Yes, keep digging, and help linx finding equal IQ for all races stats too. His shovel must be broken at the moment, lol, how is yours?
PS. Be creative this time and call me something new, maybe some bad names in Spanish (for my education), or look up your thesaurus or something.
Are you so foolish to think that I have nothing better to do than spend any significant portion of my time responding to obsessive people who constantly throw out half-baked ideas?...
In any case, we can start with the following research:
To preface things, early studies on IQ were found to be highly questionable methodologically. The experiments concentrated only on middle to upper class white individuals born into well educated families. Hardly what one would call a properly constructed COMPARATIVE participant field. Consequently, the percentages for hereditary determinants registered somewhat higher than environmental factors. Over time, these findings have not held up to scientific scrutiny.
One of the most telling research studies, Turkheimer et al. (2003), concentrated on the heritability (genetically inherited traits) of poverty stricken U.S. family groups. The statistical totals engendered gave clear evidence that, as regards impoverished families, 60% of the influences on childhood IQ variance can be attributed to factors of shared family environment and the genetic contributions were measured at
near zero. The results collected from affluent families were almost the opposite.
Devlin et al. (Nature 1997) concluded that shared maternal (in this case fetal) environments actually amounted to 20% of covariance recorded between twins and 5% in comparative studies of siblings. The effects of genes were found to be reduced, with two important heritability measures falling below 50%.
Bouchard and McGue (2003) reviewed a large portion of heritability / environmental IQ literature and stated the following as regards pre and postnatal "nurturing" factors:
"[Some researchers], Chipuer et al. and Loehlin conclude that the postnatal rather than the prenatal environment is most important. The Devlin et al. conclusion that prenatal environment contributes to twin IQ [simply reinforces what has been substantially revealed in studies going back to 1950.]"
A portion of the
American Psychological Associations' 1995 task force on "Intelligence and Unknowns" reads as follows:
"A common error is to assume that because something is heritable it is necessarily unchangeable...heritable traits can depend on learning, and they may be subject to other environmental effects as well. The value of heritability can change if the distribution of environments (or of genes) in the population is substantially altered. For example, an impoverished or suppressive environment could fail to support the development of a trait, and hence restrict individual variation. Differences in variation of heritability are found between developed and developing nations..."
There is much more research data buttressing the theory that environment has a highly significant - ~50%, or considerably higher in some cases - impact on IQ. I will post additional material as time permits.
Fundamentally, nowhere in the most recent research literature are the percentages 80% in favor of genetics as a determinant of IQ.
p.s. We are all waiting for your apology with respect to your treatment of Spaniards and other Iberians.