[chrischen]

What's more likely, that seeing dead people and being poor lowers your IQ, or that having a low IQ means you'll end up poor?

They preselected a bunch of poor people, which means the low IQ could be explained by the fact that their existing IQ put them in this place in society along with the predisposition to cheap drug addiction.

[yusefnapora]

It seems like what's most likely is that you didn't read the article correctly. They were measuring the IQ of the children, not the parents. These children didn't 'end up' poor; they started life that way. Their IQ was then 10 to 20 points below average by the time they were four, regardless of the parents' cocaine usage. Or are you suggesting that four year olds with low IQ are responsible for their place in society and the poverty of their parents?

[chrischen]

IQ most likely has a genetic factor to it. Otherwise, evolution would be independent of IQ and our society would not have shown an increase in IQ over time (which studies have shown to be true). So no, I did not misread the article.