Earlier quoted context omitted.
> Russel Barkley Some of his claims are questionable. AFAIR he claims that: - ADHD has no advantages - ADHD has a negative effect on working memory - ADHD has no negative effect on intelligence Since working memory is a factor in intelligence, one of these statements must be false. His political views are also interesting. > Barkley is a right-wing libertarian. He deeply believes in "Limited government, individual ri…
> Since working memory is a factor in intelligence, one of these statements must be false. That is quite easy to reconcile: "ADHD has no negative effect on intelligence, when accounting for the impaired working memory". It is something you do all the time in psychology, you observe effects in presence or absence of other effects. Psychologists are smart enough to ask questions like "Now that we know that ADHD impairs…
Since Barkley lost his brother because of ADHD, I don't think it's impossible that he actually means that it impairs working memory, has no advantages, and does not impair intelligence. Not because he's too stupid to see the contradiction but because he doesn't want to.
Then again, it would be quite a coincidence that whatever advantages ADHD has exactly cancel out the working memory issues. I just expected an academic to use precise language (there's nothing wrong with simplifying, but to me, this does not look simplified but wrong.)