9Urie BronfenbrennerAlthough Jensen's (I969a, I969b) argument claiming genetically‐
based race differences in intelligence has been repeatedly and
forcefully attacked (e.g., Scarr-Salapatek, I97Ia), his thesis that
80 percent of the variation in intelligence is determined by heredity has been generally accepted (e.g., Scarr-Salapatek, I97Ib).
Since Jensen takes this thesis as the foundation both for his argument for innate differences in ability between the races, and for
his contention that intervention programs with disadvantaged
groups have little hope of success, it becomes important, both
from the point of view of science and of social policy, to examine
the evidence and line of reasoning that underlie his initial thesis.
Jensen's argument rests on inferences drawn primarily from three
sets of data:
NATURE WITH NURTURE:
A REINTERPRETATION OF
|i. ||Studies of resemblance between identical twins reared apart.|
|2. ||Studies of resemblance between identical vs. fraternal twins
reared in the same home.|
Questia, a part of Gale, Cengage Learning. www.questia.com
Book title: Race and IQ.
Contributors: Ashley Montagu - Editor.
Publisher: Oxford University Press.
Place of publication: New York.
Publication year: 1999.
Page number: Not available.
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