Identical twins grown up in the same family, discordant for piano playing: A hard nut for geneticists & behaviorists http://journals.sagepub.com/doi/abs/10.1177/1029864916649791 …pic.twitter.com/iq2haSTTV0
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I think calling non shared environment 'personal reaction to environment' would be more illuminating!
Which would tend to make it a gene-environment interaction, which it is not supposed to be.
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