Facts about G Factors

1. 05

   Extracted via factor analysis, g accounts for a large proportion of the common variance shared among diverse cognitive tests in a battery.

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2. 04

   Fluid intelligence and crystallized intelligence, identified by Raymond Cattell, represent a refinement of g factor theory into two distinct broad cognitive abilities.

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3. 03

   In psychometrics, g factor correlates positively with a wide range of real-world outcomes, including academic achievement, job performance, and health outcomes.

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4. 02

   Scores on g factor are highly heritable, with twin studies showing genetic factors accounting for a substantial portion of variance in general intelligence.

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5. 01

   The g factor, proposed by Charles Spearman in 1904, represents a general cognitive ability thought to underlie performance across diverse mental tasks.

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