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Intelligence: a definition

Explaining the definitions of intelligence

So what is intelligence?

After so many years of research and studies on intelligence, is there a good and precise definition of intelligence that scientists agree upon?

Well, yes and no. Two leading scientists in the field of intelligence have defined it in two very different manners, illustrating how challenging it is to define intelligence. This video will further unpack the complexity in defining intelligence.


  • Boring, E. G. (1923). Intelligence as the test measures it. The New Republic, 35, 35–37.
  • Gottfredson, L. S. (1997). Mainstream science on intelligence. Intelligence, 24(1), 13-23.
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