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.
A g-factor (also called g value or dimensionless magnetic moment) is a dimensionless quantity that characterizes the magnetic moment and gyromagnetic ratio of an atom, a particle or nucleus.
The gravitational force, or more commonly, g-force, is a measurement of the type of acceleration that causes a perception of weight.
The g Factor: General Intelligence and Its Implications is a book by Christopher Brand, a psychologist and lecturer at the University of Edinburgh.
The g Factor: The Science of Mental Ability is a 1998 book by psychologist Arthur Jensen.