Effects of cognitive training on primary mental ability structure

We report results of the first empirical test, as far as we know, of the assumption of structural invariance of latent constructs from pretest to posttest in cognitive training research on the elderly. In all, 401 participants in the Seattle Longitudinal Study, over 62 years old, received a 5-hr test battery at pre- and posttest that included 16 ability tests, marking the five primary abilities of Spatial Orientation, Inductive Reasoning, Numerical Ability, Verbal Ability, and Perceptual Speed. A total of 229 of our subjects received 5 hr of individual training on either Spatial Orientation or Inductive Reasoning. Restricted factor analysis with the LISREL algorithm tested the hypothesis of measurement equivalence across test occasions, separately for the control subjects and for each of the training groups. When ability-specific cognitive training intervenes, no structural change is observed for abilities not subject to intervention. However, slight shifts occurred in the optimal regression weights for the different markers for the training target abilities.     

Effects of Abacus training on the intelligence of Sudanese children

The effects of Abacus training in mental computation on intelligence assessed with the standard progressive matrices (SPM) was investigated in a sample of 3185 children aged between 7 and 11 years in Sudan. The sample was divided into two groups matched for scores on the SPM, sex, age and urbanization. The experimental group was given an intensive Abacus program training for two hours per week for 34 weeks. The control group did not receive any training. Following the end of the training the control and the experimental groups were retested with the SPM. Controlling for practice effects, the experimental group gained a statistically significant 7.11 IQ points attributable to the training. The experimental group also performed significantly faster following training. The results suggest that the introduction of a greater emphasis on problem solving skills in Sudanese schools may be expected to increase general intelligence.     

Effects of cognitive training on academic and on-task behavior of hyperactive children

A cognitive training program that taught both self-instructional and self-management skills was used with three 7-to 8-year-old hyperactive children. A multiple baseline across individuals design was used to evaluate the effects of training on on- task behavior and math accuracy. There were significant changes in math accuracy for all subjects, and two subjects showed significant improvements in on- task behavior. Evidence suggesting generalization to untrained behaviors was shown by an increase in self-correction of oral reading for all subjects. The results suggest that cognitive training specifically designed to promote generalization to classroom tasks can improve the classroom behavior and academic achievement of hyperactive children.The study was supported by a scholarship to the first author from the Specific Learning Difficulties Association (SPELD, Auckland). The authors would like to thank Mr. T. F. Walbran, deputy district senior inspector of primary schools, and Mrs. S. Gribben and the staff of Dominion Road Primary School; Mrs. F. Donovan helped with the collection of reading data and Dr. G. Arvidson gave assistance with data analysis. Special thanks also go to the graduate students who served as trainers or observers.     

The three-stratum theory of cognitive abilities: Test of the structure of intelligence across the life span

Recently a three-stratum theory of intelligence that combines the major aspects of Spearman's (1927) theory of general intelligence (g) and Horn and Cattell's (1966) theory of crystallized and fluid intelligence (G_f-G_c) has been proposed (Carroll, 1993a). The purpose of this study was to test the three-stratum theory using hierarchical confirmatory factor analysis with the LISREL computer program. Developmental changes in the structure of intelligence were also investigated. Results provided support for the three-stratum theory and suggested the possibility of intermediate factors between the second and third strata but did not support developmental changes in the organization of cognitive abilities over the life span.     

Differential effects of cognitive inhibition and intelligence on creativity

There are different conceptions about how cognitive inhibition is related to creativity. Creativity has either been associated with effective inhibition, or with disinhibition, or with an adaptive engagement of inhibition. In this study, we examined the relationship of cognitive inhibition, assessed by means of the random motor generation task, with different measures of creativity. We also analyzed whether this relation is mediated by intelligence. We generally found a positive correlation of inhibition and creativity measures. Moreover, latent variable analyses indicate that inhibition may primarily promote the fluency of ideas, whereas intelligence specifically promotes the originality of ideas. These findings support the notion that creative thought involves executive processes and may help to better understand the differential role of inhibition and intelligence in creativity.     

The impact of counsellor training on emotional intelligence

This study evaluated the impact of counsellor training on emotional intelligence (EI) in 45 undergraduates and 58 postgraduates. Significant improvements were recorded by students on completion of both programmes, suggesting that these were attributable to training which enhanced intra- and interpersonal aspects of emotional functioning. As a group, postgraduates were older than undergraduates, and at the outset of the study, EISAQ scores were comparable; however, at follow-up, undergraduates recorded significantly higher EISAQ scores. Students’ EI was not significantly related to their age, and these findings indicate the potential for effective EI-skills training which is unrelated to quantity of life experiences. It is hoped that this study contributes to a growing quantitative evidence base from which the counselling profession can evaluate its training profile.     

Relationship of intelligence with cognitive therapy outcome

Theorists have speculated that intelligence is positively associated with the capacity to benefit from cognitive-behavioral therapies. We evaluated this notion by relating pre-treatment measures of fluid and crystallized intelligence to self-reported symptom reduction in a naturalistic study (n = 106) of cognitive therapy for outpatients with principal diagnoses of major depression, dysthymia, or generalized anxiety disorder. Intelligence measures did not significantly predict outcome, and nonsignificant relationships were in the opposite direction from the theoretical prediction. Discussion centered on possible limitations to the generalizability of these results and on the logical interpretation of prediction studies in psychotherapy research.     

Item learning in cognitive skill training: Effects of item difficulty

Item difficulty effects in skill learning were examined by giving participants extensive training with repeated alphabet arithmetic problems that varied in addend size (e.g., C ? D = ? is easy; C ? J = ? is harder). Recognition memory for the items, as measured by interpolated recognition tests, was acquired early in training and was unaffected by item difficulty. Memory for the solutions to items, as measured by the participants’ strategy reports that they had retrieved, rather than computed, the solution, was acquired later and was affected by item difficulty. Solutions to easier items were learned earlier in training for both young adults (18–24 years) and older adults (60–75 years), superimposed on an overall lower level of solution learning in older participants. The results suggest that the formation of associations between problems and their solutions is effortful and shares limited processing resources with the computational demands of the problem.     

Effects of interactive physical-activity video-game training on physical and cognitive function in older adults

The purpose of the present study was to assess the potential of exergame training based on physically simulated sport play as a mode of physical activity that could have cognitive benefits for older adults. If exergame play has the cognitive benefits of conventional physical activity and also has the intrinsic attractiveness of video games, then it might be a very effective way to induce desirable lifestyle changes in older adults. To examine this issue, the authors developed an active video game training program using a pretest-training-posttest design comparing an experimental group (24 × 1 hr of training) with a control group without treatment. Participants completed a battery of neuropsychological tests, assessing executive control, visuospatial functions, and processing speed, to measure the cognitive impact of the program. They were also given a battery of functional fitness tests to measure the physical impact of the program. The trainees improved significantly in measures of game performance. They also improved significantly more than the control participants in measures of physical function and cognitive measures of executive control and processing speed, but not on visuospatial measures. It was encouraging to observe that, engagement in physically simulated sport games yielded benefits to cognitive and physical skills that are directly involved in functional abilities older adults need in everyday living (e.g., Hultsch, Hertzog, Small, & Dixon, 1999).     

Applying cognitive theory to the testing and teaching of intelligence

This article describes how cognitive theory can be applied to the testing and teaching of intelligence. The article is divided into three main parts. The first part describes how the study of intelligence, traditionally an area that has been viewed as under the purview of differential psychology, has come squarely into the purview of cognitive psychology. The second part describes how the testing and teaching of intelligence, which in the past have been largely atheoretical, have been transformed into theoretically based enterprises guided by the theories of cognitive psychology. The last part describes a particular theory of intelligence, the triarchic theory, and how it has been applied to the problems of testing and teaching intelligence. It is concluded that cognitive psychology has given the study of intelligence a ‘new lease on life’, and that the testing and teaching of intelligence can and should be viewed as a primary focus of application for the principles of cognitive psychology.     

Piagetian tasks measure intelligence and intelligence tests assess cognitive development: A reanalysis

A reanalysis of the intercorrelations of Wechsler subtests, achievements tests, and Piagetian tasks originally published by Stephens et al. (1972) has corrected errors in the original design and has used models which allow both differences and similarities to appear. Unit weighted composites of the two sets of tests were formed after first partialling chronological age out of the complete table of intercorrelations. The correlation between the composites is .876 which corrects, using split-half estimates of reliabilities, to .918. Next the matrix of partial correlations was factored and the factors rotated to a hierarchical structure. Piagetian tasks contribute almost equally to the definition of the general factor in intelligence along with the Wechsler subtests and the achievement tests. The general factor, furthermore, makes the single largest contribution to the variance of most of the measures of both sets. The smaller group factors consist of an Academic Achievement factor and three Piagetian factors. Of the latter the largest and most clearly identified is the factor called Operational Thought in the earlier analysis, but is here described simply as Conservation. It is concluded that the evidence for communality in function far outweighs the differences between intelligence tests and Piagetian tasks.     

On the high intelligence and cognitive achievements of Jews in Britain

A number of studies in the United States have found that Jews obtain higher average IQs than white gentiles. This paper examines whether this is also the case in Britain. Three early studies are summarized that found that Jews in Britain have mean IQs in the range of 110–113. New data are presented for two nationally representative samples of 7–16 year olds in which Jews had mean IQs of 108.5 and 107.7. Taking all five studies into account, it is proposed that the best reading of the IQ of Jews in Britain is 110. It is proposed that the best reading of the IQ of Jews in the United States is 109.5. Data are presented for the numbers of Jewish Fellows of the Royal Society in relation to their proportion in the population. It is found that Jews were over-represented by a factor of 3.7 in the years 1901 through 1940 and by a factor of 7.6 in the years 1950 through 2003. Data are also presented for the numbers Jewish Nobel prize-winners in Britain and the United States for 1901 through 2003. It is shown that Jews are over-represented among Nobel prize-winners by a factor of 8.0 in Britain and 12.3 in the United States. It is proposed that the over-representation of Jews among Nobel prize-winners can be partly explained by the higher average Jewish IQ.     

Effects of active and passive EMG biofeedback training on performance of motor and cognitive tasks.

The goal of this study was to compare the effects of general relaxation (passive group) and neuromuscular tension control (active group), both using EMG biofeedback techniques, on the performance of memorization, simple reaction time, and rotary pursuit. 18 subjects were given five consecutive daily sessions of training or were placed under control conditions, after which their performance on these various tasks was evaluated. Results indicate that control of neuromuscular tension seemed to facilitate performance on all tasks over that of the control group. Except for simple reaction time, there was no difference between the "active" and "passive" groups. The results are interpreted in terms of factors in selection of subjects and experimental conditions.     

Midsagittal brain shape correlation with intelligence and cognitive performance

Brain shape might influence cognitive performance because of the relationships between functions, spatial organization, and differential volumetric development of cortical areas. Here we analyze the relationships between midsagittal brain shape variation and a set of basic psychological measures. Coordinates in 2D from 102 MRI-scanned young adult human brains were superimposed through a Procrustes approach, and the residual variation was regressed onto 21 cognitive tests performed by the same individuals. Most of the composite and specific variables (including general intelligence, working memory, attention, and executive functions) do not show meaningful correlations with midsagittal brain morphology. However, variables related to mental speed display subtle but consistent correlations with brain shape variation. Such correlations are small, suggesting that the influence of midsagittal brain geometry on individual cognitive performance is negligible. Nevertheless, this evidence can supply information on brain biology and evolution. Areas associated with the parietal cortex appear to be involved in relationships between brain geometry and mental speed. These areas have been associated with relevant endocranial differences between living and extinct humans, and are important as functional and structural components of brain organization. The limited correlation between brain geometry and mental speed among modern individuals might be more relevant when the large paleoneurological variation of the genus Homo is taken into account.     

Faking on self-report emotional intelligence and personality tests: Effects of faking opportunity, cognitive ability, and job type

We assessed the combined effects of cognitive ability, opportunity to fake, and trait job-relevance on faking self-report emotional intelligence and personality tests by having 150 undergraduates complete such tests honestly and then so as to appear ideal for one of three jobs: nurse practitioner, marketing manager, and computer programmer. Faking, as expected, was greater (a) in higher-g participants, (b) in those scoring lower under honest conditions (with greater opportunity to fake), and (c) on job-relevant traits. Predicted interactions accounted for additional unique variance in faking. Combining all three factors yielded a “perfect storm” standardized difference of around 2, more than double the overall .83 estimate. Implications for the study of faking are discussed.     

Effects of bogus feedback on intelligence test performance

French-Canadian high school students (N = 196) completed different forms of the Wonderlic Personnel Test (WPT; E. F. Wonderlic, 1983) on two occasions. Before the second test, they received negative or positive bogus feedback about their initial performance. Most students (n = 158) were informed that the WPT measured intelligence, and the instruction was issued before either the first (n = 42) or the second test (n = 116). In the latter case, WPT validity either was not mentioned (n = 36) or was described as high or low (ns = 39 and 41, respectively). WPT performance improved on the second test, but it was not related to feedback in any of the instruction conditions. Reasons for these results and their practical implications are discussed.     

The structure of the relationship between attention and intelligence

The relationship between attention and general intelligence was investigated considering the different types of attention: alertness, sustained attention, focused attention, attentional switching, divided attention, attention according to the supervisory attentional system, attention as inhibition, spatial attention, attention as planning, interference, attention as arousal, and attention according to the assessment tradition. In a sample of 197 participants the relationship of attention and intelligence was investigated by means of structural equation modeling. The results revealed that each type of attention was substantially related to intelligence on the latent level. Furthermore, a high degree of overlap in predicting intelligence was observed for the various types of attention. Comprehensive models based on resources theory and Posner's dimensions were also investigated. The best model of the relationship between attention and intelligence included two first-order and one second-order latent variables of attention and one of intelligence. It predicted 32% of the variance of intelligence.