True or False: Twins have a very high correlation in IQ scores.

The statement is true because research has consistently shown that twins, especially identical twins, tend to have very high correlations in IQ scores. This high correlation is attributed to the shared genetic factors that both types of twins possess. In identical twins, who share 100% of their genes, the similarity in intelligence is particularly pronounced. Even among fraternal twins, who share about 50% of their genetic makeup, there is still a notable correlation in IQ scores—though it is typically lower than that found in identical twins.

The strong correlation in intelligence between twins highlights the significant role that genetics plays in determining cognitive abilities. This does not discount the influence of environmental factors, which also contribute to intelligence, but the genetic aspect is particularly strong in twin studies. Thus, the answer is correct as it reflects the well-documented findings in psychology regarding the relationship between genetics and intelligence.