fusangite said:
Where did causation suddenly show up from?
It's not sudden at all. It's ben rather implicit in your argument in a couple of places. One weakly, the other far more strongly.
Let's take the weak one first:
I'm not saying intelligence causes a good IQ test score; I'm saying it positively correlates to one.
Take a person (person A), of average intelligence. Pick person B at random from the population. There's a probability P (since A is average, P=50%), that person B will be more intelligent than A.
Now, pick person B' from the population, based upon the fact that B' has a higher IQ than A. There's some probability P' that he will be more intelligent than A. The correlation between IQ and intelligence means that P'>P. It does not ensure B' is smarter, it only indicates it is more likely.
So, if IQ correlates to intelligence, and gamers have higher than average IQ, then the probability that they are more intelligent than average is greater than the probability that a similarly sized group picked at random will be more intelligent than average. Extending that to saying gamers *will* be more intelligent is a weak form of causation argument.
However, far more strongly:
IQ correlates to many things. Intelligence may be one. Economic and educational status are others. Saying that higher IQ indicates higher intelligence instead of the others chooses intelligence as the particular cause of the sample's higher IQ. When, statistically speaking, it may be that gamers are of lower intelligence, but generally higher educational and/or economic status, and we'd see the same elevated IQ.
Simply put - there are many possible sources of elevated IQ. You singled out one. That's an implicit causation argument.
First off, let's take IQ right out of the model. It's an unnecessary intermediate step. Literacy and numeracy competence correlate with playing RPGs; that's my case.
Same problem as with IQ. Literacy and numeracy competence may correleate with intelligence. But they also correlate with economic and educational status, among other things. So, those barriers may be selecting for intelligence. But they may be selecting us to be middle class or highly educated, something else, or a mixture of things. We cannot say which one. If we try to claim one over the others, we are making an implicit claim as to causation.