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Unformatted text preview: ehavioral geneticists believe that most
traits of interest are multifactorial. -they are affected by many envtl factors as well as many genes 1. Behavior Genetics Research Designs
The family study is the mainstay of modern behaviorgenetics research.
Measure trait of interest among people who vary in
Correlations between the measure of the trait in
individuals with different
examined to see if they
are higher for individuals
who: -are genetically more similar
-share the same envt Types of Family Studies
Correlations for pairs of
monozygotic twins and
dizygotic twins. Adoption Studies:
are more like their biological or their adopted relatives 9 5/22/13 Identical Twins Reared Apart
Studied twin siblings who have not
met since they were infants
The team of investigators were struck by
the similarities they found in traits like IQ,
reaction to stress, and traditionalism. -these similarities may be inﬂuenced by sel...
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- Fall '13