Intelligence is the highest attribute of human beings. Different psychologists have defined intelligence differently.
Lewis Terman explains intelligence as, “an ability to think on an abstract level.” David Wechsler defines intelligence as, “the aggregate or global capacity of an individual to act purposefully, to think rationally and to deal effectively with his environment.” Raymond Cattell with his student John Horn proposed a theory of intelligence explaining two types of intelligence viz.
1. Fluid intelligence is dependent on neurological development and it is relatively free from the influences of learning and experiences.
2. Crystallized intelligence is not dependent on one’s neurological development and it is a function of one’s educational attainment, acquired experiences and stock of knowledge.
