http://petapixel.com/2014/10/13/dunning-kruger-peak-photography/

The name of the peak refers to the Dunning–Kruger effect, coined by a pair of researchers at Cornell University in 1999.

Through their study, the scientists discovered that people who are unskilled at something — photography for example — are often unable to see how bad they are. Incompetent people will (1) fail to recognize that they are bad, (2) fail to recognize how good competent people are, and (3) fail to see the magnitude of their incompetence.

However, if given more training in what they’re bad at, those same people will recognize how incompetent they were (this is where people fall from the “Dunning-Kruger Peak”).