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What are the influences of environment and heredity on measured intelligence? HEREDITY Psychologists are greatly divided over whether heredity or environment has a more dominant influence on individual intelligence. Although some animal studies appear to suggest h ....

Middle of Essay
.... the similarities in their IQ can be seen to decrease, however not by much. As the similarities are still impressive one may be lead to believe that heredity plays a major role in intelligence, but one must not overlook the fact that almost all separated twins are placed in homes socially and educationally similar to those of their biological parents. This tends to falsely increase the apparent effect of genes on intelligence, by making the separated twins IQ more alike. Psychologists who place emphasis on environmental influence in regards to intelligence point out that in the cases where separated twins were placed in homes with significant educ ....