Theories of Intelligence and Intellectual Variation (6B)
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QUESTION
Identify the meaning of a heritability estimate of
0.60
0.60
0.60
for IQ in a population.
QUESTION
What is the best interpretation if adopted siblings show near-zero IQ correlation in adulthood?
QUESTION
Identify the correlation pattern that supports a genetic influence: MZ twins
r
=
0.80
r=0.80
r
=
0.80
, DZ twins
r
=
0.40
r=0.40
r
=
0.40
.
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ANSWER
MZ correlation greater than DZ correlation supports genetic influence. MZ twins share twice the genetic similarity of DZ twins.
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