Although psychologists have been discussing this concept since the 1870’s, there is no general agreement on what intelligence is. Most psychologists would probably agree that HEREDITY sets the limits of a person’s intelligence and most would agree that the ability to learn in one form or another (handling abstract ideas, adapting to new situations, perceiving complex relationships) is a sign of high intelligence which doesn’t get us very far but has never prevented psychologists from designing new INTELLIGENCE TESTS. Intelligence is a good example of a PHENOTYPE.
