@KirkegaardEmil Isn't all this due to a restriction of range? Most of the variance has been discarded bc MZ twins so similar.
E2 IQ variance lacks predictive validity. Mostly noise or mostly not measuring GCA? http://pepsic.bvsalud.org/pdf/tp/v20n1/v20n1a04.pdf …pic.twitter.com/w7OliYgeDg
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@JamesPsychol 1) SD of difference scores is 9.5 so it is not that restricted. 2) Look at the beta signs, many are in the wrong direction. -
@KirkegaardEmil Fine, will put it in the in-tray
End of conversation
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