- Research article
- Open Access
Five-factor model personality traits and cognitive function in five domains in older adulthood
BMC Geriatrics volume 19, Article number: 343 (2019)
Five-factor model (FFM) personality traits have been associated consistently with risk of Alzheimer’s disease and related dementias (ADRD). Less is known about how these traits are associated with functioning in specific domains of cognitive function in older adulthood.
Participants (N = 2865) were drawn from the 2016 Harmonized Cognitive Assessment Protocol sub-study of the Health and Retirement Study (HRS). Participants completed a battery of cognitive tasks that measured performance in five domains: Memory (eight tasks), speed-attention-executive (five tasks), visuospatial ability (three tasks), fluency (one task), and numeric reasoning (one task). Participants completed an FFM personality measure as part of the regular HRS assessment in either 2014 or 2016. Linear regression was used to examine the association between the traits and each cognitive task and composite scores for the five domains, controlling for age, sex, race, ethnicity, and education. We also tested whether the associations were moderated by these sociodemographic factors or mental status.
Neuroticism was associated with worse performance on all of the cognitive tasks. Conscientiousness was associated with better performance across all five cognitive domains, although not necessarily with every task. Openness and Agreeableness were associated with better performance in all domains, except for numeric reasoning. Extraversion was associated with better speed-attention-executive and fluency. There was no robust evidence that the association between personality and cognition was moderated by sociodemographic characteristics or global cognitive function.
Personality traits have pervasive associations with functioning across five cognitive domains. Consistent with the literature on personality and risk of ADRD, Neuroticism and Conscientiousness were associated with cognitive performance in the expected direction in all domains. Extraversion was the only trait that showed domain-specific associations. The present research supports models of personality and health in the context of cognition and suggests that personality is associated with intermediate markers of cognitive health.
Five Factor Model (FFM) personality traits  are associated consistently with significant cognitive impairment. In particular, individuals who score higher in Neuroticism (the tendency to experience negative emotions and stress) or lower in Conscientiousness (the tendency to be organized, disciplined, and responsible) are at greater risk of both mild cognitive impairments  and of Alzheimer’s disease . Much of the work on personality and cognition in older adulthood has focused on global cognitive outcomes. And yet there are many cognitive domains that contribute to overall cognitive health . The present research addresses five common domains of function : Episodic memory, speed-attention-executive, visuospatial ability, fluency, and numeric reasoning. Episodic memory is memory for specific events in time and place. It includes memory for personal events that range from the distant past to events that just happened in the current moment. It is often measured with word lists that participants recall immediately and after a short delay. Speed and attention are functions that assess how quickly someone can respond to a stimulus (speed) and how well they can attend to the stimulus (attention); executive function includes these basic functions as well as cognitive flexibility. Visuospatial ability is the ability to visualize, rotate, and manipulate shapes in more than one dimension. Fluency is the ability to produce and use words correctly. Finally, numeric reasoning is the ability to manipulate numbers and includes basic arithmetic.
There are a number of reasons why personality traits may be associated with performance on cognitive tasks. Individuals who score higher in Neuroticism, for example, tend to be anxious and vulnerable to stress  and have self-presentational concerns around other people . Such anxiety and self-conscientiousness are likely to inhibit performance on tasks administered in the presence of a tester. And indeed, individuals higher in Neuroticism tend to remember fewer words , respond slower on response time tasks [9, 10], have worse visuospatial performance , and produce fewer words on fluency tasks . The associations between Extraversion (the tendency to be outgoing, sociable, and active) and cognition, in contrast, appear to be more domain specific. Extraversion has been associated with faster performance  and greater verbal fluency , whereas the association with episodic memory is more mixed [8,9,10], and it tends to be unrelated to visuospatial ability and numeric reasoning. These domain-specific associations are consistent with characteristics of this trait that include talkativeness  and vigor . Cognitive flexibility and verbal abilities are core characteristics of Openness . And, as expected, this trait tends to be related to better performance on tasks that include a verbal component  and on tasks that require cognitive flexibility [16, 17]. Agreeableness (the tendency to be trusting and empathetic) is sometimes associated with greater dementia risk  but is not associated consistently with performance on cognitive tasks . Finally, Conscientiousness is associated with achievement striving and organization and a lifestyle that supports maintaining cognitive health across adulthood . As such, it tends to be associated with better performance on a range of tasks [8, 11], but the associations are not always consistent . For example, some find positive associations between Conscientiousness and better performance in tasks that measure speed, attention, and executive function  and others find no relation [10, 17, 21]. These differences may be due, in part, to differences in sample size (effects are generally modest and require large sample sizes for adequate power), differences in sample population (e.g., older versus younger adults; clinical versus nonclinical populations), and/or differences in measurement of both personality and tasks that measure speed, attention, and executive function. More broadly, and for these reasons, it is challenging to synthesize the literature on personality and measures of performance in these five cognitive domains. Focusing on large sample studies (N > 1000) that include validated measures of personality and cognition, the strongest evidence that personality is associated with specific cognitive domains is for the domains of memory and verbal fluency. In large samples of older adults, for example, higher Neuroticism tends to be associated with worse memory performance, whereas higher Openness and Conscientiousness tend to be associated with better memory [8, 22]. Further, our recent meta-analysis on personality and verbal fluency (meta-analytic N > 85,000) indicated that higher Neuroticism was associated with lower fluency whereas higher Extraversion, Openness, and Conscientiousness were associated with greater fluency . As such, stronger hypotheses can be made for memory and fluency based on this previous literature than for speed-attention-executive, visuospatial ability, and numeric reasoning.
The literature on personality and cognition suggests that the traits may have differential associations with different aspects of cognitive function. Previous research on personality and cognition has tended to focus on one or two personality traits (typically Neuroticism and Extraversion) and/or individual cognitive functions (e.g., episodic memory). Although there is growing recognition of the importance of including all five traits and tasks from multiple cognitive domains, such studies remain relatively rare. The present research sought to unify the literature by examining the association between all FFM traits and five common domains of cognitive function in a relatively large sample of older adults. The large sample also allowed us to examine whether the associations varied by sociodemographic characteristics. Based on the literature on personality and cognition, we expected higher Neuroticism to be associated with worse performance on all of the cognitive tasks and higher Conscientiousness and Openness to be associated with better performance. In contrast, we expected higher Extraversion to be associated with better performance on speed and fluency tasks. We did not expect Agreeableness to be associated with the cognitive tasks. In addition to the main effect, we examine whether the association between personality and cognition is moderated by age, sex, race, ethnicity, education, or global cognitive function.
Participants and procedure
Participants were part of the 2016 Harmonized Cognitive Assessment Protocol (HCAP), an ongoing sub-study of the Health and Retirement Study (HRS). Participants were selected to be a part of the HCAP assessment if they were 65 years or older and completed the 2016 interview of the HRS. Of the eligible participants, a subset was randomly selected and invited to participate in the HCAP assessment (N = 5500). A total of 3496 participants completed at least some part of it. Participants could have the HCAP assessment administered in either English or Spanish. Participants who also completed the personality measure in either the 2014 or 2016 regular HRS assessment were selected for analysis. A total of 2865 participants had complete data on personality and some measures in HCAP. The sample was on average 76.49 (SD = 7.36) years old, with 66% of the sample between the ages of 65–79, 30% between the ages of 80–89, and 4% over the age of 90. The sample was 60% female, 14% African American, 9% Hispanic, and had an average of 12.93 (SD = 2.98) years of education. By comparison, the Census estimates that the US population aged 65 and older is 56% female, 9% African American, 8% Hispanic, and that 84% of this population had completed high school .
Analytic samples ranged from 2456 (numeric reasoning) to 2814 (CERAD immediate recall, verbal fluency) based on missing data across the cognitive tasks. Compared to participants who had the personality assessment available, participants without the personality assessment and thus not included in the analyses (n = 629) were older (d = .24, p < .01), more likely to be Hispanic (χ2 = 38.16, p < .01), more likely to be a race other than white (χ2 = 59.85, p < .01), and had fewer years of education (d = .38, p < .01); there was no difference in participant sex. Further, there were differences on all of the cognitive tasks, with ds that ranged from .30 (p < .01; Backward Count) to .71 (p < .01; Mini Mental State Examination); across all cognitive tasks, participants who also had the personality assessment performed better than participants who did not have personality. More information on the HCAP assessment, sampling, and how to obtain the data can be found at https://hrs.isr.umich.edu/news/2016-harmonized-cognitive-assessment-protocol-hcap-early-version-10. The Health and Retirement Study make their data available to the public, but access to the HCAP data requires an additional authentication process to verify the identity of the person and institute requesting access to the data. We acquired this administrative permission to access the HCAP data. Information about how to access the HCAP data can be found at https://hrs.isr.umich.edu/data-products/cognition-data. The Institutional Review Board at the Florida State University approved this research (protocol #IRB00000446, “Secondary Data Analysis of Public Health Databases”).
Participants completed the Midlife Development Inventory (MIDI ) as part of the Leave-Behind Questionnaire in either 2014 or 2016. The MIDI assesses FFM personality traits with 26 adjectives. Items on the MIDI measured Neuroticism (e.g., moody; alpha = .71), Extraversion (e.g., talkative; alpha = .75), Openness (e.g., creative; alpha = .80), Agreeableness (e.g., helpful; alpha = .79), and Conscientiousness (e.g., organized; alpha = .71). Items were rated on a scale from 1 (a lot) to 4 (not at all) and reverse scored in the direction of the trait label. The mean was taken across items for each trait (range 1–4).
HCAP is an extensive assessment of cognitive function that covers the domains of episodic memory, speed-attention-executive, visuospatial ability, fluency, and numeric reasoning. Detailed information about test administration and scoring can be found in Weir and colleagues .
Participants completed several measures of episodic memory, measured as immediate recall, delayed recall, and recognition. Participants completed the CERAD Word List Learning and Recall Task. Participants were presented visually with a list of 10 words, two seconds at a time for each word. Participants read each word and after the last word were asked to recall as many words from the list as possible (immediate recall). After a short delay, participants were again asked to recall as many words from the list as possible (delayed recall). Finally, participants were shown 10 target words and 10 foils and were asked to indicate which words were on the original list (recognition). Participants also completed two story memory tasks: Brave Man and the Wechsler Memory Scale Logical Memory I. Both tasks involved being read a passage and being asked to report back the main points of the story immediately and after a short delay. The Logical Memory task also included a recognition test, in which participants were asked 15 yes/no questions about the story.
This domain was assessed with several tasks. In the Letter Cancellation Test, participants were given one minute to cross out as many “P” and “W” letters as possible from a large grid of letters. The score was the last letter gotten to at the one-minute mark. Participants completed the Backward Count task as a measure of processing speed in which they counted backward from 100 as fast as possible. The count of numbers said in 30 s was the score. The Symbol-Digit Modalities Test had random geometric figures and a separate key that paired numbers with each figure. Participants were asked to substitute a number for each figure on the sheet of paper. The score was the number of correct pairings made in 90 s. The Trail Making Test had two parts. Part A was a sheet of numbers in circles on a page and participants were asked to connect the consecutively numbered circles as fast as possible. Trails B included letters as well as numbers and participants had to switch between numbers and letters as quickly as possible. For both parts, the outcome was time to complete the task (i.e., slower times indicated worse performance).
The CERAD Constructional Praxis task required participants to copy geometric forms that varied in difficulty both immediately and after a short delay. Note that performance on the delay task reflects visual memory as well as visuospatial ability. Raven’s Standard Progressive Matrices were geometric pictures with a small section missing. Participants were asked to choose the correct picture from a set that correctly completed the picture. Participants completed 17 pictures from the total Raven’s test.
Fluency was measured with a semantic verbal fluency task. Specifically, participants were asked to name as many animals as possible in 60 s.
The HRS number series was a measure of numeric reasoning. Participants were presented with a series of numbers with one or two numbers missing. Participants were asked to identify the missing numbers. The test was not timed and participants could take as much time as necessary to complete it. The test was adaptive, such that items got more or less difficult depending on participants’ responses.
Global cognitive function
Finally, participants completed the Mini-Mental State Examination (MMSE) as a measure of global cognitive function . The MMSE was used to test cognitive status as a moderator of the relation between personality and the cognitive tasks and not as an outcome. The total MMSE score was dichotomized into no impairment (≥24, coded as 0) and any impairment (≤23, coded as 1).
Covariates were self-reported age in years, sex (female = 1, male = 0), race (African American = 1 [dummy variable 1], other/unknown = 1 [dummy variable 2] both compared to white = 0], Hispanic ethnicity (1 = yes, 0 = no), and education in years. Some participants chose to have the HCAP administered in Spanish. We included language of administration (0 = English, 1 = Spanish) as a covariate.
We used linear regression to examine the association between personality and the cognitive measures. Specifically, each cognitive task was predicted separately by each trait, controlling for age, sex, race, ethnicity, education, and language of HCAP administration. For the domains with multiple tasks (episodic memory, speed-attention-executive, visuospatial ability), in addition to the individual tasks, the score for each task was standardized and then the mean taken across the tasks within the domain as an overall measure of the domain (Trails A and Trails B were multiplied by − 1 to reverse the direction of the scoring to be consistent with the scoring of the other tasks in this domain). We then tested whether the association between personality and each domain was moderated by age, sex, race, ethnicity, education, or mental status. Finally, we did a threshold analysis to test whether the traits were associated with performance below a threshold. Specifically, we tested whether personality was associated with risk of performing at least one standard deviation below the mean (a relatively arbitrary but standard cutoff for threshold analyses) for each of the five domains. For all analyses, p was set to <.01, two-tailed.
Descriptive statistics for all study variables are shown in Table 1. Bivariate correlations between the traits and the cognitive tasks are shown in Additional file 1: Tables S1, S2, and S3. Although there were some minor violations of the assumptions of linear regression, the bivariate correlations were similar across the Pearson correlations (parametric) and Spearman correlations (nonparametric) that suggest the associations found in the regression analyses are not simply due to violations of the assumptions of linear regression. Tables 2, 3, and 4 show the association between personality and performance across the five domains of cognitive function. Note that for all analyses, the pattern of associations and significance was identical when outliers were removed from the analysis. Several patterns emerged from the analyses that were consistent with our hypotheses. First, Neuroticism was associated with worse performance on every cognitive task: Individuals higher in Neuroticism performed worse on measures of episodic memory, speed-attention-executive, visuospatial ability, fluency, and numeric reasoning. Second, although not apparent across all individual tasks, higher Openness and higher Conscientiousness were both associated generally with better performance. Third, the association between Extraversion and cognition was limited to better performance in the speed-attention-executive and fluency domains; Extraversion was unrelated to episodic memory, visuospatial ability, and numeric reasoning. Fourth, although unexpected, Agreeableness was associated with better performance in four out of the five domains (all domains except numeric reasoning). Fifth, the personality traits tended to have more associations with the speed-attention-executive and fluency tasks than the other cognitive functions. Within the memory domain, the traits had more associations with the word list learning and recall tasks than with the story memory tasks. Finally, as could be expected, the associations were slightly stronger with the scores combined across tasks, and the effect sizes were generally small. For episodic memory, the adjusted R2 was .278 for the covariates only model and change in adjusted R2 ranged from .004 (Agreeableness and Conscientiousness) to .009 (Neuroticism) for personality. For speed-attention-executive, the adjusted R2 was .391 for the covariates only model and change in adjusted R2 ranged from .005 (Extraversion) to .015 (Conscientiousness) for personality. For visuospatial ability, the adjusted R2 was .313 for the covariates only model and change in adjusted R2 ranged from .000 (Extraversion) to .011 (Openness) for personality. For fluency, the adjusted R2 was .205 for the covariates only model and change in adjusted R2 ranged from .003 (Neuroticism, Extraversion, and Conscientiousness) to .011 (Openness) for personality. For numeric reasoning, the adjusted R2 was .292 for the covariates only model and change in adjusted R2 ranged from .000 (Extraversion) to .005 (Neuroticism) for personality. See Additional file 1: Tables S4, S5, and S6 for full reporting of the adjusted R2 for each analysis.
There was little evidence that the associations between personality and the five cognitive domains were moderated by sociodemographic factors or mental status. There was a stronger association between Agreeableness and episodic memory at relatively lower than higher levels of education (βinteraction = −.04, p < .01), whereas higher education amplified the effect of Openness on fluency (βinteraction = .04, p < .01). There was also a stronger association between Neuroticism and visuospatial abilities at relatively older than younger ages (βinteraction = −.05, p < .01). Finally, although apparent across race, the association between Conscientiousness and visuospatial abilities was stronger among African American participants than white participants (βinteraction = .06, p < .01). None of the associations was moderated by sex, ethnicity, or global cognitive function. Further, the associations were similar when participants with cognitive impairment as indicated by the MMSE (n = 277) were excluded from the analysis.
Finally, the threshold analyses generally paralleled the linear regressions (Table 5). Specifically, higher Neuroticism was associated with a 20% (fluency) to 40% (speed-attention-executive) increased risk of poor performance, whereas lower Conscientiousness was associated with a 19% (fluency) to 39% (speed-attention-executive) increased risk. Extraversion was likewise associated with 16% (visuospatial ability) to 20% (speed-attention-executive and fluency) greater likelihood of better performance, Openness was associated with a 19% (episodic memory) to 35% (visuospatial ability) greater likelihood of better performance, and Agreeableness was associated with a 19% (visuospatial ability) to 33% (speed-attention-executive) greater likelihood of better performance. Of note, with the exception of Openness, the strongest associations in the threshold analyses were for the speed-attention-executive domain.
The present research used a large sample of older adults, a measure of all five FFM traits, and tasks that tap into five core domains of cognition to examine the relation between personality and specific cognitive functions. Consistent with the literature on personality and dementia risk , higher Neuroticism and lower Conscientiousness were associated with worse performance across the five domains. Openness likewise emerged as a broad correlate of better cognitive function, whereas the associations were more domain-specific for Extraversion. Surprisingly, Agreeableness was associated with better performance across most of the domains.
Several shared mechanisms are likely to contribute to the personality and cognition associations, but there are specific mechanisms that are potentially more relevant for some traits than others. For example, individuals higher in Neuroticism are prone to anxiety  and tend to perform worse in the presence of other people . Such self-consciousness and performance anxiety likely inhibit the ability to perform well, especially in front of a tester. Neuroticism is also associated with a number of risk factors for dementia that may contribute to worse performance on specific cognitive tests. Individuals higher in Neuroticism are more likely to be sedentary and less likely to engage in physical activity . They are also more likely to smoke  and experience depression . A physiological pathway is also possible. The stress hormones (e.g., cortisol ), neurotrophic factors (e.g., BDNF ), and systemic inflammation  associated with Neuroticism may also contribute to worse performance.
Achievement striving and industriousness are core components of Conscientiousness , and this tendency for working hard to be successful likely extends to cognitive tasks in at least two ways. First, this striving may help individuals develop skills and strategies that facilitate performance, especially for difficult tasks. Second, it may be motivation to try as hard as possible to perform well while completing the tasks. In addition, like Neuroticism, there are behavioral and physiological pathways that likely support better performance. Individuals higher in Conscientiousness engage in more frequent physical activity and tend not to be sedentary , they are less likely to smoke , and more likely to have healthier weight across adulthood . These healthier behaviors tend to protect cognitive function . Conscientiousness is also associated with healthier cardiometabolic  and inflammatory  profiles that may likewise serve to preserve cognition.
Openness traditionally has been associated with better performance on cognitive tasks. Of the five traits, it is the only one that has cognitive characteristics as a core component. That is, part of the definition of Openness is cognitive flexibility and engagement . This trait also has the strongest and most consistent associations with education: Individuals higher in Openness tend to achieve more years of education . It is of note, then, that the associations across the five cognitive domains in this research emerged independent of education. If education is not considered a confounding factor (i.e., openness is a determinant of educational achievement more than a byproduct), the associations between openness and cognition would generally have effect sizes that are twice as large. Like Neuroticism and Conscientiousness, there may be behavioral factors that mediate the relation between Openness and better cognitive performance in older adulthood. For example, individuals higher in Openness tend to eat healthier diets  and are more physically active . They also tend to engage in more cognitively demanding activities across the lifespan . The end result may be preserved cognitive function in older adulthood.
As expected, the association between Extraversion and cognition was limited to specific domains of function. Specifically, Extraversion was associated with better performance on tests of speed-attention-executive and fluency. These associations are likely a reflection of some of the core aspects of this trait. Individuals higher in Extraversion tend to talk more  and have more vigor . Such characteristics translate into a better ability to produce words from a specific category and faster reactions times. Previous research has suggested that Extraversion tends to be unrelated to episodic memory [9, 17]. We likewise found no association with memory, and that Extraversion was also unrelated to both visuospatial and numeric abilities. These domain-specific associations are consistent with the literature on Extraversion and cognitive impairment that indicates that Extraversion is unrelated to dementia risk . It suggests that the cognitive benefits associated with Extraversion are domain specific rather than generally protective of global cognition.
Surprisingly, Agreeableness was associated with four out of the five cognitive domains. When combined across multiple samples, there is some evidence for a small protective effect of Agreeableness on dementia risk . Still, it tends to be unrelated to specific cognitive functions [9, 17]. Thus, the fairly consistent positive associations across the tasks was unexpected. Individuals higher in Agreeableness tend to volunteer, especially in a critical time before the transition to older adulthood . Given that volunteering has been found to help maintain cognitive function , it may be one mechanism that contributes to the association between Agreeableness and better cognitive function in older adulthood. This pattern of associations, however, should be interpreted with caution until it is replicated.
It is of note that across the five domains, personality had the most associations with performance in the domain that measured speed-attention-executive. This pattern is consistent with research in other domains that indicates that individual differences in personality show stronger associations when more effort is needed to complete the task . For example, personality is unrelated to resting metabolic rate but the expected associations are apparent when participants are asked to walk as fast as possible . This pattern suggests that the characteristics of the traits that contribute to better performance are more engaged when there is a time component, and thus greater urgency, for performance.
Across traits and cognitive domains, the association between personality and cognitive performance was relatively small, with most associations ≤ .10. Given that cognitive performance is determined by factors that range from genetic  to environmental , it is not surprising that any individual factor, such as personality, would have a small association. It is of note, however, despite the small magnitude, the pattern of associations within and across cognitive domains was similar and consistent with the growing literature on personality and cognition [8, 11, 19, 22].
There was little evidence that the associations were moderated by sociodemographic characteristics or mental status. Even when moderation was found, the interactions indicated that the associations were slightly stronger in one group compared to the other. Overall, the lack of moderation indicates that the relation between personality and cognition is similar across socio-demographic groups (e.g., women and men, low and high education) and not dependent on overall global cognition. The latter finding is particularly noteworthy because personality traits maintain predictive power despite deterioration of cognitive abilities.
Lifespan models of personality and health posit that personality contributes to significant health outcomes across the lifespan through multiple mechanisms, including behavioral and physiological pathways . Such models are increasingly being applied to cognitive outcomes to better understand how personality contributes to risk of significant cognitive impairment in older adulthood [45, 46]. Within this context, the current research suggests that personality is also associated with intermediate markers of cognitive health in older adulthood that should be considered in the pathway to significant impairment. As such, the present research broadens lifespan models to create a more detailed approach to personality and cognition and begins to place cognitive performance in specific domains in the pathway from personality to significant cognitive outcomes.
This research had several strengths, including a relatively large sample of older adults, a validated FFM measure of personality traits, and standard tasks that measured five domains of cognitive function. This research also had several limitations. The speed-attention-executive domain, for example, could be considered as three separate domains instead of one. The tasks were combined under one domain because many of the tasks tapped in to multiple functions and thus could not differentiate between them. The associations at the task-level support the decision to collapse across the three functions (i.e., the results were similar across the tasks within the domain). Still, in future work it would be worthwhile to have multiple tasks that measure each of these components. In addition, we only had one measure of executive function (Trails B). Executive function is thought to be the integration of multiple functions (e.g., inhibitory control, working memory, cognitive flexibility ) but we could not address these individual functions in the present research. Finally, the data were cross-sectional and thus unable to speak to the temporal ordering of the relations. For example, severe cognitive impairment is associated with change in personality , although not prior to the onset of impairment . In future research, it would be important to have longitudinal assessments of both personality and cognition to examine their interrelations over time. Despite these limitations, the present research is a step toward better understanding the relation between personality and specific cognitive functions in older adulthood.
The present research indicates that FFM personality traits have differential associations with five domains of cognitive function. The findings show that traits that are associated consistently with dementia risk (Neuroticism, Conscientiousness) are also associated with intermediate markers of cognitive function. Such findings demonstrate the role of individual differences in psychological functioning in cognitive health in older adulthood.
Availability of data and materials
The datasets supporting the conclusions of this article are available for public download from HRS: http://hrsonline.isr.umich.edu/
Five Factor Model
Harmonized Cognitive Assessment Protocol
Health and Retirement Study
Mini-Mental State Examination
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This work was supported by the National Institute on Aging of the National Institutes of Health under Award Number R01AG053297, R21AG057917, and R56AG064952. The content is solely the responsibility of the authors (the funder had no role in the conduct of the research) and does not necessarily represent the official views of the National Institutes of Health. The Health and Retirement Study (HRS) is sponsored by the National Institute on Aging (NIAU01AG009740) and conducted by the University of Michigan.
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The Institutional Review Board at the Florida State University approved this research (protocol #IRB00000446, “Secondary Data Analysis of Public Health Databases”). Informed consent was not obtained because this research was analysis of deidentified secondary data.
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Additional file 1: Table S1. Pearson and Spearman Correlations Between Personality and Episodic Memory. Table S2. Pearson and Spearman Correlations Between Personality and Speed-Attention-Executive. Table S3. Pearson and Spearman Correlations Between Personality and Visuospatial Ability, Fluency, and Numeric Reasoning. Table S4. Adjusted R2 for each Regression Analysis Predicting Episodic Memory from Personality and the Covariates.Table S5. Adjusted R2 for each Regression Analysis Predicting Speed-Attention-Executive from Personality and the Covariates. Table S6. Adjusted R2 for each Regression Analysis Predicting Visuospatial Ability, Fluency, and Numeric Reasoning from Personality and the Covariates.
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Sutin, A.R., Stephan, Y., Luchetti, M. et al. Five-factor model personality traits and cognitive function in five domains in older adulthood. BMC Geriatr 19, 343 (2019). https://doi.org/10.1186/s12877-019-1362-1
- Cognitive function