I ADORE this:
Kruger and Dunning are interested in whether, below a certain level basic competence, it becomes very difficult for people to improve their skills - because they are, in fact, too incompetent to be able to tell the difference between competence and incompetence in the first place.
OMG---words can't express the love I have for that. Love, utter, utter, love. *love*
here's some more linkage:
Plenty of individual people have wonderful posts on their journals/blogs, you'll have to find them by following links :-)