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Personality changes across the lifespan, but strong evidence regarding the mechanisms responsible for personality change remains elusive. Studies of personality change and life events, for example, suggest that personality is difficult to change. But there are two key issues with assessing personality change. First, most change models optimize population-level, not individual-level, effects, which ignores heterogeneity in patterns of change. Second, optimizing change as mean-levels of self-reports fails to incorporate methods for assessing personality dynamics, such as using changes in variances of and correlations in multivariate time series data that often proceed changes in mean-levels, making variance change detection a promising technique for the study of change. Using a sample of N = 388 participants (total N = 21,790) assessed weekly over 60 weeks, we test a permutation-based approach for detecting individual-level personality changes in multivariate time series and compare the results to event-based methods for assessing change. We find that a non-trivial number of participants show change over the course of the year but that there was little association between these change points and life events they experienced. We conclude by highlighting the importance in idiographic and dynamic investigations of change.

Decades of studies identify personality traits as prospectively associated with life outcomes. However, previous investigations of personality characteristic-outcome associations have not taken a principled approach to covariate use or other sampling strategies to ensure the robustness of personality-outcome associations. The result is that it is unclear (a) whether personality characteristics are associated with important outcomes after accounting for a range of background variables, (b) for whom and when personality-outcome associations hold, and (c) that background variables are most important to account for. The present study examines the robustness and boundary conditions of personality-outcome associations using prospective Big Five associations with 14 health, social, education/work, and societal outcomes across eight different person- and study-level moderators using individual participant data from 171,395 individuals across 10 longitudinal panel studies in a mega-analytic framework. Robustness and boundary conditions were systematically tested using two approaches: propensity score matching and specification curve analysis. Three findings emerged: First, personality characteristics remain robustly associated with later life outcomes. Second, the effects generalize, as there are few moderators of personality-outcome associations. Third, robustness was differential across covariate choice in nearly half of the tested models, with the inclusion or exclusion of some of these flipping the direction of association. In summary, personality characteristics are robustly associated with later life outcomes with few moderated associations. However, researchers still need to be careful in their choices of covariates. We discuss how these findings can inform studies of personality-outcome associations, as well as recommendations for covariate inclusion. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

ObjectivesResearch has demonstrated sense of purpose predicts better health in older adulthood. However, work is limited with respect to understanding how experiencing a health event or illness diagnosis impacts older adults' sense of purpose.MethodThe current study employed a propensity score matching approach to compare older adults who did or did not experience an adverse health event on changes in sense of purpose across 3 waves of the Health and Retirement Study. Sense of purpose was assessed at each wave, and changes were compared between people who did versus did not experience one of 7 diagnoses and health events.ResultsWhen propensity score matching was employed, no differences in trajectories of change for sense of purpose were found with respect to all 7 events. Individual differences in trajectories, however, were evidenced across groups.DiscussionThe current findings suggest that even when health events impact older adults' physical functioning or place limitations on their activity, they may hold little ramifications for their sense of purpose. Future research should consider this potential for resilience, focusing on how adults compensate for losses.

Within-person variation in cognitive performance is linked to pathological aging. Cognitive fluctuations have not been analyzed using cognitive process models, such as the diffusion model, to characterize which cognitive processes contribute to variability in cognition. We collected 21 daily assessments of attention and personality in younger adults, healthy older adults, and those with mild cognitive impairment. We employed mixed-effects location scale models to analyze group differences on mean diffusion parameters and daily variability. Discussion focuses on how these methods extend our understanding of how cognitive deficits might appear in aging and disease and the moderating influence of daily personality. [ABSTRACT FROM AUTHOR]

Personality traits are well-known predictors of academic success across all levels of education. However, whether school provides an environment to cultivate and promote personality traits is largely unknown. Theories about personality development give reasons to assume that enduring experiences at school could lead to prolonged personality changes. We therefore studied the dynamic interplay of impulse control--an important predictor for educational and life outcomes--and perceptions of school-related experiences both in terms of selection and socialization effects. We used a large, representative, longitudinal dataset of the National Longitudinal Survey of Youth following students from ages 10 to 21 across 6 assessment waves to examine mutual associations of impulse control and school-related experiences across middle and high school years. Sample sizes for the analyses ranged from 8,204 to 8,421 (51% male). Mutual associations between perceived school-related experiences and impulse control were analyzed using random intercept cross-lagged panel models. Results supported the appearance of selection and, to a lesser extent, socialization effects for impulse control and some school-related experiences. The results point to the importance of school-related experiences not limited to academic matters.

Increased variability in cognitive scores, mood or personality traits can be indicative of underlying neurological disorders. Whether variability in cognition is due to changes in mood or personality is unknown. A total of 66 younger adults, 51 healthy older adults and 38 participants with cognitive impairment completed 21 daily sessions of attention, working memory, mood, and personality assessment. Group differences in mean performance and variability were examined using Bayesian mixed effects location scale models. Variability in attention decreased from younger to older adults and then increased again in cognitive impairment. Younger adults were more variable in agreeableness, openness and conscientiousness compared to older adults. The clinically impaired group differed from the healthy older adults in terms of variability on attention, openness, and conscientiousness. Healthy aging results in greater stability in personality traits over short intervals yet this stability is not redundant with increased stability in cognitive scores. [ABSTRACT FROM AUTHOR]

The current study examined whether relationships also influence personality trait development during middle and older adulthood, focusing on the individual's perception of support from the relationship partner. Using data from the Health and Retirement Study (n = 20,422; mean age = 65.9 years), we examined the longitudinal relationships between Big Five personality trait levels and perceived support from children, family, friends, and spouses. Results found that participants who reported more positive social support and lower negative support also tended to score higher on conscientiousness, extraversion, agreeableness, and openness to experience, but lower on neuroticism. Moreover, changes in positive support across relationship partners coincided with trait changes over time, in the form of more positive support was associated with seemingly adaptive changes on the Big Five. Findings are discussed with respect to identifying social influences on personality development in adulthood.

A parent has immense control over the experiences of their offspring. Given that personality is associated with important life outcomes—mediated through decision‐making processes—it is likely that parental personality impacts their child's life outcomes. While "compensatory" influences from another person have been identified in romantic partners, the impact of parent's personality on their child's outcomes has not been thoroughly examined. Using a response surface analysis approach, we will look at the associations of adolescent personality with the personality of their parents for the prediction of adolescent outcomes (Ndyads = 9395). Parent personality predicted outcomes for their child above and beyond their child's traits. There were few instances of child–parent personality interactions, suggesting the mechanisms linking child and parent traits to child outcomes are largely independent. Findings suggest parents' personalities offer a unique influence on the outcomes for children while they develop and navigate through adolescence. Highlights: This paper investigated if parental Big Five personality traits predicted outcomes for their child in adolescence, above and beyond the child's own traits.Response surface analyses indicated that parent personality does predict outcomes for their adolescent child, with few interaction or similarity effects emerging.These findings suggest the Big Five traits of parents are impactful in the child and parent relationship and can uniquely influence outcomes for the child above and beyond their own traits. [ABSTRACT FROM AUTHOR]

Objective: Few environments reliably influence mean‐level and rank‐order changes in personality—perhaps because personality development needs to be examined through an individualized, person‐centered lens. Methods: The current study used Bayesian multilevel linear models to examine the association between 16 life events and changes in person‐centered, Big Five personality consistency across 4 to 10 waves of data using four datasets (N = 24,491). Results: Selection effects were found for events such as marriage, (un)employment, retirement, and volunteering, whereas between‐person effects for slopes were found for events such as beginning formal education, employment, and retirement. Within‐person changes were often small and emerged inconsistently across datasets but, when present, were brief and negative in direction, suggesting life events can serve as a short‐term disruption to the personality system. However, there were many individual differences around event‐related trajectories. Conclusion: Our results highlight that the effects of life events depend on how personality and its changes are quantified—with these findings underscoring the utility of a person‐centered approach as it can capture the full range of these idiosyncrasies. Overall, these findings suggest that life events are associated with a range of idiosyncratic effects and can serve as a short‐term, destabilizing shock to one's personality system. [ABSTRACT FROM AUTHOR]

Pre-diagnostic deficits in social motivation are hypothesized to contribute to autism spectrum disorder (ASD), a heritable neurodevelopmental condition. We evaluated psychometric properties of a social motivation index (SMI) using parent-report item-level data from 597 participants in a prospective cohort of infant siblings at high and low familial risk for ASD. We tested whether lower SMI scores at 6, 12, and 24 months were associated with a 24-month ASD diagnosis and whether social motivation's course differed relative to familial ASD liability. The SMI displayed good internal consistency and temporal stability. Children diagnosed with ASD displayed lower mean SMI T-scores at all ages and a decrease in mean T-scores across age. Lower group-level 6-month scores corresponded with higher familial ASD liability. Among high-risk infants, strong decline in SMI T-scores was associated with 10-fold odds of diagnosis. Infant social motivation is quantifiable by parental report, differentiates children with versus without later ASD by age 6 months, and tracks with familial ASD liability, consistent with a diagnostic and susceptibility marker of ASD. Early decrements and decline in social motivation indicate increased likelihood of ASD, highlighting social motivation's importance to risk assessment and clarification of the ontogeny of ASD. [ABSTRACT FROM AUTHOR]

Maladaptive responses to peer acceptance and rejection arise in numerous psychiatric disorders in adolescence; yet, homogeneity and heterogeneity across disorders suggest common and unique mechanisms of impaired social function. We tested the hypothesis that social feedback is processed similarly to other forms of feedback (e.g., monetary) by examining the correspondence between the brain's response to social acceptance and rejection and behavioral performance on a separate reward and loss task. We also examined the relationship between these brain responses and depression and social anxiety severity. The sample consisted of one hundred and thirteen 16–21‐year olds who received virtual peer acceptance/rejection feedback in an event‐related potential (ERP) task. We used temporospatial principal component analysis and identified a component consistent with the reward positivity (RewP) or feedback negativity (FN). RewP to social acceptance was not significantly related to reward bias or the FN to social rejection related to loss avoidance. The relationship between RewP and depression severity, while nonsignificant, was of a similar magnitude to prior studies. Exploratory analyses yielded a significant relationship between lower socioeconomic status (SES) and blunted RewP and between lower SES and heightened loss avoidance and blunted reward bias. These findings build on prior work to improve our understanding of the function of the brain's response to social feedback, while also suggesting a pathway for further study, whereby poverty leads to depression via social and reward learning mechanisms. The current study identifies yet unexplored links between socioeconomic status, brain responses to social acceptance, and reward learning. This study also provides rigorous, multimethod tests of preregistered hypotheses on the relationship between social feedback processing and behavioral reward and loss system function. These findings have the potential to inform a neural and behavioral pathway through which low socioeconomic status confers risk for depression. [ABSTRACT FROM AUTHOR]