A researcher wants to know if intelligence is based more prominently on factors of family environment or on heredity. Her research focuses on identical twins who are raised together in the same home and those who were separated at birth and raised in different homes by different parents. According to the textbook, this researcher is conducting a(n) ____ study.
a. sibling
b. adoption
c. twin
d. family
Question 2
Dr. Tarantino wants to know the degree to which heredity and environment affect differences among individuals. Which research approach would he be least likely to consider?
a. gender study
b. adoption study
c. family study
d. twin study