WORDSUM is a measure of vocabulary ( see sample items here) where the test taker has to select which of a set of words has the most similar meaning to a target word.There's been some discussion of how the test is strongly correlated with IQ.However, I think that it wouldn't be that difficult to lower the correlation between vocabulary and IQ, if you got higher-IQ people to study less vocabulary words, or lower-IQ people to study high vocabulary words. It seems like an accident of history (although some accidents of history do have high probabilities of happening).Thus, what hidden latent variables could be responsible for the high correlation between WORDSUM and IQ?
What hidden latent variables could be responsible for the high correlation between WORDSUM and IQ?
intelligence