The failure to correctly report two targets ("T[subscript 1]", "T[subscript 2]") that follow each other in close temporal proximity has been called the "attentional blink" (AB). The AB has, so far, mainly been studied using experimental approaches. The present studies investigated individual differences in AB performance, revealing (among further…

According to the temporal resolution power (TRP) hypothesis, higher TRP as reflected by better performance on psychophysical timing tasks accounts for faster speed of information processing and increased efficiency of information processing leading to better performance on tests of psychometric intelligence. An alternative explanation of…

There is increasing evidence relating psychometric measures of general intelligence and reasoning to regional brain structure and function assessed with a variety of neuroimaging techniques. Cognitive dimensions independent of general intelligence can also be identified psychometrically and studied for any neuroanatomical correlates. Here we…

The Zahlen-Verbindungs-Test (ZVT) represents a highly feasible measure of information-processing speed that correlates quite highly with standard psychometric tests of intelligence. The present study was designed to identify specific stages of the sensorimotor processing system that may account for individual differences in overall variability of…

Vertex event-related potentials (ERPs) were obtained from undergraduates performing an inspection time task together with measures of inspection time (n=35) and mental ability (n=28). Techniques that reveal changes over time in the relationship between ERP measures and psychometric indices were presented. (SLD)

The relationship between general intelligence and the ability to ignore irrelevant stimuli appearing in the same visual field as an attended target was studied for 167 college students. Results indicate that psychometric intelligence does not tap visual focused attention. (SLD)

This study investigated whether a unitary elemental process or several independent processes underlie psychometric "g" (factor of general intelligence). Results with 101 college students administered 2 intelligence tests and a large battery of elementary cognitive tasks suggest that as many as 4 independent components make up…

Administered a battery of psychometric ability tests to 211 undergraduates and 622 other adults ranging in age from 43 to 78. Findings were consistent with the view that speed of information processing can be an important correlate of individual differences in rates of intellectual aging and a performance-specific confound that distorts estimates…

In experimental time estimation research, it has consistently been found that the more a person is engaged in some kind of demanding cognitive activity within a given period of time, the more experienced duration of this time interval decreases. However, the role of individual differences has been largely ignored in this field of research. In a…

This article analyzes if working memory (WM) is especially important to understand "g." WM comprises the functions of focusing attention, conscious rehearsal, and transformation and mental manipulation of information, while "g" reflects the component variance that is common to all tests of ability. The centrality of WM in individual differences in…

A commentary is made on each of five symposium papers on the unification of cognitive process theory and differential psychology. Future research directions are reviewed within a new theoretical framework as to the process nature of aptitudes and general intelligence. Future psychometric directions and educational implications are discussed. (RD)

The relationship between psychometric intelligence and reaction times (RT) was studied in 60 undergraduates using an elementary cognitive task, the Sentence-Picture Verification Test. Results, which show that psychometric intelligence is substantially correlated with RTs even after practice, support the mental speed hypothesis of general…

The relationship between elementary operations underlying processing of numerical information and performance on psychometrically derived ability measures requiring processing of numbers but defining separate ability factors was studied for 102 Air Force recruits (54 males and 48 females). Patterns of convergent and discriminate relationships for…

Because they used an inappropriate statistical procedure, J. H. Kranzler and A. R. Jensen (1991) have not demonstrated that a factor of general intelligence ("g") depends on several independent factors. A factorial reanalysis of their data suggests that speed and efficiency of information processing are important in "g." (SLD)

The hypothetical idea of a perfectly pure psychometric "g" is empirically unattainable. Because the unity of "g" cannot be proved or disproved by factor analysis, the unitary "g" hypothesis represents a parsimonious assumption. J. B. Carroll's (1991) analysis demonstrates the relationship between psychometric and…