The quantitative approach to intelligence is better reflected in psychometric theories of which Charles Spearman's is an early example.
Most neuropsychological tests in current use are based on traditional psychometric theory.
As a scientific and scholarly field, personnel selection owes much to psychometric theory and the art of integrating selection systems falls to human resource professionals.
He taught courses in introductory statistics, psychometric theory, factor analysis, multivariate statistics, structural equation modelling, personality theory, and introduction to psychology during his career.
More recently, psychometric theory has been applied in the measurement of personality, attitudes, and beliefs, and academic achievement.
Mathematical psychology is closely related to psychometric theory.
Characterizing the accuracy of test scores is perhaps the central issue in psychometric theory and is a chief difference between IRT and CTT.
Classical test theory is a body of related psychometric theory that predicts outcomes of psychological testing such as the difficulty of items or the ability of test-takers.
In terms of modern psychometric theory, Thurstone's approach, called the law of comparative judgment, is more aptly regarded as a measurement model.
Revelle studies the biological basis of personality and motivation, psychometric theory, the structure of daily mood, and models of attention and memory.