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G factor (psychometrics)
Psychometric factor also known as "general intelligence"
G factor (psychometrics)
The g factor is a construct developed in psychometric investigations of cognitive abilities and human intelligence that summarizes positive correlations among different 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. The terms IQ, general intelligence, general cognitive ability, general mental ability, and simply intelligence are often used interchangeably to refer to this common core shared by cognitive tests. However, the g factor itself is a statistical construct driven by the level of observed correlation between cognitive tasks. The measured value of this construct depends on the cognitive tasks that are used, and little is known about the underlying causes of the observed correlations. The existence of the g factor was originally proposed by the English...
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