Personality change across the life span: Insights from a cross-cultural, longitudinal study

Testing of significant changes in big-five personality factors over time in the presence and absence of memory impairment and life-related stress

This study tests whether memory impairment and perceived increases in stress due to life changes independently contribute to similar personality changes, such as increased neuroticism and decreased conscientiousness. Longitudinal data from 12,912 participants aged 50+ from the Health and Retirement Study (2006-2020) were analyzed using Latent Growth Curve Models (LGCMs). Six LGCMs were simultaneously estimated to examine how changes in personality across three data points spanning 8 years are predicted by both the classification of memory impairment (MI) statuses assessed via the Telephone Interview for Cognitive Status and estimated increases in life stress. Decreases were observed in all Big Five personality factors (B =  - 0.240/- 0.510, SE = 0.085/0.089) over the 8-year period. No significant differences in personality changes were found between MI cases and non-MI cases. Increased life stress was significantly associated with a rise in neuroticism (B = 0.587, SE = 0.094) and reductions in conscientiousness, extraversion, agreeableness, and openness (B ranges from - 0.223 to - 0.497). The findings emphasize adaptive/developmental shifts in personality in response to life stress rather than neuropathological ones related to memory impairment. Clinical assessment of personality changes in mid-to-late life should first consider psychological maladaptation to situational threats and challenges.

Impact of Early Personal Resources on Long-Term Psychosocial Outcomes After Moderate-to-Severe Traumatic Brain Injury: A Systematic Review

OBJECTIVE

To investigate the relationship between preinjury or early personal resources and long-term psychosocial outcomes following moderate-to-severe traumatic brain injury (TBI) and examine evidence for the stability of personal resources over time.

METHODS

The review protocol was registered with the International Register of Systematic Reviews (PROSPERO, Registration No. CRD4202341056). A search of PsycINFO, Cumulative Index to Allied Health Literature (CINAHL), MEDLINE, Scopus, and Web of Science was conducted from inception to February 23, 2023, for longitudinal studies involving adults with moderate-to-severe TBI that examined: (1) the relationship between preinjury or early personal resources (measured ≤6 months postinjury) and later psychosocial outcomes or (2) stability of personal resources over time with a minimum reassessment interval of 3 months. Two reviewers independently assessed eligibility and rated methodological quality of studies using a checklist informed by Strengthening the Reporting of Observational Studies in Epidemiology.

RESULTS

A narrative synthesis was conducted on 14 eligible articles summarizing 12 studies (N = 826). Nine studies examined the impact of preinjury or early personal resources on long-term psychosocial outcomes, most typically at 12 months postdischarge. Out of 9 studies 7 indicated that self-reported preinjury or early personal resources, including productive coping, higher self-esteem and resilience, and lower neuroticism, were associated with better psychosocial outcomes. Evidence from 7 studies examining the stability of personal resources over time was generally mixed, with personality changes (eg, neuroticism, conscientiousness, and extraversion) more evident from informant ratings than self-ratings.

CONCLUSION

Preinjury or early personal resources may influence later psychosocial outcomes after TBI. Further research is needed to investigate the stability of personal resources and factors mediating or moderating change across the adjustment trajectory.

Multicultural personality profiles and nursing student attitudes towards refugee healthcare workers: A national, multi-institutional cross-sectional study

BACKGROUND

Multicultural organizations in the era of globalization require intercultural leadership skills. Healthcare, as a sector serving diverse populations, necessitates culturally sensitive staff. Intercultural nurse education should start in undergraduate education. A tailored approach is needed, especially in the context of Poland's refugee crisis.

OBJECTIVE

To investigate how a multicultural personality profile and specific intercultural perspectives affect the attitudes of nursing students towards Ukrainian refugee background healthcare professionals.

DESIGN

A nationwide cross-sectional multicentre online survey study was conducted. The questionnaire was distributed with the aid of the Lime Survey web platform.

METHODS

The study utilized a Polish version of the Multicultural Personality Questionnaire. The questionnaire also included demographics and questions assessing intercultural competence and attitudes towards refugee medical professionals. K-Means Cluster Analysis was used to classify different patterns of multicultural personality. P-value <0.05 was deemed to be statistically significant.

PARTICIPANTS

The study sample consisted of 1325 undergraduate nursing students from 39 nursing schools in Poland: 54.0% in first year, 28.7% in second year, and 17.3% in third year. Most respondents were female (N = 1229, 90%).

RESULTS

Using cluster analysis respondents were categorized into four groups based on their level of three analyzed multicultural personality traits: cultural empathy, social initiative, and open-mindedness (high, low, average or mixed level). Statistical analysis demonstrated that personality profiles significantly affected nursing students' attitudes towards refugee health professionals (p = 0.003). Additionally, students' willingness to engage in intercultural communication classes and their belief in the learnability of intercultural competence also impacted their attitudes (p < 0.001 for both). Further analysis revealed correlations between personality profiles, belief in competency acquisition, and willingness to enhance competencies.

CONCLUSION

The design of intercultural competence education for undergraduate nursing students should be preceded by a mapping of the students' personality profile and a needs analysis in this regard, which may contribute to long-term effectiveness of such initiatives.

When daily emotions spill into life satisfaction: Age differences in emotion globalizing

Although the objective conditions of people's lives are fairly stable from day to day, daily life can feel like an emotional rollercoaster. For some people, life satisfaction hitches a ride on the emotional rollercoaster (i.e., momentary emotions spill over into broader evaluations of life). The extent to which positive and negative emotions spill over into life satisfaction is referred to as positive and negative emotion globalizing. Initial evidence suggests that emotion globalizing varies between individuals and is linked to a maladaptive psychological profile. Integrating a lifespan perspective, this is the first study to identify and describe age differences in emotion globalizing using data from two adult community samples (Study 1: N = 133 women, age range = 23-78; Study 2: N = 137, age range = 18-95). Further, we tested key boundary conditions of emotion globalizing by examining two types of emotions (i.e., current or after most stressful event of the day) and two types of satisfaction (i.e., overall life satisfaction [life satisfaction] or current day satisfaction [day satisfaction]). Specifically, we investigated how younger and older adults differed in the associations of current emotions with life satisfaction (i.e., emotion globalizing; Study 1), stressor-related emotions with life satisfaction (i.e., stressor-related emotion globalizing; Study 1), and stressor-related emotions with day satisfaction (Study 2). Results revealed that older (compared to younger) adults exhibited less negative (but not positive) emotion globalizing and stressor-related emotion globalizing. We found no age differences in the association between stressor-related emotions and day satisfaction. These findings extend insights into emotion globalizing and inform theories of emotional aging. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Longitudinal associations of neuroticism with life satisfaction and social adaptation in a nationally representative adult sample

OBJECTIVE

Correlational studies have frequently linked neuroticism to lower well-being and poorer social adaptation. In this study, we examined the longitudinal associations of neuroticism with life satisfaction and aspects of social adaptation (i.e., loneliness, number of close friends, and interpersonal trust).

METHOD

Cross-lagged panel models (CLPMs) and random intercepts cross-lagged panel models (RI-CLPMs) were used to analyze the prospective associations between variables in a nationally representative adult sample from Germany (N = 5,663 to 11,079 per analysis; 2-4 measurement waves with lags of 4-5 years).

RESULTS

CLPMs indicated that higher neuroticism was related to lower life satisfaction, higher loneliness, fewer friends, and lower interpersonal trust, but not vice versa. At the within-person level, RI-CLPMs revealed similar findings with increased neuroticism predicting decreases in life satisfaction, increases in loneliness, and decreases in interpersonal trust. Indices of social adaptation partially mediated the link between neuroticism and life satisfaction at the between-person but not at the within-person level. Exploratory multigroup analyses support the generalization of the cross-lagged effects of neuroticism on life satisfaction and social adaptation across age, gender, and geographical regions (East versus West Germany).

CONCLUSIONS

These findings highlight the role of neuroticism in shaping psychosocial outcomes over time.

Association between Reaction Times in the Joint Simon Task and Personality Traits

Joint go and no-go effects (joint Simon effects; JSEs) are considered to have a stimulus-response compatibility effect on joint reaction time tasks (joint Simon task) caused by the presence of other people. Additionally, JSEs are known to be associated with various social factors and are therefore a potential clinical marker for communicative function; however, the relationship with the personality that is associated with communication skills remains unclear. In this study, we focused on the association between JSE and personality traits. Thirty Japanese participants (fifteen women) were recruited. First, personality trait scores were obtained using the Japanese version of the ten-item personality inventory before the experiment. Second, we measured reaction times in the joint Simon task and single go and no-go tasks with the go signal presented on the congruent and incongruent sides. At last, we analyzed the association between reaction times and personality traits by using Spearman's correlation analysis. As a result, we observed two pairs with significant correlations: JSE and neuroticism and short reaction times in the joint condition and agreeableness. In conclusion, we identified potential psychological markers associated with the joint Simon task. These findings may lead to an additional hypothesis regarding the neurobiological mechanisms of JSEs.

Do applicants from Generation X, Y, Z differ in personality traits? data from selection procedures in aviation (1987-2019)

Introduction

The objective of this study is to research personality trait differences across generations and the impact of age, gender and self-presentation on these traits.

Methods

A total of 82,147 applicants (aged 17-24) for aviation training (pilot, air traffic controller), born between 1965 and 2002, were divided into three cohorts (Generation X, Y, Z). We analysed data from the temperament structure scales (TSS) personality questionnaire, which was collected during selection procedures between 1987 and 2019. Generational differences were analysed by ANCOVAs with generation and gender as group factors, controlled by age and self-presentation (social desirability).

Results

Age had no significant impact, but we observed slight gender differences in emotional stability, vitality, empathy, and self-presentation across all generations. The generational differences found exhibited extremely small effect sizes, suggesting that applicants have become more extraverted, controlled (with lower aggression and higher rigidity), and inclined to present themselves in a more favourable manner.

Discussion

We discuss the implications of these findings for the aviation industry and the applicability of Generation theory in personality trait research.

Comparing associations between personality and loneliness at midlife across three cultural groups

OBJECTIVE

Loneliness represents a public health threat given its central role in predicting adverse mental and physical health outcomes. Prior research has established four of the Big Five personality traits as consistent cross-sectional predictors of loneliness in largely western, White samples. However, it is not clear if the personality predictors of loneliness vary across cultures.

METHOD

The present study estimates associations between the Big Five traits and loneliness across distinct samples of White American, Black American, and Japanese adults (n = 6051 at T1). Confirmatory factor analysis and exploratory structural equation modeling were used to examine measurement invariance properties of the Big Five and loneliness across these groups. The factor structures were then carried forward to estimate associations between personality and loneliness across two assessments waves using structural equation modeling.

RESULTS

While Neuroticism was a strong predictor across groups, low Extraversion was more predictive of loneliness in Japan than in the U.S., and low Conscientiousness was only a significant predictor in the U.S.

CONCLUSIONS

Previous literature offers a framework for interpreting these findings in that loneliness may be shaped comparatively more through interconnectedness in Japanese culture, while, in the U.S., individual goals and personal romantic expectations are more salient.

A 3D framework of implicit attitude change

According to early theories, implicit (automatic) social attitudes are difficult if not impossible to change. Although this view has recently been challenged by research relying on experimental, developmental, and cultural approaches, relevant work remains siloed across research communities. As such, the time is ripe to systematize and integrate disparate (and seemingly contradictory) findings and to identify gaps in existing knowledge. To this end, we introduce a 3D framework classifying research on implicit attitude change by levels of analysis (individual vs. collective), sources of change (experimental, ontogenetic, and cultural), and timescales (short term vs. long term). This 3D framework highlights where evidence for implicit attitude change is more versus less well established and pinpoints directions for future research, including at the intersection of fields.

Trait continuity: Can parent-rated infant temperament predict HEXACO personality in early adulthood?

Examining the Raine cohort study, we tested the trait continuity hypothesis by examining the extent that young adults' (25-29 years old) self-reported HEXACO personality can be statistically predicted from multi-dimensional parental temperament ratings collected in infancy (1-2 years old). The study incorporated a lagged design (two waves), a large sample size (n = 563), and examined both temperament and personality as both dimensions and profiles. Overall, we found very limited evidence of trait continuity, with generally very weak and few statistically significant observed associations of infant temperament with early adulthood personality. Relations were weak whether profile or dimension-based operationalizations of both phenomena were adopted. Additionally, controlling for sex affected the relations of temperament and personality only to a small extent for most of the traits, and moderation effects of sex were generally zero-to-trivial in size. Altogether, parent-rated temperament in infancy seems to provide little information about HEXACO personality in early adulthood.

Awake and Sleep Bruxism Prevalence and Their Associated Psychological Factors in First-Year University Students: A Pre-Mid-Post COVID-19 Pandemic Comparison

There is a broad consensus accepting that psychological variables such as stress, anxiety, or depression play an important role in bruxism. The COVID-19 pandemic has led to an increase in stress, anxiety, and depression levels. The purpose of this study was to evaluate the impact of the COVID-19 pandemic on possible awake and sleep bruxism prevalence and on the psychological factors associated with bruxism, comparing pre-pandemic, pandemic/lockdown, and post-pandemic samples of first-year students. A total of 274 dentistry students from the Complutense University of Madrid participated in the study: 92 from 2018/2019 (pre-pandemic), 90 from 2020/2021 (pandemic), and 92 students from 2021/2022 (post-pandemic) academic years. The participants filled out a thorough battery of validated questionnaires evaluating bruxism and different psychological characteristics, such as anxiety, depression, somatization, personality, and stress coping styles. While sleep bruxism prevalence was significantly higher for the pandemic group, awake bruxism was smaller in comparison to pre-pandemic and post-pandemic groups. The post-pandemic group also presented higher levels of neuroticism and agreeableness personality traits, and positive reappraisal than the pre-pandemic group, with the pandemic group somewhere in between. Additionally, both the pandemic and post-pandemic group showed higher levels of depression and acceptance/resignation coping styles than the pre-pandemic group. Thus, among the three groups of students, the post-pandemic group was the one that showed a larger effect of the pandemic situation in their psychological variables, presenting higher levels of anxiety (state and trait), depression, acceptation/resignation coping style, higher neuroticism (emotional instability trait), and lower agreeableness trait. Nonetheless, the increase of positive reappraisal in the post-pandemic group (an adaptive coping stress style) might be also a sign of recovery. The higher sleep bruxism for the pandemic group might be related to the pandemic situation and lockdown, passively suffered, possibly promoting feelings of impotency, increased levels of depression and acceptance/resignation (normally considered a passive/maladaptive coping style), while acute stressful situations derived from daily personal social interactions might have increased anxiety levels and induced higher levels of awake bruxism observed in both the pre-pandemic and post-pandemic groups. However, further research, including larger and more representative samples, is needed to confirm this possible relationship.

Modalities of the psychedelic experience: Microclimates of set and setting in hallucinogen research and culture

Mid-20th-century American research on psychedelics evinced a stunning diversity of interpretations of hallucinogenic effects. While some researchers viewed psychedelics as invaluable tools for psychotherapy, others persisted in treating them as psychosis-inducing agents. As some groups considered psychedelics as catalysts for artistic creativity, others investigated their potential use as psychochemical weapons in the battlefield, or conversely as tools for spiritual ecstasy and revelation. This bewildering array of perceptions regarding the nature of hallucinogenic effects led to stark contrasts in the contexts (set and setting) of psychedelic research and experimentation, leading to wildly divergent outcomes and reports on the effects of the drugs, and strident disagreements between the actors in the field. Examining this remarkable historical moment of epistemological unclarity regarding psychedelics and their effects, this article describes how distinct scientific and cultural trends and moments of mid-20th-century America contributed to the creation of diverse microclimates of set and setting that reproduced investigator beliefs and attitudes and brought about a beguiling Pygmalion effect that left researchers befuddled and perplexed. I propose the concept of psychedelic modality to describe how distinct sociocultural microclimates lead to thematic aggregates in which distinct types of expectations, intentions as well as physical, social, and cultural environments all tend to cluster, producing characteristic outcomes and results. By exploring the historical context and consequences of the emergence of seven psychedelic modalities (psychotomimetic, military, psychotherapeutic, spiritual, artistic-creative, tech-innovative, and political) in mid-20th-century America, this article outlines the varieties of psychedelic experiences in their relationship with culture at large, and subcultures in particular.

Age, but not hand preference, is related to personality traits in common marmosets (Callithrix jacchus)

The proximate mechanisms underlying animal personalities, i.e. consistent inter-individual differences in behaviour, are a matter of discussion. Brain lateralization, expressed as the preferred use of the contralateral limb, has been suggested as one of these mechanisms. In this study, we measured a proxy of brain lateralization in captive common marmosets (N = 28) by testing hand preference in a simple food-reaching task and evaluated personality by coding a wide range of behaviours observed in daily situations. We explored the links between personality and both direction and strength of hand preference, as well as age and sex, using linear models. Principal component analysis revealed that the stable behavioural variables were organized in three personality dimensions: Agreeableness, Extraversion and Neuroticism. Regarding hand preference, 14 individuals were left-handed, seven were right-handed and seven were ambilateral. Contrary to our predictions, we did not find any relationship between personality scores and hand preference or sex. Instead, age was a significant predictor of personality scores, with older individuals being more agreeable and less extraverted. The link between brain lateralization and personality seems to be equivocal and dependent on personality and brain lateralization assessment methods. Further examinations of other proximate mechanisms, such as physiology or (epi)genetics, may elucidate what drives personality variation in common marmosets.

The transition to grandparenthood: No consistent evidence for change in the Big Five personality traits and life satisfaction

Intergenerational relations have received close attention in the context of population aging and increased childcare provision by grandparents. However, few studies have investigated the psychological consequences of becoming a grandparent. In a preregistered test of grandparenthood as a developmental task in middle and older adulthood, we used representative panel data from the Netherlands ( N = 563) and the United States ( N = 2210) to analyze first-time grandparents’ personality and life satisfaction development. We tested gender, employment, and grandchild care as moderators. To address confounding, we employed propensity score matching using two procedures: matching grandparents with parents and nonparents to achieve balance in different sets of carefully selected covariates. Multilevel models demonstrated mean-level stability of the Big Five personality traits and life satisfaction over the transition to grandparenthood, and no consistent moderation effects—contrary to the social investment principle. The few small effects of grandparenthood on personality development did not replicate across samples. We found no evidence of larger inter-individual differences in change in grandparents compared to the controls or of lower rank-order stability. Our findings add to recent critical re-examinations of the social investment principle and are discussed in light of characteristics that might moderate grandparents’ personality development.

A synthesized retail brand personality framework: a cross-cultural study of Taiwan and the United States

Purpose

The purpose of this study was to develop a synthesized retail brand personality scale (RBPS) framework across retail formats. This research also addresses cultural differences by applying an emic-etic approach to scale development with United States (US) and Taiwanese samples.

Design/methodology/approach

After two focus group interviews and a pretest were conducted in both Taiwan and the US, a main test was conducted on consumer samples in Taiwan (N = 412) and in the US (N = 411). Confirmatory factor analysis was used to develop a valid, reliable RBPS.

Findings

The results revealed that sincerity and sophistication are comparable dimensions to those in the brand personality scale (BPS), and unpleasantness, traditionalism, enthusiasm, antagonism and innovativeness were found to be unique dimensions for retail brands. The findings also indicated that sincerity, unpleasantness and traditionalism are common dimensions across cultures, whereas innovativeness, sophistication and antagonism are culture-specific dimensions in the US, whereas enthusiasm is a specific dimension in Taiwan.

Originality/value

To the best of authors’ knowledge, this study is the first to develop a synthesized scale of retail brand personality that compares the identified dimensions to Aaker's (1997) BPS and includes an emic-etic approach. This research contributes to the branding literature and international marketing field, and has implications for retail practitioners.

Maturation or disruption? Conscientiousness development in the transition into adolescence

Research to date has shown longitudinal changes in conscientiousness during early and middle adolescence, but most studies have been conducted in Western countries. The present study aimed to examine the pattern of mean-level conscientiousness change at the transition into early adolescence among a Chinese sample using curve of factors (CUFFS) models. Four waves of data from 661 Chinese children aged 8 years old at baseline in the China Family Panel Studies were used. Parents were asked to rate their children’s level of conscientiousness every 2 years. On average, mean-level conscientiousness showed a decelerating increase. Girls had higher average conscientiousness levels than boys, but they did not differ in change patterns. The inconsistency between the current study and previous research indicates that conscientiousness development may depend, in part, on cultural factors.

Income moderates changes in big-five personality traits across eighteen years

The role of income in adult personality change remains poorly understood. Using latent growth modeling, we performed exploratory analyses of how longitudinal trajectories of change in personal income and the Big Five personality traits would be related. We examined 4234 participants (2149 Males, 2085 Females; MT1age = 46.42, SDT1age = 13.36, age range at T1: 20–74 years) across three time points spanning 18 years using data from the Midlife in the United States study. Results indicated that starting levels of income moderated changes in four personality traits. Specifically, income moderated the slopes of openness to experience, extraversion, agreeableness, and neuroticism, such that for high-income individuals, openness to experience, extraversion, and agreeableness were less likely to decline and more likely to either increase or remain stable over time, while neuroticism was less likely to increase and more likely to remain stable over time. Conversely, personality traits were weaker predictors of income change as slopes of income were not moderated by starting levels of any of the personality traits. Moreover, changes in income were not correlated with changes in any of the personality traits. The findings suggest that individual differences in income could potentially explain diverging trajectories of personality change.

Acting Like a Baby Boomer? Birth-Cohort Differences in Adults' Personality Trajectories During the Last Half a Century

Society and developmental theory generally assume that there are wide generational differences in personality. Yet evidence showing historical change in the levels of adult Big Five traits is scarce and particularly so for developmental change. We tracked adult trajectories of personality in 4,732 participants (age: M = 52.93 years, SD = 16.69; 53% female) from the Seattle Longitudinal Study (born 1883-1976) across 50 years. Multilevel models revealed evidence for historical change in personality: At age 56, later-born cohorts exhibited lower levels of maturity-related traits (agreeableness and neuroticism) and higher levels of agency-related traits (extraversion and openness) than earlier-born cohorts. Historical changes in agreeableness and neuroticism were more pronounced among young adults, but changes in openness were less pronounced. Cohort differences in change were rare and were observed only for agreeableness; within-person increases were more pronounced among later-born cohorts. Our results yield the first evidence for historical change in the Big Five across adulthood and point to the roles of delayed social-investment and maturity effects.

Stability and change in the Big Five personality traits: Findings from a longitudinal study of Mexican-origin adults

A large body of research has documented how personality develops across adulthood, yet very little longitudinal work has examined whether these findings generalize beyond predominantly middle-class, highly educated White American or Western European individuals. This preregistered study uses longitudinal data from 1,110 Mexican-origin adults who completed a well-validated personality measure, the Big Five Inventory, up to six times across 12 years. Individuals generally maintained their rank ordering on the Big Five over time (rs = .66-.80), and the relative ordering of the Big Five within persons was also highly stable (rs = .58-.66). All of the Big Five traits showed small, linear mean-level decreases across adulthood. These trajectories showed few associations with sociodemographic factors (sex, education level, and IQ) and cultural factors (generational status, age at immigration, Spanish/English language preference, Mexican cultural values, American cultural values, and ethnic discrimination). The statistically significant findings we did observe mostly concerned associations between cultural values and Extraversion, Agreeableness, and Openness. Acquiescence bias was also positively associated with Big Five personality trait scores at every wave. There was no evidence of mean-level change in the Big Five when including time-varying acquiescence scores as covariates in the models. Divergences between the present findings and previous research highlight the need to study personality development with diverse aging samples. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Cortico-striatal-thalamic loop as a neural correlate of neuroticism in the mind-body interface

OBJECTIVE

Although brain structural studies have demonstrated the neural correlates of neuroticism, the outcomes are not easily identified because of the various possible brain regions involved, low statistical power (low number of subjects), and brain structural measures available, such as mean diffusivity (MD), which are more suitable than standard regional measures of grey and white-matter volume (rGMV, rWMV) and fractional anisotropy (FA). We hypothesized that neuroticism neural correlates could be detected by MD and differentially identified using other measures. We aimed to visualize the neural correlates of neuroticism.

METHODS

A voxel-by-voxel regression analysis was performed using the MD, rGMV, rWMV, or FA value as the dependent variable and with neuroticism scores based on the NEO-FFI and its confounding factors as independent variables in 1207 (693 men and 514 women; age, 20.7 ± 1.8, 18-27 years), non-clinical students in a cross-sectional study.

RESULTS

MD in the cortico- (orbitofrontal cortex, anterior cingulate cortex, and posterior insula) striatal- (caudate and putamen) thalamic loop regions, including the right posterior limb of the internal capsule, were positively associated with neuroticism using the threshold-free cluster enhancement method with a family-wise error-corrected threshold of P < 0.0125 (0.05/4, Bonferroni correction for four types of MRI data [MD, rGMV, rWMV, and FA]) at the whole-brain level.

CONCLUSIONS

An increased MD has generally been associated with reduced neural tissues and possibly area function. Accordingly, this finding helps elucidate the mechanism of somatization in neuroticism because the regions related to neuroticism are considered neural correlates of somatoform disorders.

Open-Source Personality Trait Norms for the United Kingdom and Ireland

Abstract. Most copyrighted personality inventories facilitate norm-referencing through illustrative tables, yet their application to the many fields relevant to personality measurement is constrained by the need for stakeholders to possess the requisite financial resources to access them. Using an IPIP-NEO-300 dataset from Johnson’s IPIP-NEO data repository, we created open-source norm tables for different age groups (14–17 years; 18–25 years; and 30+ years) within a combined standardization sample from the United Kingdom (UK) and Ireland ( N = 18,591). The newly created tables are freely available online ( https://osf.io/tbmh5 ), and there is no need to ask for permission to modify them. We provide general instructions that can be used to create open-source personality trait norms for other countries, settings, and age groups, as well as gender-specific norms. There is great potential for these norms to be used in various settings and their open-source freedoms may encourage future collaborations and investigations.

Cultural Differences in Susceptibility to the End of History Illusion

The End of History Illusion (EoHI) is the tendency to report that a greater amount of change occurred in the past than is predicted to occur in the future. We investigated if cultural differences exist in the magnitude of the EoHI for self-reported life satisfaction and personality traits. We found an effect of culture such that the difference between reported past and predicted future change was greater for U.S. Americans than Japanese, and that individual differences in two aspects of the self (self-esteem and self-concept clarity) mediated the link between culture and the magnitude of the EoHI. We also found a robust cultural difference in perceptions of past change; U.S. Americans tended to think about the past more negatively than their Japanese counterparts. These findings yield new insight onto the link between cultural context and the way people remember the past and imagine the future.

Association between conscientiousness and peritoneal dialysis-related peritonitis

AIM

Peritonitis is a critical complication in patients undergoing peritoneal dialysis. Patient characteristics, especially conscientiousness, potentially influence self-care activity. This study aimed to examine the relationship between the peritonitis risk and the patient conscientiousness.

METHODS

This retrospective observational study was conducted at three Japanese medical centres in 2018. Adult patients undergoing peritoneal dialysis were evaluated for conscientiousness with the Japanese version of the Ten-Item Personality Inventory. We followed the patients from peritoneal dialysis induction retrospectively on chart review. The primary outcome was time to first episode of peritonitis after initiation of peritoneal dialysis in the entire observation period. Hazard ratios were estimated using a Cox model adjusted for potential confounders.

RESULTS

Among 111 patients enrolled, 32 experienced peritonitis. The patients were divided into the more conscientious group (n = 64) and less conscientious group (n = 47) based on a mean conscientiousness score of 3.991. Additionally, less conscientious patients tended to be at higher risk for peritonitis during the entire study period (hazard ratio adjusted for age and sex, 1.99; 95% confidence interval, 0.98-4.03; p = .057). The increased risk in the less conscientious group was statistically significant in the first year (adjusted hazard ratio, 6.98; 95% confidence interval, 1.42-34.40; p = .017).

CONCLUSION

Less conscientious patients significantly have shorter peritonitis-free survival in the early phase after peritoneal dialysis induction although not significantly during the entire study period. Personality trait assessment using the Ten-Item Personality Inventory could be helpful in educating and following up patients undergoing peritoneal dialysis.

Correlated personality change across time and age

The goal of this study was to examine differential and correlated change in personality across the adult lifespan. Studying differential and correlated change can help understand whether intraindividual trait change trajectories deviate from the norm and how these trajectories are coupled with each other. We used data from two large longitudinal panel studies from the United States that covered a total age range of 20 to 95 years on the first measurement occasion. We used correlated factor models and bivariate latent change score models to examine the rank-order stability and correlations between change across three measurement waves covering 18 years ( N = 3250) and four measurement waves covering 12 years ( N = 4145). We examined the moderation effects of continuous age on these model parameters using local structural equation modeling. The results suggest that the test–retest correlations decrease with increasing time between measurements but are unaffected by participants’ age. We found that change processes in Extraversion, Openness, Agreeableness, and Conscientiousness were strongly related, particularly in late adulthood. Correlated change patterns were highly stable across time intervals and similar to the initial cross-sectional Big Five correlations. We discuss potential mechanisms and implications for personality development research.

Unpredictable Changes: Different Effects of Derailment on Well-Being Between North American and East Asian Samples

Some individuals experience the feeling that they have become a person they had not anticipated. The life path they had expected to take is not consonant with the one they are taking in reality. This perception of "off-course" in identity and self-direction is referred to as derailment. Although previous studies have postulated and demonstrated that derailment causes a low level of well-being, no studies have examined its existence and effect across cultures. We hypothesized that East Asians (Japanese) are less vulnerable to feeling derailed than North Americans (Canadians/Americans), and that those Japanese who feel derailed do not necessarily experience long-term damage to their well-being. Two correlational studies and one longitudinal study with a one-year interval supported these hypotheses and also demonstrated metric invariance of the Derailment Scale between countries. We discuss that these findings may be explained by East Asian's dialectical thinking, in which the perception of one's life direction is flexible.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at (10.1007/s10902-021-00375-4).

A scoping review protocol to map the evidence on self-reported health and neuroticism in older adults

OBJECTIVE: To identify the evidence on self-reported health and neuroticism in older adults. METHODS: Indexed literature published in English, Spanish and Portuguese will be systematically searched and retrieved from 10 databases; reference lists from included studies will be manually searched. Two authors will independently screen titles, abstracts, and full texts against the eligibility criteria. A customized data extraction form will be used to perform data extraction of the included studies, which will be: studies written in English, Portuguese, and Spanish; studies of older adults aged 55 years or over (mean age is 60 years at least); studies of community-dwelling older adults; studies that evaluated both self-reported health and personality; studies that evaluated self-reported health and personality with validated instruments; observational, review, and intervention studies. RESULTS: The results will be presented in a tabular format, accompanied by a narrative summary.

Relationship Between Basic Human Values and Decision-Making Styles in Adolescents

This paper examines the relationship between decision-making styles and values of Spanish adolescents and analyses the role of age and gender on their use of adaptive and maladaptive decision-making styles. The scientific literature suggests that decision-making consists of different stages through which individuals reach a solution to their dilemmas. An ex post facto quantitative, non-experimental research design was used and applied to a sample of adolescents of Madrid (España). The Flinders Adolescents Decision-Making Questionnaire (FADMQ) by Mann as well as the Schwartz Values Scale (SVS) were also used. Correlation analysis was used to analyze the decision-making styles and values of adolescents using the variables gender and age to classify the sample. The study concludes that adolescents who use an adaptive decision-making style tend to pursue mastery of the values Self-direction, Stimulation, Achievement, and Power, whereas adolescents who use a maladaptive style tend to shy away from the value Self-direction and are more conservative. In terms of gender, the results for both females and males coincide in the significant correlations found between their decision-making styles and values. In terms of age, the correlations between values and decision-making styles are higher and numerous in younger adolescents. We conclude that the relationships verified could help educators to engage and act on the development of specific decision-making training programs based on the values of adolescents.

Changes in optimism and pessimism in response to life events: Evidence from three large panel studies

Although individuals vary in how optimistic they are about the future, one assumption that researchers make is that optimism is sensitive to changes in life events and circumstances. We examined how optimism and pessimism changed across the lifespan and in response to life events in three large panel studies (combined N = 74,886). In the American and Dutch samples, we found that optimism increased across younger adulthood, plateaued in midlife, and then decreased in older adulthood. In the German sample, there were inconsistent results with respect to age differences and mean level changes in optimism. Associations between life events and changes in optimism/pessimism were inconsistent across samples. We discuss our results in the context of life events and lifespan development.

Is Healthy Neuroticism Associated with Chronic Conditions? A Coordinated Integrative Data Analysis

Early investigations of the neuroticism by conscientiousness interaction with regards to health have been promising, but to date, there have been no systematic investigations of this interaction that account for the various personality measurement instruments, varying populations, or aspects of health. The current study - the second of three - uses a coordinated analysis approach to test the impact of the neuroticism by conscientiousness interaction on the prevalence and incidence of chronic conditions. Using 15 pre-existing longitudinal studies (N > 49,375), we found that conscientiousness did not moderate the relationship between neuroticism and having hypertension (OR = 1.00,95%CI[0.98,1.02]), diabetes (OR = 1.02[0.99,1.04]), or heart disease (OR = 0.99[0.97,1.01]). Similarly, we found that conscientiousness did not moderate the prospective relationship between neuroticism and onset of hypertension (OR = 0.98,[0.95,1.01]), diabetes (OR = 0.99[0.94,1.05]), or heart disease (OR = 0.98[0.94,1.03]). Heterogeneity of effect sizes was largely nonsignificant, with one exception, indicating that the effects are consistent between datasets. Overall, we conclude that there is no evidence that healthy neuroticism, operationalized as the conscientiousness by neuroticism interaction, buffers against chronic conditions.

A Cultural Comparison of Personality Profiles of U.S. and Japanese Centenarians

The purpose of this study was a cross-cultural examination of centenarians' personality through a person-centered approach to examine if there is a "resilient" personality profile consistent across cultures. Proxy reports information was obtained from family and close friends of 239 U.S. centenarians from the Georgia Centenarians Study and 272 Japanese centenarians from the Tokyo Centenarian Study. Latent profile analyses were conducted to identify personality profiles in centenarians from the United States and Japan. Two personality profiles were identified in both samples: a "resilient" personality profile and "nonresilient" personality profile. The "resilient" group had higher levels of positive personality traits with higher scores on agreeableness and extraversion and lower scores on neuroticism, conscientiousness, and openness. The "nonresilient" group had higher scores on neuroticism and lower scores on extraversion, openness, agreeableness, and conscientiousness. Fifty percent of U.S. centenarians and 65% of Japanese centenarians were in the "resilient" group.

Culture and well-being in late adulthood: Theory and evidence

Aging happens to everyone everywhere. At present, however, little is known about whether life-span adult development-and particularly development in late adulthood-is pancultural or culture-bound. Here, we propose that in Western cultural contexts, individuals are encouraged to maintain the active, positive, and independent self. This cultural expectation continues even in late adulthood, thus leading to a mismatch between aspirations to live up to the cultural expectation and the reality of aging. This mismatch is potentially alienating. In contrast, in Asian cultural contexts, a critical task throughout life is to achieve attunement with age-graded social roles. This ideal may be more attainable even in late adulthood. Our review of existent evidence lends support to this analysis. Specifically, in late adulthood, Americans showed a robust psychological bias toward high-arousal positive (vs. negative) emotions. This positivity, however, concealed a somber aspect of aging that manifested itself in more demanding realms of life. Thus, Americans in late adulthood also showed marked declines in certain desirable personality traits (e.g., extraversion and conscientiousness) and some aspects of the meaning in life (e.g., personal growth and purpose in life). None of these effects were apparent among East Asians. The current work underscores a need to extend research on life-span development beyond Western populations. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Culture Is Associated With the Experience of Long-Term Self-Concept Changes

Cultural context can affect how changes in self-concepts are either valued or tolerated. However, very little is currently known regarding how culture may differentially confer consequences to people that change their self-concepts over the course of several years. We investigated the moderating role of culture (Japan and USA) on the link between long-term (∼4 years) self-concept changes and a comprehensive set of well-being measures (hedonic, eudaimonic, and family based). We found that American’s self-concept instability was more negatively associated with one’s well-being and emotional support within one’s family than Japanese. Furthermore, Americans were particularly negatively impacted when they became less agentic and conscientious over time. One possible interpretation is that Western, individualistic cultures may discourage people from changing their identities throughout their adult life. Although American culture often espouses the sanctity of freedom, American culture may also limit people’s freedom to change how they see themselves over time.

Differences in Eysenck's Personality Dimensions between a Group of Breast Cancer Survivors and the General Population

Cancer may influence personality in patients and survivors. However, the possible relations between the treatments that the patients have undergone and the personality in survivors are not clear. This study aimed to establish the differences in personality between a group of breast cancer survivors and a control group, and to test the predictive utility of the treatments on the personality traits in survivors. Thirty breast cancer survivors and thirty participants from the general population completed the Eysenck personality questionnaire-revised (EPQ-R) and a socio-demographic questionnaire. Survivors had lower scores on extraversion and higher scores on neuroticism than the control group, but these differences were not significant. However, differences in psychoticism were significant, with higher scores in the survivor group. Breast-conserving therapy predicted extraversion while breast reconstruction predicted psychoticism. These results suggest that the physical consequences of surgery may lead to social and psychological impairments in this group of patients.

Personality Across the Life Span

Trait stability and maturation are fundamental principles of contemporary personality psychology and have been shown to hold across many cultures. However, it has proven difficult to move beyond these general findings to a detailed account of trait development. There are pervasive and unexplained inconsistencies across studies that may be due to ( a) insufficient attention to measurement error, ( b) subtle but age-sensitive differences in alternative measures of the same trait, or ( c) different perspectives reflected in self-reports and observer ratings. Multiscale, multimethod-and ideally multinational-studies are needed. Several hypotheses have been proposed to account for trait stability and change, but supporting evidence is currently weak or indirect; trait development is a fertile if sometimes frustrating field for theory and research. Beyond traits, there are approaches to personality development that are of interest to students of adult development, and these may be fruitfully addressed from a trait perspective.