(John Carroll; 1990s): a mash-up of g Factor and Generalized Intelligence (see above), in which intelligence is described as a three-layer hierarchy. Stratum III is the g Factor, which is seen to emerge from the eight broad abilities of Stratum II (fluid intelligence, crystallized intelligence, general memory and learning, broad visual perception, broad auditory perception, broad retrieval ability, broad cognitive speediness, processing speed), which in turn emerge from many and diverse specific factors that constitute Stratum I.
Please cite this article as:
Davis, B., & Francis, K. (2020). “Three-Stratum Theory” in Discourses on Learning in Education. https://learningdiscourses.com.
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