This is well-documented in the literature under the name Dunning-Kruger Effect.  It is different from Imposter Syndrome in that the latter implies pathology.  You can learn more about research into self-appraisal and skill here: <a href="http://en.wikipedia.org/wiki/Dunning–Kruger_effect" rel="nofollow">http://en.wikipedia.org/wiki/Dunning–Kruger_effect</a>