As Reported in the Textbook, Research Demonstrating a Genetic Influence

Multiple Choice

As reported in the textbook, research demonstrating a genetic influence on a person's level of extraversion- introversion comes primarily from research

A) using the twin-study method.
B) comparing adopted children and biological children to their parents.
C) comparing strength of relationship with similarity of personality scores.
D) comparing adopted children's personalities with the personalities of their biological parents.