In adoption studies
A) the results may be biased because biological and adoptive parents may be similar.
B) adoptive parents are assumed to provide genetic influence.
C) biological parents are assumed to provide environmental influence.
D) the greater similarity of adoptees to biological than to adoptive parents on a trait would indicate that the trait is influenced by the environment.

Question

Quizplus · Accepted Answer

Adoption studies may suffer from bias because biological and adoptive parents may share similar traits, such as socioeconomic status, that can affect the outcome being studied.

In Adoption Studies