Research involving family and adoption studies have demonstrated that
A)the higher the percentage of shared genes between people,the higher their IQ correlations will be.
B)siblings reared together and cousins reared together have similar IQ correlations.
C)the correlations between the IQ scores of cousins reared together are very strong.
D)the correlations between the IQ scores of cousins reared together are negative.

Question

Quizplus · Accepted Answer

Research involving family and adoption studies have consistently shown that genetic factors play a significant role in determining intelligence. The higher the percentage of shared genes between people, the higher their IQ correlations will be. This is supported by studies comparing the IQs of siblings reared together and cousins reared together, which have shown that siblings have a higher IQ correlation due to their increased genetic similarity.

Research Involving Family and Adoption Studies Have Demonstrated That