A History of Mental Ability Tests and Theories
The concepts of measurement and theory have always been central to psychological science. This chapter reviews the history of applied mental tests and the ideas behind them, with a specific emphasis on individually administered intellectual measures in the era of scientific psychology (i.e., after Wundt). The chapter discusses theoretical underpinnings associated with mental tests and test/theory falsifications. Beginning with the contributions of Francis Galton and J. McKeen Cattell and continuing through the present, the topics discussed include anthropometric testing, Charles Spearman’s two-factor theory and general intelligence factor, Alfred Binet and David Wechsler’s pragmatic approaches, Raymond B. Cattell and John L. Horn’s fluid and crystallized intelligence, John B. Carroll’s three-stratum model of cognitive abilities, and Alexander R. Luria’s conceptualization of brain-based, cognitive processing. The chapter closes with a discussion about theory-building and falsification in mental testing and the importance of reconciling theory with clinical practice in psychological assessment.