The textbook's example study of extraversion in identical and fraternal twins demonstrated that
A)identical twins were more extraverted than fraternal twins.
B)fraternal twins were more extraverted than identical twins.
C)identical twin pairs were more similar than fraternal twin pairs.
D)there was no differences between identical and fraternal twin pairs.

Question

Quizplus · Accepted Answer

The study found that identical twin pairs were more similar in extraversion than fraternal twin pairs, suggesting that there is a genetic influence on this personality trait. This supports the idea that extraversion is at least partially heritable.

The Textbook's Example Study of Extraversion in Identical and Fraternal