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The g factor [a] 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 assertion 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.
Most measures of g in humans, including most IQ tests, rely heavily on language and verbal ability, and so they cannot be directly applied to non-human animals. Several alternative measures have been developed to study intelligence in animals, relying on the observation of animals in natural situations or on behavioral tasks in experimental settings.
The small ovals represent tests of cognitive ability, while the red circle represents psychometric g. The blue portions of each test show the amount of test variance attributed to s , or the specific test factor, by Charles Spearman in his two-factor theory of cognitive abilities.
The Woodcock–Johnson Tests of Cognitive Abilities is a set of intelligence tests first developed in 1977 by Richard Woodcock and Mary E. Bonner Johnson (although Johnson's contribution is disputed). [1] It was revised in 1989, again in 2001, and most recently in 2014; this last version is commonly referred to as the WJ IV. [2]
Gc tasks include problem solving with familiar materials and culture-fair tests of general knowledge and vocabulary. [citation needed] Gf and Gc are both factors of g (general intelligence). Though distinct, there is interaction, as fluid intelligence is a determining factor in the speed with which crystallised knowledge is accumulated (Cattell ...
[1] [2] [3] According to Cattell's psychometrically-based theory, general intelligence (g) is subdivided into g f and g c. Fluid intelligence is the ability to solve novel reasoning problems and is correlated with a number of important skills such as comprehension, problem-solving, and learning. [ 4 ]
g factor may refer to: g factor (psychometrics), a model used to describe the commonality between cognitive ability test results; g-factor (physics), a quantity related to the magnetic moment of an electron, nucleus, or other particle; The g Factor: The Science of Mental Ability, a book by Arthur R. Jensen about the psychometric concept
Vernon puts emphasis on the g factor in all the mental abilities. He extracted the g factor from an ability test, then found that those remaining content [clarification needed] could be divided into two separate parts. He named those two orthogonal group factors as verbal-educational factor (v:ed) and perceptual-mechanical skill factor (k:m).