I'd forgotten about this. It's still a good idea. Any takers?https://twitter.com/KirkegaardEmil/status/838739870352871425 …
Already did the study, more or less. https://osf.io/z8dy5/ @charlesmurray
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With just 4 codings of SIRE? I wanted a continuous variable.
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Coding 3 are continuous SIRE variables.
@charlesmurray
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Why not unstandardized coefficients? (1 percentage change in ancestry X predicts a change of Y IQ points)
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this is mostly children... age will drive large part of variance otherwisepic.twitter.com/FjLx6wRq4g
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How does that affect whether they should report unstandardized or standardized results?
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their cognitive measures aren't standardized for age already i believe
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Why would it matter? Regress the scores on age and use the residuals or include age as a covariate.
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that's basically what they're doing and they're not working with IQ scores per se
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They report beta coefficients. I'd like to see the coefficients in original units. Their g measure prolly has SD=1,
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so original coefficients would tell how many SDs one percent point change in ancestry X predicts g to change.
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