Dissociation, cognitive failures, and working memory

The relationships between two personality measures (dissociation and cognitive failures) and different measures of interference from secondary tasks for working memory are investigated. Although the personality and cognitive measures were correlated with one another, canonical and bivariate correlations revealed no systematic relationships between the personality measures and the working memory measures. The upper bounds of the confidence intervals showed that, at most, only 10% of the variance was shared. We discuss the implications for theories of dissociation and cognitive functioning.     

The relationship between personality, approach to learning and academic performance

This study considers the relationship between students' approaches to learning, as measured by a short-form of Entwistle and Tait's (1995) Revised Approaches to Studying Inventory (RASI), the Big Five personality factors, as measured by Cattell's 16PFi, and the background variables of age, gender and prior educational achievement and academic performance. Subjects were 146 social science undergraduate students at a university in Scotland. Structural equation modelling identifies the Big Five personality factor scores account for between 22.7% and 43.6% of the variance across scores on the three approach to learning dimensions. Four of the Big Five personality factors and the three approach to learning dimensions were found to be poor predictors of academic performance. A linear regression analysis with academic performance as the dependent variable and age, prior educational attainment and conscientiousness as independent variables, accounted for 24.1% of the variance in performance. Our investigation suggests approach to learning is a subset of personality. However, we conclude it makes sense to measure these two groups of variables separately in educational settings.     

Cognitive functioning of older people in relation to social and personality variables

Age differences in performance on memory measures and in subjective ratings of memory adequacy were examined in the context of 12 social, personality, adjustment, and lifestyle measures. Participants were 285 men and women, aged 65 to 93, of middle- and working-class backgrounds. A series of multivariate and univariate analyses revealed that a large proportion of the age differences and virtually all of the social-class differences on memory measures could be accounted for by contextual variables, with education, intellectual activity, extroversion, neuroticism, and lie scores (on the Eysenck Personality Inventory) all accounting for more of the variance in memory performance than did age. Self-rated memory adequacy was not correlated with performance, and although the expected finding of lower ratings by older participants was obtained with the working-class group, the opposite was true for the middle-class group. Implications of these results for understanding age differences in memory are discussed.     

Individual differences in everyday retrospective memory failures

The present study examined individual differences in everyday retrospective memory failures. Undergraduate students completed various cognitive ability measures in the laboratory and recorded everyday retrospective memory failures in a diary over the course of a week. The majority of memory failures were forgetting information pertaining to exams and homework, forgetting names, and forgetting login and ID information. Using latent variable techniques the results also suggested that individual differences in working memory capacity and retrospective memory were related to some but not all everyday memory failures. Furthermore, everyday memory failures predicted SAT scores and partially accounted for the relation between cognitive abilities and SAT scores. These results provide important evidence for individual differences in everyday retrospective memory failures as well as important evidence for the ecological validity of laboratory measures of working memory capacity and retrospective memory.     

Developmental factors and performance in remedial courses

This study investigated the relations between various developmental factors and performance in remedial courses. The Iowa Developing Autonomy Inventory, Iowa Managing Emotions Inventory, and Iowa Developing Competency Inventory were administered to 231 students enrolled in a developmental studies program at a large state university (enrollment about 25,000). Regression analyses indicated that various developmental measures accounted for a small effect (amount of variance accounted for ranged from 2% to 7%) on performance in remedial courses. The percentage of variance accounted for by the three inventories was similar to what could be accounted for by more traditional measures of SAT scores and high-school grade point averages. The percentage of variance accounted for by traditional measures ranged from 2% to 10%.     

Fluid intelligence, memory span, and temperament difficulties predict academic performance of young adolescents

There are several candidate measures when asking which psychological construct significantly predicts academic performance. Hundreds of studies have addressed this issue by measuring intelligence, basic cognitive processes, or personality. However, the simultaneous consideration of a broad and varied array of measures is much less common. Here we consider several cognitive and personality measures concurrently to define latent factors representing six constructs of presumed interest: fluid intelligence, short-term memory, working memory, processing speed, controlled attention, and temperament difficulties. One hundred and thirty-five secondary school students were tested. Their academic performance was measured by average grades in the nine scholastic areas of their curriculum. The main finding shows that a latent factor defined by fluid intelligence and memory span along with a latent factor defined by impulsiveness, sensation seeking, and lack of fear account for an impressive figure of 60% of the variance in academic performance.     

The Association Between Health and Cognitive Performance in a Population-Based Study of Older Adults: The Charlotte County Healthy Aging Study (CCHAS)

In the present study, the relationship between self-reports and objective measures of health status and measures of cognitive performance was examined. Participants consisted of 437 persons (M =72.91 years) from the Charlotte County Healthy Aging Study, a population-based sample of older adults. Cognitive performance was assessed by tests of episodic memory, perceptual speed, and attention. Health status was indexed by subjective ratings, self-reports, and objective measures. The health measures accounted for significant variance on both the Trailmaking A and B tests, accounting for a modest amount of variance (4.4% and 1.1%, respectively). The health measures were not significantly associated with performance on the measures of attention or episodic memory. The results suggest that health status is associated with processing speed to a greater degree than higher order cognitive processes.     

Social Networking Websites,Personality Ratings,and the Organizational Context: More Than Meets the Eye?1

We examined the psychometric properties of the Big Five personality traits assessed through social networking profiles in 2 studies consisting of 274 and 244 social networking website (SNW) users. First, SNW ratings demonstrated sufficient interrater reliability and internal consistency. Second, ratings via SNWs demonstrated convergent validity with self‐ratings of the Big Five traits. Third, SNW ratings correlated with job performance, hirability, and academic performance criteria; and the magnitude of these correlations was generally larger than for self‐ratings. Finally, SNW ratings accounted for significant variance in the criterion measures beyond self‐ratings of personality and cognitive ability. We suggest that SNWs may provide useful information for potential use in organizational research and practice, taking into consideration various legal and ethical issues.     

Personality as a Source of Individual Differences in Cognition among Older African Americans

Previous research suggests that demographic factors are important correlates of cognitive functioning in African Americans; however, less attention has been given to the influence of personality. The present study explored how dimensions and facets of personality predicted individual variability in cognition in a sample of older African Americans from the Baltimore Study of Black Aging. Cognition was assessed by verbal learning and attention/working memory measures. Personality was measured by the NEO Personality Inventory-Revised. Linear regressions controlling for demographic factors showed that Neuroticism, Openness, and Agreeableness were significant regression predictors of cognitive performance. Individual facets of all five personality dimensions were also associated with cognitive performance. These findings suggest personality is important in understanding variability in cognition among older African Americans.     

The Relationship between Physical and Social Reasoning in Adolescents

The relationship between physical reasoning and interpersonal reasoning was examined by devising group-administered written measures of interpersonal reasoning tasks (social guessing games) and giving these and standard physical reasoning tasks to 11-year-old children (N = 106). A factor analysis revealed two factors: Physical reasoning accounted for 42% of the variance, and social reasoning accounted for 17% of the variance. This supports the proposition that social reasoning is distinct from physical reasoning, but performance on all reasoning tasks may depend upon structures of both types.     

Facets of personality and the phenomenology of autobiographical memory

The relationship between individual differences in autobiographical memory and personality was examined by having 118 undergraduates complete the NEO Personality Inventory after rating 15 word‐cued autobiographical memories on 20 scales. The Openness to Feelings facet (O3) correlated with measures of belief in the accuracy of memories, recollection, sensory imagery and emotion. Four other facets had correlations with belief (A3—Altruism, E1—Warmth, E4—Activity, E6—Positive Emotions). These facets also deal with emotional components of personality. In multiple regressions, measures of belief and measures of recollection were predicted by different variables, and for measures of belief, the O3 facet increased the variance accounted for beyond that of just the cognitive variables. Our results are consistent with and extend studies of the effects of depression and emotional suppression on autobiographical memory. Copyright © 2004 John Wiley & Sons, Ltd.     

The influence of visual ability on learning and memory performance in 13 strains of mice

We calculated visual ability in 13 strains of mice (129SI/Sv1mJ, A/J, AKR/J, BALB/cByJ, C3H/HeJ, C57BL/6J, CAST/EiJ, DBA/2J, FVB/NJ, MOLF/EiJ, SJL/J, SM/J, and SPRET/EiJ) on visual detection, pattern discrimination, and visual acuity and tested these and other mice of the same strains in a behavioral test battery that evaluated visuo-spatial learning and memory, conditioned odor preference, and motor learning. Strain differences in visual acuity accounted for a significant proportion of the variance between strains in measures of learning and memory in the Morris water maze. Strain differences in motor learning performance were not influenced by visual ability. Conditioned odor preference was enhanced in mice with visual defects. These results indicate that visual ability must be accounted for when testing for strain differences in learning and memory in mice because differences in performance in many tasks may be due to visual deficits rather than differences in higher order cognitive functions. These results have significant implications for the search for the neural and genetic basis of learning and memory in mice.     

Individual differences in self-initiated processing at encoding and retrieval: a latent variable analysis

The current study examined individual differences in self-initiated processing (SIP) in memory tasks. Participants performed four memory tasks that varied the amount of SIP required at encoding, retrieval, or both as well as cognitive ability measures. It was found that the correlation between recall performance and cognitive abilities changed as a function of the amount of SIP required. Additionally, it was found that although both free and cued recall measures accounted for variance in cognitive abilities, only the free recall accounted for unique variance in cognitive abilities. It is suggested that the predictive power of a task is determined in part based on the amount of SIP required.     

Individual differences in self-initiated processing at encoding and retrieval: A latent variable analysis

The current study examined individual differences in self-initiated processing (SIP) in memory tasks. Participants performed four memory tasks that varied the amount of SIP required at encoding, retrieval, or both as well as cognitive ability measures. It was found that the correlation between recall performance and cognitive abilities changed as a function of the amount of SIP required. Additionally, it was found that although both free and cued recall measures accounted for variance in cognitive abilities, only the free recall accounted for unique variance in cognitive abilities. It is suggested that the predictive power of a task is determined in part based on the amount of SIP required.     

Personality traits,learning stratigies,and performance

The objective of this research is to analyse the relationships between personality traits, learning strategies, and performance. Two multivariate studies (N=139 and N=92) were conducted. In both studies factor analyses of the learning strategies yielded two factors. One factor, labelled, ‘learning discipline’, correlated highly with the Conscientiousness scale and the other factor, labelled, ‘elaboration’, correlated with the Openness of Experience scale. In Study 1, about 17 per cent of the variance in college grades was accounted for by personality scales and learning strategies. In Study 2, learning strategies accounted for about 31 per cent of the variance in college grades. Path analyses showed that the relations between basic personality traits and grades were mediated by the learning strategies.     

Personality predicts prospective memory task performance: an adult lifespan study

Do interindividual differences in prospective memory task performance reflect individual differences in personality and lifestyle? Do the cognitive abilities known to change with age retain their power to predict episodic prospective memory task performance after controlling for personality and lifestyle variables, and do personality and lifestyle variables offer predictive power apart from that provided by cognitive ability measures? To answer these questions, we conducted a study with community‐living healthy individuals (n= 141) between 18 and 81 years of age. They completed three different episodic prospective memory tasks – two laboratory tasks and one field task – as well as various measures of personality, lifestyle, and cognitive ability. The results indicated that personality and lifestyle reliably predicted who will succeed and who will fail on all three episodic prospective memory tasks. Conscientiousness predicted performance on two of the prospective memory tasks; socially prescribed perfectionism and neuroticism each predicted performance on one of the prospective memory tasks. Cognitive ability predicted performance on one of the laboratory prospective memory tasks but not on the other two prospective memory tasks. After we controlled for individual differences in personality and lifestyle variables, cognitive ability was no longer able to predict performance on the laboratory prospective memory task. By contrast, controlling for cognitive ability had no influence on the predictive power of the personality and lifestyle variables.     

Self-image disparity, repression-sensitization, and extraversion-introversion: a unitary dimension?

To determination (1) whether self-image disparity, repression-sensitization, and extraversion-introversion intercorrelated to a degree indicative of a unitary personality dimension and, (2) whether the interrelationships among these variables was accounted for by cognitive developmental variance, Byrne's Revised Repression-Sensitization Scale, Giedt and Downing's Extraversion-Introversion Scale, and two measures of self-image disparity were administered to 20 male college freshmen and 20 male seniors. All the correlations among the four measures were significant, but none correlated significantly with cognitive development, as measured by SATs. Factor analysis yielded a clearcut personality factor and a clearcut cognitive factor, indicating that the personality measures reflect a unitary dimension, even after cognitive developmental variance is extracted.     

Cognitive and Personality Predictors of Leader Performance in West Point Cadets

The question of how to develop effective leaders is one of major importance to military organizations. This study, which examines a large cohort of U.S. Military Academy cadets over time, tests the influence of cognitive and personality variables on military leadership performance over a 4-year period. Hierarchical multiple regression procedures are used to identify factors at entry into the Academy that successfully predict military development grades as upperclassmen, 3 to 4 years later. A moderately stable cross-validated model reveals cognitive factors (college entrance scores, social judgment skills, and logical reasoning) and personality factors (agreeableness and conscientiousness) that contribute to later leader performance. A main effect for gender on leader performance was also identified, with women performing better than men. The amount of variance in leader performance scores accounted for by variables examined here, although modest, is notable considering the time interval involved. Nevertheless, future studies should explore additional factors, particularly personality ones, that may influence leader performance in developing leaders.     

Construct validity and age sensitivity of prospective memory

We administered four prospective memory tasks to 330 adults between 18 and 89 years of age to investigate the relationship among the measures of performance in the four tasks, as well as the relationship of the prospective memory measures to age, other cognitive abilities, and noncognitive factors. The four prospective memory variables were found to exhibit both convergent and discriminant validity, indicating that prospective memory ability appears to represent a distinct dimension of individual differences. The prospective memory construct was significantly related to other cognitive abilities, such as executive functioning, fluid intelligence, episodic memory, and perceptual speed, but it was only weakly related to self-ratings of (primarily retrospective) memory and to personality traits. Although a substantial proportion of the age-related variance on the prospective memory construct was shared with other cognitive abilities, we also found some evidence of unique, statistically independent, age-related influences on prospective memory.     

Executive functioning and memory as potential mediators of the episodic feeling-of-knowing accuracy

The study focused on the cognitive determinants of the accuracy of feeling-of-knowing (FOK) judgments made on episodic memory information. An individual differences approach was used on a sample of healthy older adults assessed on an episodic FOK task and on several neuropsychological measures. At a global level of analysis of FOK accuracy, the contributions of four general cognitive processes--episodic memory, executive functioning, fluid intelligence and processing speed--were examined concurrently. Stepwise regression analyses showed that executive functioning accounted for the major part of variance on FOK accuracy, followed by a significant contribution of episodic memory. After controlling for executive and memory involvement, fluid intelligence and processing speed no longer accounted for significant variance. At a more detailed level of analysis of FOK accuracy, the contributions of three specific executive processes--shifting, updating and inhibition--were assessed. The results revealed shifting function as the primary executive process engaged in the production of accurate FOK judgments in episodic memory. Some hypotheses are put forward to better understand the central role of executive functioning in the production of accurate FOK judgments.