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Lumifer comments on Open Thread May 23 - May 29, 2016 - Less Wrong Discussion
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Thank you.
One thing I found I wished for and didn't find, though, is a description of the underlying mechanics. You described what and why, but not how. Do you think that can be usefully expressed in a couple of paragraphs or it's too complicated for that? The article already assumes a fair amount of background knowledge.
I'm not sure it can. I've read many different descriptions and looked at the math, but it's a very different approach from the twin-based variance components estimation procedures I've managed to beat some understanding into my head of, and while I've worked with multilevel models & random effects in other contexts, the verbal descriptions of using multilevel models for estimating heritability just don't make sense to me. (Judging from Visscher's commentary paper, I may not be the only one having this problem.) I think my understanding of linear models and matrices may be too weak for it to click for me.