Critics have pointed to several weaknesses in the research used to make a case for the role of genetics on personality development. Their criticisms include each of the following points except one. Which one?
A) Dizygotic twins may share an environment more alike than the environment shared by monozygotic twins.
B) Families who adopt children are different from those who do not adopt.
C) Parents may treat adopted children differently than they treat biological children.
D) Parents of dizygotic twins may look for and emphasize the differences between the twins more than parents of monozygotic twins.

Question

Quizplus · Accepted Answer

A) is incorrect because it contradicts the common assumption in twin studies that dizygotic (fraternal) twins and monozygotic (identical) twins share their environments to a similar degree. The criticisms usually focus on the genetic interpretations of similarities between twins, not on the environmental similarities being greater for dizygotic twins.

Critics Have Pointed to Several Weaknesses in the Research Used