Reanalysis takes apart ENIGMA #ADHD study @TheLancetPsych. Would love to hear your thoughts (ping @Neuro_Skeptic).
https://www.madinamerica.com/2017/04/lancet-psychiatry-needs-to-retract-the-adhd-enigma-study/?utm_content=buffer4467d&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer …
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I get the feeling that with the flurry this paper has cause there will be alot of errata coming
Well, since ADHDers do have lower IQ (about 9 points), this seems fine. http://psycnet.apa.org/journals/neu/18/3/543/ …
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If you control for these things, you change the question from: brain size differences bwtn ADHDers and normies to
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brain size diffs between ADHDers and normies GIVEN equal IQs. I.e. you subsample to the smarter ADHDers.
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So this paper wouldn't tell us anything.
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Kinda sorta. Depends what your precise question is. Depends on your causal model whether you want to control or not! If you think lower IQ
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is a confounder, i.e. both have same cause, then you prob want to control; but if you think lower IQ is effect of ADHD, then controlling is
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controlling for some of the indirect effects of ADHD. So, depends on your causal thinking. Both questions are relevant IMO.
End of conversation
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