I also hadn't heard "sesquipedalian" used as a noun before. I only remembered it as a word used to describe other long words :p
It looks like Wiktionary has some meanings listed that the Google dictionary doesn't, which is interesting.
The authors of the paper explain the effect well here:
And if you think about it, it really isn't that irrational for one to judge their performance as being relatively close to the mean if they don't have much else to go off of when rendering an estimate. But I think there's also some bias...
I think that is generally true, anecdotally at least. And it should be noted that those figures I posted are for reasoning tests rather than pure knowledge tests, so perhaps people take different approaches to estimating their own level of competence in a domain of knowledge versus in reasoning...
I don't know which words to change 😫
Though I can try to answer any questions about things that seem unclear, but I definitely ain't an expert. Unfortunately my user title is apt, lol. I haven't read much of the original paper at all.
Dunning-Kruger?
I've actually thought about that recently, and the popular "Dunning-Kruger" illustrations don't actually represent the data published by Dunning and Kruger. I think the biggest takeaway from the actual figures that I've seen is that the least able individuals seem to primarily...
Another pet peeve that may have already been mentioned: people automatically assuming that the things they hear from their friends and family are true. That one has genuinely angered me at times.