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View Diary: Rush Limbaugh is right about Jason Richwine, Ph.D. (84 comments)

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  •  Probably using census definitions (0+ / 0-)

    Note the Risch & Tang's 2005 paper found that self identified ethnicity did correspond to genetic clusters - that also included hispanic americans, although they are of course a more diverse group.

    You could look at data like that used by Telles & Ortiz who found after 4 generations there is a significant lag in educational outcomes. They attribute environmental causes, but cognitive ability is significantly heritable so environmental and heritable factors could be involved. David C Rowe did some studies in the 90's trying to find an x-factor that was depressing scores in particular groups, but couldn't find any. The developmental processes and heritability seemed similar across groups.

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