a psychometric design of intelligence based upon a factorial reanalysis of many information sets available within the literature. It is thought by some researchers to be the most widely supported of the many different psychometric theories of intelligence. The three strata correlate to (i) minor group aspects at the first degree, (ii) significant group aspects at the second degree, and (iii) the general aspect at the third (iv) degree.
THREE-STRATUM MODEL OF INTELLIGENCE: "The three-stratum model of intelligence was postulated by John B. Carroll, a psychologist, in the 1990's."
