At 17:10 13/06/2007 +0100, Dave Gordon wrote:
>Martins statement is somewhat misleading.
>
>Some studies have shown that IQ scores (not intelligence) have a
>narrow heritability component of 80%, other studies have produced
>much lower estimates (circa 40%) - there is no direct evidence that
>this narrow heritability is genetic rather than
>social/cultural/environmental in origin. No one has produced any
>convincing evidence that they have found a gene or genes for IQ score.
Age Heritability
4-6 0.42
7-20 0.55
late adolescence 0.75
adults 0.80
There is plenty of (indirect) evidence for the above (several decades
of peer-reviewed research). Those who dismiss the evidence do so for
political, not scientific, reasons.
Regards
Martin
References:
GOTTFREDSON, Linda S., 1997. Mainstream Science on Intelligence: An
Editorial with 52 Signatories, History, and Bibliography.
Intelligence 24(1) 13-23.
NEISSER, Ulric, et al., 1996. Intelligence: Knowns and Unknowns.
American Psychologist, 51(2), 77-101.
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