[xmca] Class matters

From: Mike Cole (lchcmike@gmail.com)
Date: Sun Jul 02 2006 - 16:34:41 PDT

FYI- Tripped over this writing on another topic.
Title Socioeconomic status modifies heritability of IQ in young children
  Author *Turkheimer*,
*Haley*, Andreana<http://www-md1.csa.com/ids70/p_search_form.php?field=au&query=haley+andreana&log=literal&resolve_au&SID=rd39sf0mjvbaama1q15caosn12>;
Waldron, Mary<http://www-md1.csa.com/ids70/p_search_form.php?field=au&query=waldron+mary&log=literal&resolve_au&SID=rd39sf0mjvbaama1q15caosn12>;
D'Onofrio, Brian<http://www-md1.csa.com/ids70/p_search_form.php?field=au&query=d+onofrio+brian&log=literal&resolve_au&SID=rd39sf0mjvbaama1q15caosn12>;
Gottesman, Irving
  Affiliation U Virginia, Charlottesville, VA, US [Turkheimer, Haley,
Waldron, D'Onofrio, Gottesman]
  Source Psychological Science. Vol 14(6), Nov 2003, pp. 623-628
  ISSN 0956-7976
  Electronic ISSN 1467-9280

Descriptors *Intelligence *Intelligence Quotient *Socioeconomic
Status *Twins
 *Behavioral Genetics Disadvantaged Heritability Nature Nurture Poverty
  *New Search Using Marked Terms:* Use *AND* to narrow Use *OR* to
  Abstract Scores on the Wechsler Intelligence Scale for Children were
analyzed in a sample of 7-year-old twins from the National Collaborative
Perinatal Project. A substantial proportion of the twins were raised in
families living near or below the poverty level. Biometric analyses were
conducted using models allowing for components attributable to the additive
effects of genotype, shared environment, and nonshared environment to
interact with socioeconomic status (SES) measured as a continuous variable.
Results demonstrate that the proportions of IQ variance attributable to
genes and environment vary nonlinearly with SES. The models suggest that in
impoverished families, 60% of the variance in IQ is accounted for by the
shared environment, and the contribution of genes is close to zero; in
affluent families, the result is almost exactly the reverse. (PsycINFO
Database Record (c) 2005 APA, all rights reserved) (journal abstract)
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