Suppose identical twins raised apart have a correlation of .40 on a measure of some aspect of personality, and identical twins raised together have a correlation of .60 on this same measure. From these data, what can we logically conclude about this trait?
a. Nonshared environment has an impact because, even raised together, the identical twins do not show a perfect 1.00 correlation.
b. Nonshared environment has no impact because the identical twins raised apart have a lower correlation than the identical twins raised together.
c. Shared environment has no impact because identical twins raised apart have a correlation lower than 1.00.
d. Shared environment has an impact because identical twins raised apart have a correlation of .40.
Question 2
Experiences unique to an individual and not experienced by other family members are referred to as
a. shared environmental experience.
b. genetic effect.
c. nonshared environmental experience.
d. crossing over effect.
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