Do Happy American and Japanese Adults Become Similar in Psychological Ttraits as They Age?

As happiness has been a popular topic, philosophers and researchers as well as lay people have continued to discuss it. The potential factors which lead to happiness may be influenced by culture and age. Referring to previous findings on distinctive characteristics between Western and Eastern cultures and age effects on psychological traits and well-being, the present study examined potential similarities and differences among age groups of American and Japanese adults with different levels of happiness. The age groups studied consisted of those aged 35-49, 50-64, and 65-79. It was hypothesized that psychological traits including independence, interdependence, extraversión, and neuroticism become more similar between American and Japanese adults as they age and this tendency is stronger for happy adults. The results for all these traits failed to support the hypothesis. Although significant main effects were found in happiness level for all the traits and in nationality for all the traits except neuroticism. no common trends of age-related effects and interactions were observed among the four traits. While this study could provide practical implications, it included several limitations. Future research should retest the hypothesis with more refined methodologies

Longitudinal and Age-Related Implications of Primary and Secondary Control for Hedonic and Eudaimonic Well-Being

The longitudinal associations of primary and secondary control with two distinct aspects of happiness including hedonic/subjective and eudaimonic/psychological well-being had not been fully studied. The present study aimed to contribute to the literature by examining these associations and their age differences. Using data from the second and third waves of the Midlife in the United States (MIDUS; N = 4963, aged 28 to 84 at baseline), the present study conducted structural equation modeling analyses to examine whether one primary control strategy (persistence in goal striving) and two secondary control strategies (positive reappraisals and lowering aspirations) predicted residualized changes in the latent constructs of subjective well-being (SWB) and psychological well-being (PWB) and whether there were age differences in these associations. The results indicate that persistence in goal striving and lowering aspirations overall predicted changes in PWB while none of the control strategies did for SWB, but some age differences were found. Whereas these differences somewhat varied for the outcomes of SWB and PWB, the findings indicate tendencies for older individuals compared to younger individuals of more negative (or less positive) associations of persistence in goal striving and more positive (or less negative) and more negative associations of positive reappraisals and lowering aspirations, respectively, with these outcomes. The present study suggested potential directions of future research aimed at further examining the role of primary and secondary control for happiness and exploring potential interventions to promote happiness, for example, by modifying primary and/or secondary control for adults of different ages

Personality and media multitasking in the college classroom: Context-dependent implications of conscientiousness and agreeableness

Both personality and contexts may account for media multitasking in the college classroom. As this area of research was lacking, the present study examined which personality traits would be associated with in-class media multitasking in different contexts of text messaging. Undergraduate students (83 males and 65 females; average age: 20.0 [SD = 4.3]) completed a questionnaire on demographic characteristics, general text-messaging behavior, and Big Five personality traits as well as a delay-discounting task. This task had two hypothetical scenarios in which participants received either an urgent text message from their significant other (Significant Other condition) or a non-urgent message from a casual friend (Casual Friend condition), and they rated their likelihood of immediately replying to the message during the class versus waiting to reply until the class was over. For each of the conditions, hierarchical regression analyses were conducted to examine whether personality traits predicted the likelihood of waiting, after controlling for demographic characteristics and general text-messaging behavior. Whereas only conscientiousness independently predicted the likelihood of waiting in the Significant Other condition (β = .20, p = .033), only agreeableness independently predicted the likelihood in the Casual Friend condition (β = .27, p = .002). These findings contribute to the sparse literature on links of personality traits and in-class media multitasking by highlighting the possible context-dependent aspects of these links. The findings also indicate potential directions of future research including exploring approaches to reducing media multitasking in the college classroom while taking both personality and specific contexts into consideration

Longitudinal Associations of Perceived Mastery and Constraints With Coping and Their Implications for Functional Health for Aging Adults

The present study examined longitudinal associations of distinct dimensions of perceived control (i.e., perceived mastery and constraints) with approach and avoidance coping relating to functional health for aging adults, which had not been well studied previously. Using data from two waves of Midlife in the United States (N = 4,963, whose mean age was 55.4 [SD = 12.5]), a longitudinal path model was analyzed for direct and indirect effects among perceived mastery and constraints, approach and avoidance coping, and functional limitations. Bidirectional associations were observed between perceived mastery and approach coping and between perceived constraints and avoidance coping. Moreover, perceived constraints not only were directly associated with functional limitations but also mediated the longitudinal associations of the other factors of interest with functional limitations. These findings can inform future research on perceived control and coping in the context of promoting functional health

Longitudinal Implications of Social Integration for Age and Gender Differences in Late-Life Physical Functioning

Social integration has documented benefits for late-life health; yet, little is known about its impacts on trajectories of physical functioning. This study examines age and gender differences in the longitudinal associations between social integration and activities of daily living (ADLs) using a hierarchical linear model with three waves of survey data collected over 4 years from the Social Integration and Aging Study (N = 400; baseline mean age = 80.3). Findings indicated some interaction effects of age, gender, and/or social integration on ADL trajectories. Among those of more advanced age, women showed greater increases in ADL limitations than men, and individuals with lower social integration experienced greater increases in ADL limitations than those with higher social integration. Neither of these patterns were found among younger older adults. This study highlights the benefits of longitudinal research on social integration and the need to explore practical interventions for promoting social integration particularly among the oldest older adults

Psychosocial factors promoting personal growth throughout adulthood

Personal growth is essential in the lives of adults of any age and is associated with a variety of well-being outcomes. Building on previous research on psychosocial factors associated with personal growth, the present study aimed to investigate whether and how psychosocial factors (including working, generativity, positive interpersonal relationships, and spirituality) could affect aging adults’ personal growth longitudinally. Using three waves of Midlife in the United States data from adults with baseline ages of 20–75, two-level hierarchical linear modeling analyses were conducted to examine the effects of psychosocial factors as well as age and gender on levels and trajectories of personal growth over the span of nearly two decades. All the factors predicted levels of personal growth while positive relationships and generativity had larger effects relative to the others. In addition, some of the effects were moderated by baseline age or passage of time (i.e., aging). Particularly, the moderated effects involving positive relations were multifaceted. Among those with less positive relationships, older people’s levels of personal growth remained lower than younger people over time. However, among those with more positive relationships, older people reported lower growth initially but the age difference was no longer confirmed two decades later. In other words, having positive relationships appeared to become increasingly important for aging adults to maintain higher personal growth. These findings suggest shifts in life priorities that could influence personal growth among aging adults, and the implications can be informative for future research and practice

Longitudinal Associations of Conscientiousness and Neuroticism With Perceived Mastery and Constraints for Aging Adults

It has not been well understood how conscientiousness and neuroticism are associated with two related but distinct dimensions of perceived control (i.e., perceived mastery and constraints) among aging adults. The present study examined these associations and their change over time, while addressing whether they differ by age or gender. For respondents aged 50+ at baseline (N = 2,768) in the Midlife in the United States (MIDUS) study, multilevel modeling analyses were conducted to assess how conscientiousness and neuroticism predicted perceived mastery and constraints over 2 decades. As expected, higher conscientiousness and lower neuroticism (for both between- and within-person variability) predicted higher perceived mastery and lower perceived constraints overall. Nuanced findings emerged related to age, gender and change over time for different associations of conscientiousness and neuroticism with the outcomes. These findings can inform future research suggesting directions of further investigations for these complex associations

Comprehensive Analysis of Risk Factors for Periodontitis Focusing on the Saliva Microbiome and Polymorphism

Few studies have exhaustively assessed relationships among polymorphisms, the microbiome, and periodontitis. The objective of the present study was to assess associations simultaneously among polymorphisms, the microbiome, and periodontitis. We used propensity score matching with a 1:1 ratio to select subjects, and then 22 individuals (mean age +/- standard deviation, 60.7 +/- 9.9 years) were analyzed. After saliva collection, V3-4 regions of the 16S rRNA gene were sequenced to investigate microbiome composition, alpha diversity (Shannon index, Simpson index, Chao1, and abundance-based coverage estimator) and beta diversity using principal coordinate analysis (PCoA) based on weighted and unweighted UniFrac distances. A total of 51 single-nucleotide polymorphisms (SNPs) related to periodontitis were identified. The frequencies of SNPs were collected from Genome-Wide Association Study data. The PCoA of unweighted UniFrac distance showed a significant difference between periodontitis and control groups (p 0.05). Two families (Lactobacillaceae and Desulfobulbaceae) and one species (Porphyromonas gingivalis) were observed only in the periodontitis group. No SNPs showed significant expression. These results suggest that periodontitis was related to the presence of P. gingivalis and the families Lactobacillaceae and Desulfobulbaceae but not SNPs