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jailbird
New Member
2 Posts |
 Posted - 09/26/2004 : 08:25:59
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In a recent discussion (see Topic 3185), a paragraph from my site "Self-
esteem and Intelligence" (http://self-improvement.mindfocus.net) was
quoted. The subject was the studies, made on twins reared apart, in order to
determine the influence of heredity on intelligence.
This elicited a response saying that in absence of a reference, the
number of twins involved in the studies could not be known and so the
importance of the studies could not be ascertained.
The purpose of this posting is to supply the references necessary to
anyone interested in learning more about the subject. Studies of twins
reared apart at the University of Minnesota and elsewhere can be found
in:
Plomin, R. (1997). Genetics and intelligence. In N. Colangelo & G. Davis
(Eds.), Handbook of gifted education (2nd ed.; pp. 67-74). Boston: Allyn
and Bacon.
Bouchard, T.J. Jr., LyWcen, D.T., McGue, M., Segal, N.L., & Tellegen, A.
(1990). Sources of human psycholgical differences: The Minnesota study of
twins reared apart. Science, 250, 223-228.
Pedersen. N.L.. Plomin, R. Nesselroade. J.R, & McCleam, G.E. (1992). A
quantitative genetic analysis of cognitive abilities during the second
half of the life span. Psychological Science. 3, 346-353.
For general discussions of behavior genetic methods, see:
Plomin. R., DeFries. J.C.. & McClearn (1990). Behavioral genetics: A
primer (2nd ed.). New York: Freeman.
I would also like to make clear that the purpose of my site is not to be
a scientific publication, although every care is taken to assure the
accuracy of what is published. The site's purpose is to bring
introductory information to a person browsing the Web. However, there
exists in the site a book section where that person can find the
resources to continue searching in depth.
Considering that the topic was on Eugenics, I think it is opportune to
remember that the creator of Eugenics and the initiator of twin studies
was the 19th century scientist Sir Francis Galton, who was a cousin of
the other great Victorian-age genius, Charles Darwin. Galton has a Web
site dedicated to him:
http://www.mugu.com/galton/
In that site, the following quotation can be found:
"Both the idea of a general factor of cognitive ability ... and the idea
that genetic factors might be an important source of variance in
cognitive ability have been continuously debated since they were first
systematically expounded by Galton ... . Reviews of Galton's books
published in the London Times at the time of their appearance could, if
slight changes were made, be published today."
-- Thomas Bouchard 'IQ similarity in twins reared apart: findings and
responses to critics' 1997.
Hector Castro
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BigPapaSmurf
SFN Die Hard
3192 Posts |
Posted - 09/27/2004 : 06:42:10 [Permalink]
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| Man I love this site, thanks for taking the time Hector. |
"...things I have neither seen nor experienced nor heard tell of from anybody else; things, what is more, that do not in fact exist and could not ever exist at all. So my readers must not believe a word I say." -Lucian on his book True History
"...They accept such things on faith alone, without any evidence. So if a fraudulent and cunning person who knows how to take advantage of a situation comes among them, he can make himself rich in a short time." -Lucian critical of early Christians c.166 AD From his book, De Morte Peregrini |
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astropin
SFN Regular
USA
970 Posts |
Posted - 09/27/2004 : 10:15:26 [Permalink]
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| Yes, thank you for the additional info Hector. |
I would rather face a cold reality than delude myself with comforting fantasies.
You are free to believe what you want to believe and I am free to ridicule you for it.
Atheism:
The result of an unbiased and rational search for the truth.
Infinitus est numerus stultorum |
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jailbird
New Member
2 Posts |
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Topic Locked
