aware of their own incompetence.

A good supplement to this article...

http://pandawhale.com/post/60079/research-were-not-very-self-aware-especially-at-work-hbr

This seems like a good solution:

The reason for the Dunning-Kruger effect seems to be that poor performers fail to learn from their mistakes.

The proposed solution is that the incompetent should be directly told they are incompetent.

LOL.  Somehow I don't think this is going to solve it, although it's certainly worth a try.  Usually they are willfully ignorant.

This is what one on one reviews and performance reviews are for!

As Socrates once said:

“The only true wisdom is to know that you know nothing.”

But even this can go too far.

It turns out that people with real talent tend to underestimate just how good they are.

The root of this bias is that clever people tend to assume other people find things as easy as they do, when actually this is their talent shining through.

• Read on: The Worse-Than-Average Effect: When You’re Better Than You Think