An assumption of twin studies is that
A) twins are more intelligent than singletons.
B) both twins of a pair have had similar experiences.
C) the twins are monozygotic.
D) the twins are dizygotic.
E) the twins are the same age.

Question

Quizplus · Accepted Answer

Twin studies rely on the assumption that both twins of a pair have had similar experiences, which allows for the exploration of genetic influences on behavior and traits. This assumption is necessary for the validity and reliability of twin studies to measure the heritability of traits or behaviors. The other answer choices are either incorrect or irrelevant to the assumption of twin studies.

An Assumption of Twin Studies Is That