To investigate the role of genetic factors in personality, researchers administered the MMPI to pairs of identical twins who had been reared apart and pairs of nonidentical twins who had been reared together.Imagine that these researchers found that the nonidentical twins reared together were more similar on a given trait than the identical twins reared apart.This would be evidence that:

Question

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If the nonidentical twins reared together are more similar on a given trait than the identical twins reared apart, it suggests that the environmental factors, such as shared family experiences and upbringing, have a larger influence on the expression of that trait than genetics. This is because the nonidentical twins share only half of their genes, whereas the identical twins share all of their genes. Therefore, if the nonidentical twins are more similar, it suggests that their shared environment has played a larger role in shaping their personality.

To Investigate the Role of Genetic Factors in Personality, Researchers