Paradoxical gender effects in meat consumption across cultures.

Men tend to eat more meat than women, but it is not clear why. We tested three hypotheses in a cross-cultural design (20,802 individuals in 23 countries across four continents): that gender differences are (a) universal, (b) related to gender roles and thus weaker in countries with higher gender equality and human development, or (c) related to opportunities to express gender roles and thus stronger in countries with higher gender equality and human development. Across all countries, men tended to consume more meat than women. However, this difference increased significantly in countries with greater human development and gender equality. The paradoxical gender gap in meat consumption aligns with previous research that suggests greater differences in behavior across genders in contexts that are more developed and gender equal. We discuss implications for theories of culture and gender as well as practical implications for global meat reduction.

Personality Traits and Insurance Demand.

Personality traits drive people's financial decisions and hence affect their lives. Yet, we know little about the relationship between personality traits and insurance decisions. Do Risk-Taking, the Big Five and Locus of Control predict a variety of personal insurance decisions? Using a sample of 14,624 German adults with the goal of identifying associations between personality and insurance demand, we found that personality traits predict demand for various insurance types. We also found that associations may be mediated by demographic variables and may depend on the statistical modeling approach (e.g., including nonlinear relationships or examining between- and within-person effects). These findings contribute to our understanding of the role of personality in insurance demand and highlight the need for further exploration of this relationship, as our results demonstrate that personality-insurance-demand-associations depend on the examined insurance type.

Big Five personality traits predict small but robust differences in civic engagement.

OBJECTIVE: This preregistered study provides robust estimates of the links between Big Five personality traits and civic engagement across different samples and life stages. METHODS: We recruited two samples from the United States and United Kingdom (total N = 1593) and measured Big Five domains, Big Five aspects, and six civic engagement indicators: volunteerism, charitable giving, donating blood, posthumous organ donation, political voting, and vaccination. We compared the links between these measures across samples and tested moderation across life stages and several sociodemographic variables. We explored whether these links replicate between self- and peer-reports. RESULTS: We found small but robust effects. Agreeable, extraverted, and open/intellectual participants reported more civic engagement, especially volunteerism and charitable giving. Neurotic and conscientious participants mainly reported less civic engagement, especially blood and organ donations. One of the two Big Five aspects often drove these links, such as Compassion in the link between Agreeableness and volunteerism. We found some differences between younger and middle-aged adults. CONCLUSIONS: Big Five personality traits predict civic engagement modestly but consistently, with adequate study power being critical to detecting these links. Lower-order traits, such as Big Five aspects, clarify the relationships between traits and engagement. Life stages and sociodemographic variables have limited effects.

Effects of Reference Group Instructions on Big Five Trait Scores.

People responding to personality questionnaires rate themselves by comparing themselves to some reference group, but this reference group is typically not specified. In this study, we examined the differences between Big Five trait scores when people responded to trait questionnaires without a specified reference group, as is typical in personality assessment, and when they were asked to compare themselves to people in general, close others, people their age, people their same gender, their ideal self, or their past self. We found that personality scores tended to be more adaptive for between-person comparisons than for within-person comparisons. We also found that unprompted instructions produced mildly higher scores across all traits. There were few differences among between-person reference group conditions. Men rated themselves as slightly more agreeable when comparing themselves to other men. Implications for basic and applied personality assessment are discussed.

A motivational framework of personality development in late adulthood.

Meta-analytic evidence shows that most personality traits tend to increase through early adulthood and middle age but decrease in late adulthood, whereas Emotional Stability continues to increase throughout late adulthood. We propose that these normative patterns of personality development can be explained by motivational theories of aging. Specifically, decreases in Extraversion, Agreeableness, Conscientiousness, and Openness to Experience may reflect a reduced capacity to control one's environment, whereas continued increases in Emotional Stability reflect increases in individual's ability to compensate and cope with age-graded losses. Pairing motivational theories of aging with longitudinal evidence in personality science provides an explanation for empirical patterns of personality trait development and raises interesting possibilities to promote healthy aging.

Codevelopment of life goals and the Big Five personality traits across adulthood and old age.

Since the new millennium, research in the field of personality development has focused on the stability and change of basic personality traits. Motivational aspects of personality and their longitudinal association with basic traits have received comparably little attention. In this preregistered study, we applied bivariate latent growth curve model to investigated the codevelopment of nine life goals and the Big Five traits. We tested age, perceived control, gender, educational background, and regional socialization as potential moderators of codevelopment. Data came from the German Socio-Economic Panel study (N = 55,040, age range: 18-103 years) and span a study period of 13 years. During this period, the Big Five traits and life goals were assessed four times. Our findings suggest that development in broader life goal domains (e.g., self-fulfillment) is more strongly connected to personality development across the life span, whereas changes in specific goals (e.g., having children) are more closely tied to trait changes during young and middle adulthood. The strongest codevelopment was found between Openness and agentic goals with a focus on personal growth followed by codevelopment between Agreeableness and communal goals. Developmental stage and educational background moderated the codevelopment of Conscientiousness and economic achievement as well as family-related goals. Contrary to the previous research, we found that Neuroticism codeveloped with communal life goals (i.e., having a happy relationship/marriage). Our findings reinforce theoretical frameworks that highlight the role of changing opportunities, constraints, and developmental tasks across adulthood. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Subjective experiences of life events match individual differences in personality development.

The last 2 decades have witnessed increased research on the role of life events in personality trait development, but few findings appear to be robust. We propose that a key to resolving this issue is incorporating individuals' subjective experiences into the study of event-related development. To test this, we developed and administered a survey about event-related personality change to a representative Dutch sample (N = 5,513, Ages 16-95) and linked their responses to 12-year trajectories of measured Big Five development. Most participants (63%) believed that a life event impacted their personality in the past 10 years, on average 5 years presurvey. These participants, even those who experienced the same event, had markedly heterogenous perceptions of how their traits changed and why each event affected their personality. In preregistered analyses, we examined participants' individual personality trajectories before and after the event that they identified as most impactful. Across events, retrospective perceptions of event-related personality change were significantly correlated with short-term and long-term postevent personality trajectories across Big Five traits (mean rs = .22, .28) and preevent trajectories in all traits except agreeableness (mean r = .16). We also found correspondence between perceived and measured development in analyses of the two most commonly reported personality-changing events: health problems and death of a loved one/family member. Finally, we explored associations between personality development and perceived change-inducing event characteristics. Using these findings, we argue that future research into event-related personality development should de-emphasize mean-level change to focus on individuals' varied experiences of whether, when, how, and why life events have affected their personality. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Meta-analysis of personality trait differences between omnivores, vegetarians, and vegans.

Vegetarian and vegan diets have been increasing in the Western world. Recent research has focused on personality trait differences between dietary groups, in part because personality traits are broad characteristics that can integrate findings about different factors that motivate vegetarian or vegan diets. Previous research on personality predictors of vegetarian and vegan (veg*n) diet, however, has yielded inconsistent results. The goal of this study was to integrate the existing results of Big Five personality differences between veg*ns and omnivores as well as between vegetarians and vegans. To this end, we meta-analyzed data from 15 studies and N = 69,576 individuals from several countries. Results indicated that veg*ns were significantly higher in Openness (d = 0.40) and Agreeableness (d = 0.17) than omnivores, while vegans were significantly higher in Openness (d = 0.14) than vegetarians. This work isolates Openness and Agreeableness as important trait predictors of plant-based diets and sets the stage for future work on the factors that motivate vegetarian or vegan diet. Personality traits can provide an integrative framework for conceptualizing dietary preferences, be used to make predictions about the sources, course and correlates of dietary choices, and potentially be useful for advocates and policymakers seeking to tailor meat-reduction interventions.

Self-Esteem and Income Over Time.

There is robust evidence that people with higher incomes tend to have higher self-esteem, but little is known about how changes in income and self-esteem are related within individuals. Some theories predict that increased earnings lead to higher self-esteem, others that increased self-esteem leads to higher earnings, and still others that there should be no within-person associations between these variables. We tested these theories in 4-year longitudinal data from more than 4,000 adult participants from a Dutch representative sample. Results indicated significant between-person associations between income and self-esteem, consistent with prior research. Within-person effects suggested that increases in self-esteem are a function of previous increases in income more than the other way around. These links held when analyses controlled for employment status, and they generalized across gender, age, and educational background. Overall, the findings provide evidence for theories that consider self-esteem as both a source and a consequence of personal earnings.

Psychological change before and after religious conversion and deconversion.

OBJECTIVE: Theory and anecdotal evidence suggest that people undergo psychological changes before and after religious conversion and deconversion. Yet, existing research provided inconclusive evidence. Here, we examined psychological change before, during, and after institutional conversion and deconversion in a large-scale longitudinal study. METHOD: We used 11-wave longitudinal data from a nationally representative sample of Dutch adults (N ~ 20,000) to assess changes in religious beliefs and practices, personality traits, and well-being before, during, and after conversion to and deconversion from Christianity. RESULTS: Converts (N = 181) increased in service attendance and prayer, but not in their belief in God, as they approached conversion. Deconverts (N = 450) declined in religious beliefs and practices before, during, and after deconversion. In terms of personality, converts displayed small, unexpected declines in emotional stability, extraversion, and agreeableness at time of conversion. Deconverts declined in agreeableness, conscientiousness, and openness at time of deconversion. Neither group showed changes in their well-being. CONCLUSION: The present findings suggest that psychological changes during religious conversion and deconversion are generally small and mostly manifest as changes in people's religious beliefs and practices. Findings are discussed in the context of person-religion fit, meaning-making, and sociocultural motive perspectives on religious change.

Personality, self-knowledge, and meat reduction intentions.

OBJECTIVE: Meat consumption has a host of serious negative consequences for nonhuman animals, underprivileged humans, and the natural environment. Several interventions have been developed to encourage meat reduction but to relatively limited effect. There is also a range of established predictors of meat consumption, but much less is known about the factors that predict intentions to reduce meat consumption. The goal of this study was to determine the roles of personality and self-knowledge in meat reduction intentions. METHOD: In this set of three preregistered studies, we tested brief interventions to encourage meat reduction intentions and examined personality predictors of intentions to reduce meat consumption. RESULTS: We found no evidence that brief interventions with or without a self-knowledge component had a meaningful effect on changing meat reduction intentions. However, we found robust evidence for relatively small associations between intending to eat less meat and high Openness to Experience, high Emotionality, and perceiving meat reduction as moral behaviors. CONCLUSION: Individual differences may be a more influential predictor of meat reduction intentions than brief interventions. Implications for promoting meat reduction are discussed.

Transactional effects between personality and religiosity.

Do changes in religiosity beget changes in personality, or do changes in personality precede changes in religiosity? Existing evidence supports longitudinal associations between personality and religiosity at the between-person level, such that individual differences in personality predict subsequent individual differences in change in religiosity. However, no research to date has examined whether within-person changes in personality lead to subsequent changes in religiosity. Using random intercept cross-lagged panel models (RI-CLPM), we investigated between- and within-person associations between the Big Five personality traits and three aspects of religiosity-belief in God, service attendance, and prayer-in a sample of over 12,000 Dutch individuals across 11 annual assessments. We found between-person associations between all Big Five traits and religiosity, yet within-person associations only between agreeableness as well as extraversion and belief in God. Specifically, individuals who increased in agreeableness or extraversion reported subsequent increases in their belief in God and, in addition, individuals who increased in their belief in God showed subsequent increases in agreeableness. We further identified significant moderating effects of gender, religious upbringing, and religious affiliation. Overall, the present findings suggest that the associations between personality traits and religiosity primarily occur at the between-person level. However, the evidence for intraindividual associations between agreeableness, extraversion, and religious belief highlights the importance of distinguishing between-person from within-person effects to broaden the understanding of the temporal dynamics between variables. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Disentangling self-concept clarity and self-esteem in young adults.

Self-concept clarity and self-esteem are powerful determinants of people's thoughts, feelings, and behaviors. Yet, even after over 30 years of research, the conceptual and empirical ties between these two self-aspects remain understudied, and little is known about the nature and function of their relationship. The present study aimed at discerning the empirical similarities and differences between self-concept clarity and self-esteem in order to examine whether they can be considered sibling constructs that are conceptually and empirically related, but not identical. Specifically, we used multivariate eight-wave longitudinal data from two cohorts of young adults (Cohort 1, N = 460; Cohort 2, N = 412) to examine the structural, cross-sectional, and longitudinal links between self-concept clarity and self-esteem, as well as their incremental validity and within-person transactions over time. We found strong evidence that self-concept clarity and self-esteem are not the same but sibling constructs. Specifically, both self-aspects were as follows: (a) structurally different and (b) cross-sectionally related, (c) shared similar but not identical developmental trajectories, (d) codeveloped over time, (e) demonstrated incremental validity in the prediction of important life outcomes, and (f) demonstrated distinctive within-person associations over time. Overall, the present study provides the most comprehensive demonstration that self-concept clarity and self-esteem are similar but different in several meaningful ways, which is of crucial importance for theory, research, and practice. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The link between personality, global, and domain-specific satisfaction across the adult lifespan.

Meta-analytic evidence has shown that personality is one of the strongest correlates of global and domain-specific satisfaction. The main goal of the present study was to examine whether the associations between personality traits and satisfaction differ across the adult lifespan. We used bivariate latent growth curve models and local structural equation modeling to study correlations between levels and change of Big Five personality traits and satisfaction with life, satisfaction with work, and satisfaction with social contacts. Data came from a large representative longitudinal Dutch sample (N = 9,110; age range 16-95). Across age, emotional stability showed the strongest associations with both global and domain-specific satisfaction. After emotional stability, conscientiousness was the strongest correlate of work satisfaction (WS), and extraversion and agreeableness were the strongest correlates of social satisfaction (SS). Longitudinal changes in personality and satisfaction across the 11 years covered in this study were moderately correlated, suggesting codevelopment between these constructs. Most correlational patterns were stable across the lifespan, indicating that personality traits are similarly relevant for satisfaction across different phases in adult life. We discuss the theoretical implications for the foundations that may underlie the link between personality and satisfaction in various life phases. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Nature and Impact of Reference Group Effects in Personality Assessment Data.

People have a tendency to engage in social comparisons when evaluating and reporting on personality. This tendency and variation in who people compare their personality to is known as the reference group effect and has been largely discussed in cross-cultural research. However, reference group effects have implications beyond cross-cultural research and should be considered when collecting and interpreting personality data. In the present study, we examined the nature and impact of reference group comparisons on the Big Five personality traits in a sample of N = 1194 participants. Specifically, we examined what reference groups participants most believed they compared their personality to, and which reference group was actually the most impactful on trait scores. We found that most people believed they compared their personality to people in general. However, the most influential reference group was people the same age as the participants. Moreover, we found that people mostly engaged in between- as opposed to within-person comparisons when evaluating their own personality. Overall, our findings highlight that people have relatively little insight into the comparisons they engage in when make judgments on personality. Discussion focuses on theoretical and practical implications of our findings in light of personality assessment data.

Personality aspects and proenvironmental attitudes.

OBJECTIVE: Climate change is a serious threat. Personality psychologists can help address this threat by understanding what kind of people tend to endorse proenvironmental attitudes and engage in sustainable behavior. Previous research supports reliable associations between proenvironmental attitudes and personality traits. However, this research has generally aggregated different kinds of attitudes into a single composite and has focused on the domain level of personality traits. METHOD: This study explored how 10 lower-order aspects of the Big Five personality traits were related to eight different proenvironmental attitudes in three convenience samples from the United States (N = 1234; 1000) and the United Kingdom (N = 538). RESULTS: All five trait domains were related to at least one proenvironmental attitude across all three samples. Seven of eight proenvironmental attitudes could be predicted by one or more traits in all three samples. We also found evidence that the Openness aspect of Openness to Experience was a more consistent predictor of proenvironmental attitudes than the Intellect aspect. In contrast, there was little benefit in distinguishing between the aspects of other trait domains. We did not find evidence that age or political orientation moderated the associations between proenvironmental attitudes and personality. CONCLUSION: Results point to the need for more fine-grained research on individual differences in proenvironmental attitudes and behavior.

Personality stability and change: A meta-analysis of longitudinal studies.

Past research syntheses provided evidence that personality traits are both stable and changeable throughout the life span. However, early meta-analytic estimates were constrained by a relatively small universe of longitudinal studies, many of which tracked personality traits in small samples over moderate time periods using measures that were only loosely related to contemporary trait models such as the Big Five. Since then, hundreds of new studies have emerged allowing for more precise estimates of personality trait stability and change across the life span. Here, we updated and extended previous research syntheses on personality trait development by synthesizing novel longitudinal data on rank-order stability (total k = 189, total N = 178,503) and mean-level change (total k = 276, N = 242,542) from studies published after January 1, 2005. Consistent with earlier meta-analytic findings, the rank-order stability of personality traits increased significantly throughout early life before reaching a plateau in young adulthood. These increases in stability coincide with mean-level changes in the direction of greater maturity. In contrast to previous findings, we found little evidence for increasing rank-order stabilities after Age 25. Moreover, cumulative mean-level trait changes across the life span were slightly smaller than previously estimated. Emotional stability, however, increased consistently and more substantially across the life span than previously found. Moderator analyses indicated that narrow facet-level and maladaptive trait measures were less stable than broader domain and adaptive trait measures. Overall, the present findings draw a more precise picture of the life span development of personality traits and highlight important gaps in the personality development literature. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Unraveling the complex relationship between work transitions and self-esteem and life satisfaction.

Transitions in and out of work are common experiences with major repercussions for people's lives. The complex link between work transitions and psychological adjustment is not well understood, however. In this preregistered study, we analyzed 11 waves of longitudinal data from a representative sample of 13,671 Dutch participants to examine the transactional effects between repeated work transitions (employment and unemployment) and psychological adjustment (self-esteem and life satisfaction). We investigated change trajectories before and after the transitions and tested whether event-related characteristics moderated transition effects. Participants with higher levels of self-esteem and life satisfaction were less likely to experience unemployment and more likely to experience employment, indicating selection effects. Participants decreased in their self-esteem and life satisfaction before the beginning of unemployment indicating anticipatory effects, with larger decreases in self-esteem for participants who ended up experiencing longer unemployment. We found no effects of employment on changes in life satisfaction or self-esteem (except when accounting for unemployment), but participants entering more satisfying jobs showed larger increases in life satisfaction. Results were mostly robust when accounting for gender, age, socioeconomic status, and the Big Five traits, and when using propensity-score matching. Effects did not differ among multiple experiences of the same transition. Together, these findings point to dynamic transactions between employment/unemployment and self-esteem/life satisfaction. Findings highlight the importance of closely assessing the specific timing of pre- and posttransition changes and the existence of large individual differences in reactions to work transitions that seem to be partly explained by event-related characteristics. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Assessing Personality Change: Introduction to the Special Section.

Both clinical and personality psychologists are interested in assessing personality change, although they have tended to approach the issue in different ways. In this paper we argue that both sub-fields should focus more on basic issues in the assessment of personality change, and that they would make more progress on this issue together than alone. This Special Section on the Assessment of Personality Change includes four papers by researchers working primarily in basic personality science. Each paper addresses specific ways to advance the assessment of personality change that have both basic and applied clinical relevance, but collectively they show how far the field still has to go.

Selection and socialization effects of studying abroad.

OBJECTIVES: Studying abroad is often considered a life-changing experience. However, research on studying abroad has not always disentangled selection from socialization effects, leading to uncertainty about the actual impact of this experience. In this 4-wave longitudinal study, we examined both selection and socialization effects of a 4-week intensive study abroad program on 17 psychosocial variables related to motivation, academic achievement, well-being, and self-reflection. METHOD: We used propensity score matching and multiple-group growth curve models to examine selection and socialization effects in a sample of sojourners (n = 145) and non-sojourners (n = 291). RESULTS: We found selection effects for several variables related to students' motivation and well-being. Contrary to our predictions, we found no evidence for socialization effects of studying abroad on any of the outcome variables. CONCLUSIONS: Students who are relatively more intrinsically motivated and emotionally healthy appear to be more likely to study abroad. However, studying abroad for one month does not appear to lead to meaningful and lasting psychological change, on average. Our results highlight the need to examine both selection and socialization effects of study abroad programs with longitudinal data and well-matched comparison groups.