While the Dunning-Kruger effect explains what happens psychologically across the whole learning curve, it is often used to refer to just the first spike, i.e., the phenomenon where low-ability people think they are high-ability, unable to recognize their own skill level (or lack thereof) in a particular area. This is really the opposite of impostor syndrome: instead of thinking they are much worse than they are, they think they are much better than they are.
