Ethnic identity centrality across the adult lifespan: Aging, cohort, and period effects among majority and minority group members.

Ethnic identity is a major area of study across many disciplines including psychology, sociology, anthropology, and political science. Yet, little is known about changes in ethnic identity across the adult lifespan, and whether such changes are driven by normal aging processes (aging effects), unique societal influences linked with one's formative years (cohort effects), or social changes during a specific time frame (period effects). We address these key oversights by utilizing 13 annual waves of longitudinal panel data from a nationwide random sample of both ethnic majority (N = 49,660) and Indigenous ethnic minority (N = 8,325) group members in New Zealand to examine changes in ethnic identity centrality using cohort-sequential latent growth modeling. This approach helps to identify changes in mean levels of ethnic identity centrality over time and whether such changes are driven by aging, cohort, and/or period effects. Our data reveal that, among both ethnic majority and ethnic minority individuals, changes in ethnic identity centrality were informed by a combination of normative aging processes, societal circumstances that reflected the unique historical context in which people grew to maturity, and societal changes during the 13 annual assessments of our study. Collectively, these results demonstrate for the first time that ethnic identity centrality in adulthood is subject to lifelong changes. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Fixed or Fluid? Sexual Identity Fluidity in a Large National Panel Study of New Zealand Adults.

Sexual orientation has been defined as an enduring aspect of the self, but emerging evidence reveals that people's sexual attractions, behaviors, and identities can shift over time. To examine this possibility, we present a large longitudinal analysis of sexual orientation identity fluidity among New Zealand adults (Ntotal = 45,856; age = 18-99; lesbian, gay, bisexual, and other sexual minority (LGB+) ns = 746-3,387). Over seven years, 5.7% of participants changed sexual identities at least once. Change was bi-directional (i.e. toward and away from LGB+ identities) and most common in people who initially reported a plurisexual identity. Although women reported higher rates of plurisexuality than men, they were not more fluid in their identities, contradicting the notion of male fixedness and female plasticity in sexuality. Moreover, openness to experience was associated with increased odds of changing from a heterosexual to a plurisexual identity, while political liberalism and lower conscientiousness were associated with increased odds of changing from a heterosexual to a plurisexual identity and more identity changes over time. Overall, our study shows that sexual identity can be fluid into adulthood and has implications for how we understand contemporary human sexuality.

Examining the indirect effect of income on well-being via individual-based relative deprivation: Longitudinal mediation with a random intercept cross-lagged panel model.

Although the positive relationship between income and well-being is well established, the psychological mechanisms underlying this process are less understood. One underexplored explanation is that objective wealth (or lack thereof) fosters relative comparisons, which, in turn, predicts well-being. Extant work has, however, mostly focused on objective indicators of relative deprivation rather than on how people perceive their societal status. We address this oversight by examining the longitudinal indirect effects of income on well-being via perceived individual-based relative deprivation (IRD) using traditional and random intercept cross-lagged panel models. Averaged across 10 annual assessments in a nationwide longitudinal panel sample of adults (N = 66,560), our results revealed reliable indirect effects of income on well-being via IRD. Specifically, within-person increases in income predicted within-person decreases in IRD, which then predicted within-person increases in personal well-being over time. Our results replicated across robustness checks, including one using a general life satisfaction measure. We thus extend previous work by highlighting the need to consider one's perceptions of their relative societal position as a mechanism underlying the effects of income on well-being over time.

Thinking twice: examining gender differences in repetitive negative thinking across the adult lifespan.

Background: A wealth of literature shows that women report greater levels of repetitive negative thinking, particularly rumination, than men in adolescence and adulthood. However, little research has examined how these gender differences develop or change across the entire adult lifespan. Methods: The present study addresses these oversights using a nationwide longitudinal probability sample of adults over 12 annual assessment points (N = 64,901; Mage = 42.50, range 18-81; 62.9% women) and a single-item measure of global repetitive negative thinking. Critically, we use multigroup cohort-sequential latent growth modeling to determine whether changes in this construct over time are due to (a) normative aging, (b) generational differences associated with the historical period one was born and raised in, or (c) a combination of these processes. Results: Our results reveal that rumination peaks in young adulthood for both women and men but declines steadily thereafter, reaching its lowest levels at the end of the adult lifespan. That said, some gender and cohort differences emerged, with young women-particularly young cohorts-reporting higher levels of rumination than their male counterparts and older birth cohorts. Discussion: Our study suggests that gender differences in rumination may be most prevalent among young birth cohorts, though future research is needed to elucidate the mechanisms underlying these processes.

Perceived Relative Deprivation Across the Adult Lifespan: An Examination of Aging and Cohort Effects.

Despite being a core psychological construct for over 70 years, research has yet to examine how perceptions of deprivation relative to other individuals and/or groups develop across adulthood. As such, this preregistered study uses cohort-sequential latent growth modeling to examine changes in individual- and group-based relative deprivation (IRD and GRD, respectively) across the adult lifespan. Across 10 annual assessments of a nationwide random sample of adults (Ntotal = 58,878; ethnic minority n = 11,927; 62.7% women; ages 21-80), mean levels of IRD trended downward across the lifespan, whereas mean levels of GRD generally increased from young-to-middle adulthood before declining across late adulthood. Subtle cohort effects emerged for both constructs, although both IRD and GRD largely followed a normative aging process. Critically, the development of GRD-but not IRD-differed between ethnic groups, providing insights into how one's objective status may shape subjective (dis)advantage over time.