The impact of general control processing and working memory capacity on a measure of abstract intelligence was examined with 577 military recruits. A new multicomponent latent trait model for covert response was applied to item response data for matrix problems. General control processing has a stronger impact. (SLD)

Tested 8 individuals with mental retardation or autism and 16 individuals without either condition for their ability to detect a form in a random-dot kinematogram. The presence and generalization of training effects in those who initially did not meet criterion performance suggests that initial failures may be due in part to postperceptual…

Based on stimulating findings suggesting that prenatal levels of steroids may influence cognitive functions, a study with N=40 healthy volunteers of both sexes was conducted. Prenatal levels of testosterone (T) were estimated by use of the second-to-fourth digit ratio (2D:4D) which is supposed to be controlled by the same genes involved in…

Raven's matrices and inspection time (IT) were recorded from 56 subjects under five arousal levels. Raven's and IT correlated strongly (r = -0.7) as predicted by processing-speed theories of "g." In line with Eysenck's [Eysenck, H. J. (1967). "The biological basis of personality". Springfield, IL: Thomas] arousal theory of extraversion, there was…

The predictability of individual differences in the ability to reason about dynamic displays from tests using static displays was studied in 170 adults given paper-and-pencil and computer controlled tests. Several multivariate analyses indicated that the ability to reason about dynamic motion was distinct from the ability to reason about static…

The centrality of intellectual abilities is discussed in terms of two evaluative criteria, given the combined acronym GENECES: (1) the "generality" of the ability in performances on tasks requiring adaptation to, selection of, and shaping of real-world environments; and (2) the "necessity" of these abilities in performing tasks. (Author/LMO)

The results of studies regarding intelligence in infancy are reviewed, and are compatible with Sternberg's findings on intelligence in adulthood. It is suggested that a major aspect of intelligence--attitude toward and performance with novel kinds of concepts--is continuous in nature throughout the life span, but requires different measurement…

Dewey's notion of "reflective thinking" is discussed. A model of phases of reflective thinking is described: problem recognition, enumeration of possibilities, reasoning, revision, and evaluation. Each phase has at least one parameter governing its operation and one rule for setting the optimum parameter value. Sources of individual…

The ability to generalize is probably the primary aspect of intelligence. The computer's inability to generalize is the major stumbling block associated with machine intelligence. (Author/CP)

The relationship between psychometric intelligence and 2 selective reaction time (RT) tasks was determined for 81 university students (27 males and 54 females). Results generally support the paradigm of W. E. Hick (1952). Some surprising findings are discussed with respect to the specific demands of selective RT tasks. (SLD)

A correlation between intelligence level (IQ) and nerve conduction velocity (NCV) was demonstrated for 147 undergraduate students in the eastern San Francisco (California) Bay area. Recent studies of retarded subjects support the findings, explainable by positive correlations among NCV, speed of information processing, and IQ. (Author/SLD)

Event-related potentials (ERPs) and reaction time (RT) were recorded concurrently during performance of 6 simple cognitive tasks by 30 right-handed women who varied in mental ability. Results suggest that ERPs and RT may assess stimulus evaluation time and the response-production time components of cognitive information processing. (Author/SLD)

Results from a study in which 25 deaf children and 25 hearing children completed a vocabulary test and a compound stimulus visual information task support the hypothesis that performance on cognitive tasks is dependent on compatibility of task demands with a coding orientation. (SLD)

Presents two experiments involving 16 and 14 college students that were designed to enhance the sensitivity of reaction time as an information-processing correlate of general ability. Data from both are interpreted in terms of mental efficiency theories of intelligence. (SLD)

Examined the effects of practice, response strategies, and attentiveness on inspection time (IT) and its relation to IQ in 3 experiments involving 102 college students, testing the hypothesis that mental speed is the basis for the observed IT-IQ relation. Discusses the mixed results and evidence that the correlation is malleable. (SLD)