= John L. Horn
{wiki=John_L._Horn}
John L. Horn was an American psychologist best known for his work in the field of intelligence and psychometrics. He is particularly noted for his contributions to theories of intelligence, including the Cattell-Horn-Carroll (CHC) theory of intelligence, which synthesizes various models of cognitive abilities. Horn's research distinguished between fluid intelligence (Gf) and crystallized intelligence (Gc), emphasizing how these two types of intelligence develop and the ways they interact.
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