Which of the following is the research method most commonly used to explore the role of genetic and environmental factors in human intelligence?
A) research using nonhuman animals as subjects
B) studies of twins and other genetically related individuals
C) computer models and simulations
D) a systematic comparison of individuals' scores on the Raven's Progressive Matrices test with their scores on the WAIS and WISC

Question

Quizplus · Accepted Answer

Studies of twins and other genetically related individuals are commonly used to explore the role of genetic and environmental factors in human intelligence. This method involves comparing the IQ scores of identical twins (who share 100% of their genes) to those of fraternal twins (who share approximately 50% of their genes) or other siblings. By studying the differences between these groups, researchers can determine the relative contributions of genetics and environment to IQ.

Which of the Following Is the Research Method Most Commonly