DFK wrote:
While acknowledging I'm not real expert on intelligence metrics, I'm curious as to why you think vocabulary has anything to do with it? Vocabulary is knowledge, not comprehension or deduction. Seems to be a parallel measurement.
I don't really know much about it, either, I just know that total vocabulary size correlates very well with general IQ -- practically better than anything else that we can measure, in fact. So do SAT scores, That's not terribly surprising given that half of the SAT is essentially a vocabulary test.
Why this is true is not exactly understood. There are probably several partial explanations.
1) Generally speaking, intelligent people read more. They have larger vocabularies simply because they've been exposed to a larger written corpus.
2) Vocabulary isn't strictly a function of knowledge and memory. Words represent ideas, so knowing a word entails understanding the idea that it represents. As words become increasingly more esoteric and nuanced in their meaning, they become more difficult to learn and use correctly.
3) Similarly, in synonym-laden languages, much of the process of learning vocabulary is differential. Take words like: hate, anger, rage, spite, malice, strife. The ideas are all related, but they have different (sometimes only
slightly different) meanings or connotations. When you first learn what a word like "malice" means, you probably learn it in terms of the simpler words you already know. It's
like spite, but
different. The learning process thus involves relationships between ideas, and your ability to compare and contrast them.
4) Vocabulary has structure. Think of all the Greek and Latin prefixes, suffixes, and other component elements of English vocabulary. Learning a larger number of words is easier if you can see this underlying structure and how words relate to one another structurally (ex. pathetic, pathos, sympathetic, pathological, etc.)
5) It may be that the ability to retain and access information may not be
entirely unrelated to measurable intelligence in the first place.