Which variable is more difficult to isolate in a family study compared to an adoption study

Question

Quizplus · Accepted Answer

In a family study, it is difficult to isolate the effects of the shared environment, as family members share both genes and environmental factors. In contrast, in an adoption study, genetic relatedness is not present, so environmental factors can be more easily separated from genetic ones. Socioeconomic status and sex differences can be controlled for in both types of studies. Genetic predisposition may be more difficult to isolate in an adoption study, but the question specifically compares family and adoption studies.

Which Variable Is More Difficult to Isolate in a Family