According to Alfred Binet, "Intelligence is the ability for judgement or common sense. Thorndike defines, "Intelligence as one's capacity to deal effectively with situations." For Jean Piaget, "Intelligence is the ability to adapt to one's surroundings" In the words of Cyril Burt, "Intelligence is the capacity of flexible adjustment." According to David Wechsler (1977) : The global capacity to think rationally, act purposefully, and deal effectively with the environment.
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