What behavioral genetic research finding seems to support the conclusion that the effect of growing up in the same home environment is rather minimal?
A) The personality traits of monozygotic (MZ) twins are correlated at .50 on average.
B) The personality traits of dizygotic (DZ) twins are correlated at .30 on average.
C) The personality traits of adoptive siblings raised in the same family are correlated around .05.
D) The personality traits of adoptive siblings raised in the same family are correlated above .25.

Question

Quizplus · Accepted Answer

The correlation of personality traits between adoptive siblings raised in the same family being only around .05 suggests that growing up in the same home environment has a minimal effect on personality. If the effect was significant, the correlation between adoptive siblings would be higher, closer to the correlation found in MZ twins who share both genes and environment.

What Behavioral Genetic Research Finding Seems to Support the Conclusion