Studies involving groups administered the Wechsler Adult Intelligence Scale (WAIS) and the WAIS-Revised were examined to determine the validity of J. R. Flynn's (1987) findings of massive intelligence quotient gains in a single generation in many nations. Results for sampled adults support Flynn for the average intelligence range only. (TJH)

Letter series and number series tests of items based on identical rules were administered to 160 male and 160 female undergraduates to determine comparability by testing equality of means, variances, and validity coefficients. Results indicate that letter and number series tests are not equivalent. Number series tests are easier, probably because…

The validity of the fourth edition of the Stanford-Binet (S-B IV) test was studied with 30 linguistically precocious children at ages 20, 24, and 30 months. Validity at 24 months was questionable. Problems in using the test with very young children are discussed. (SLD)

While the constructs of aptitude and achievement, which are defined as genotypic and environmental constructs, are potentially useful in psychological theory and in the development of predictors, the use of these terms for psychological tests is highly misleading. Implications of this position for group differences in aptitude and construct…

Various testing-the-limits procedures were employed in administering the Raven Coloured Progressive Matrices Test to second- and fourth-grade children. Tests of impulsivity, neuroticism, extroversion, intelligence, and achievement were given. Procedures which involved verbalization and feedback were efficacious in maximizing performance on the…

[Gottfredson, L. S. (2003). Dissecting practical intelligence theory: Its claims and evidence. Intelligence, 31, 343-397.] provided a detailed critique of Sternberg's [Sternberg, R. J., Fotsythe, G. B., Hedlund, J., Horvath, J. A., Wagner, R. K., Williams, W. M., Snook, S. A., Grigorenko, E. L. (2000). Practical intelligence in everyday life. New…

Several measures of the speed of information processing were related to ability factors derived from the Cattell-Horn theory of fluid and crystallized intelligence. Correlations among the ability measures, among the information processing measures, and between the two domains were analyzed using confirmatory factor analysis. (Author/PN)