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1895[evol-psych] Re: Iq" genetic or environmental?

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  • H. Mark Hubey
    Dec 4, 1999
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      Irwin Silverman wrote:
      > Regarding your last point, I have argued also that traits under
      > high selection pressure (directional selection in any case) will show less
      > heritability. (see my paper on r/k theory in Ethology and Sociobiology,
      > 1992), maintaining that the high heritability figures for I.Q. reflect, if
      > anything, the lesser influence of the attributes measured by I.Q. tests in
      > hominid evolution. But again, I do not see that this bears on the

      Even if there was a large enough sample there is an additional problem.
      If I=G+E is used when the correct form should have been I=G*E, then
      (1) the heritability coefficient does not measure the contribution of
      G but rather that of E, and (2) both G and E have to be measured on a
      ratio scale.

      This can be seen clearly in the last section (conclusion) of my paper
      the latest version of which can be found on my site.


      M. Hubey
      Dept of Computer Science, Montclair State University
      hubeyh@... http://www.csam.montclair.edu/~hubey
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