I think @slatestarcodex is conflating r with r-squared here. Former -> movement in SDs, latter -> % variance.pic.twitter.com/mCrrLs5MFq
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First statistic near-verbatim from https://roundtheinkwell.files.wordpress.com/2011/10/three-way-error-analysis.pdf …, second from http://www.econ.ucsb.edu/~jon/Econ230C/HanushekRivkin.pdf …
Ah. Different results!
My point was, within a set of results, you can actually derive each from the other.
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