Letter | Published:

Correlation Coefficients and the Theory of Mental Abilities

Abstract

SINCE the discovery by Spearman of hierarchical order in correlations between mental tests, the theory of mental ability has been actively explored. Mathematical methods have been made possible by regarding mental abilities as variables composed of certain constituent factors which are distributed unequally among individuals. The extent to which such factors of mental ability may be called into activity will presumably depend on their use in any given situation.

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