Description
This article summarizes the results of a study which looked at the factor analysis of cognitive abilities. The study found that there are three strata of cognitive ability, with the highest stratum representing the most intelligent people. The study also found that different cognitive abilities are correlated with each other. Finally, the study found that different cognitive abilities are also correlated with different aspects of intelligence.
This long awaited work surveys and summarizes the results of more than seventy years of investigation, by factor analysis, of a variety of cognitive abilities, with particular attention to language, thinking, memory, visual and auditory perception, creativity and the production of ideas, and the speed and accuracy of mental processing. The author describes his detailed findings resulting from reanalysis of more than 460 data sets from the factor-analytic literature, followed by a presentation of a hierarchical, three-stratum theory of cognitive ability and its implications for further research. A set of three computer disks (IBM 3-1/2" 1.4 megabytes, ASCII format) containing the numerical data sets and Dr. Carroll's statistical results is also available. Representing over 4 megabytes of data or roughly 2000 printed pages the disks are major resources for the interested researcher.
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