RE: [xmca] Class matters

From: Peg Griffin (
Date: Mon Jul 03 2006 - 14:49:17 PDT

Berliner's piece from the TC Record online makes good use of this sort of
evidence about poverty inhibiting the expression of genetic variation.

Berliner, David C. "Our Impoverished View of Educational Reform"
Teachers College Record, August 02, 2005
Retrieved from:

LCHC and UCSD Communication
(858) 822-4314
-----Original Message-----
From: [] On
Behalf Of Mike Cole
Sent: Sunday, July 02, 2006 7:35 PM
To: eXtended Mind, Culture, Activity
Cc: Charles Lave
Subject: [xmca] Class matters

FYI- Tripped over this writing on another topic.
Title Socioeconomic status modifies heritability of IQ in young children
  Author *Turkheimer*,
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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