IQ test results (or SAT scores) of close relatives. IQ tests are an imperfect measure of general intelligence. Given the large genetic component to general intelligence, knowing how someone’s sibling did on an IQ test gives you additional useful information about a person’s general intelligence, even if you know that person’s IQ test score.
IQ test results (or SAT scores) of close relatives. IQ tests are an imperfect measure of general intelligence. Given the large genetic component to general intelligence, knowing how someone’s sibling did on an IQ test gives you additional useful information about a person’s general intelligence, even if you know that person’s IQ test score.