[id10t]

IQ != education level. Verbosity may be, certainly is related to how much of the language you are exposed to.

But people who are well read or who spend time interacting with people who are well read will have more exposure to words in different contexts and uses, and more words in general. (just hearing the words on a audio stream, etc. doesn't do the same for "integration" into your thoughts etc as reading or talking/using the words)

Also as shown by some of the examples in the "racist" SAT test, etc. your actual upbringing can expose you to different words and their meanings and usages than someone else, even if pretty much anything else is equal (IQ, income, skin tone, etc) - regional slang/meaning even though they are "real" words in the OED - differences between lunch, dinner and supper. Or a "creek", "crick", "stream" or "brook". Or what the Brits call tea - or what they call a biscuit vs. what a southern boy like me calls a biscuit.



(FWIW I think IQ is your ability to learn, and apply known information to unknown situations, extrapolate and interpret data, think in multiple dimensions, etc. not how much you actually know. I've known a lot of people who made good grades in lots of classes who might give a brick some competition in brain power... if the brick was having a bad day)