L. L. Thurstone's seven clusters, Robert Sternberg's triarchic theory, and Charles Spearman's general g-factor are all theories of this phenomenon.
Raymond Cattell theorized this concept's crystallized and fluid forms. L. L. Thurstone's seven clusters, Robert Sternberg's triarchic theory, and Charles Spearman's general g-factor are all theories of this phenomenon. Howard Gardner proposed eight (*) "multiple" forms of this ability which included naturalist, bodily-kinesthetic, and spatial. The Stanford-Binet test measures this ability, while another measure of it compares two types of ages and is averaged at 100. Savants may have an exceptionally high number for, for 10 points, a namesake quotient measuring what concept of how smart someone is?
Raymond Cattell theorized this concept's crystallized and fluid forms.
 Psycho