G factor (psychometrics)
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The g factor (also known as general intelligence, general mental ability or general intelligence factor) is a construct developed in psychometric investigations of cognitive abilities and human intelligence. It is a variable that summarizes positive correlations among different cognitive tasks, reflecting the fact that an individual's performance on one type of cognitive task tends to be comparable to that person's performance on other kinds of cognitive tasks. The g factor typically accounts for 40 to 50 percent of the between-individual performance differences on a given cognitive test, and composite scores ("IQ scores") based on many tests are frequently regarded as estimates of individuals' standing on the g factor.
See also
- Charles Spearman
- Factor analysis in psychometrics
- Fluid and crystallized intelligence
- Flynn effect
- Intelligence
- Intelligence quotient
- Malleability of intelligence
- Spearman's hypothesis
- Eugenics
