"I felt so old this morning." Short-term variations in subjective age and the role of trait subjective age: Evidence from the ILSE/EMIL ecological momentary assessment data.

Subjective age, how old people feel compared to their chronological age, is a central indicator of age identity and highly predictive for developmental outcomes. While mostly used as a trait-like concept in previous research, recent studies employing experimental designs and daily assessments suggest that subjective age can vary after experimental manipulations or between days. However, less is known about whether subjective age varies over even shorter time frames such as within moments on a given day, how such short-term variability differs by age and its association with trait subjective age. We examined these questions with data obtained from 123 young-old (Mage = 67.19 years) and 47 old-old adults (Mage = 86.59 years) who reported their momentary subjective age six times a day over 7 consecutive days as they were going about their everyday lives. Participants felt younger on a large majority of occasions, and 25% of the total variability in subjective age could be attributed to within-person variation. Within-person variability in subjective age amounted to an average of about 3 years from one moment to the next and did not differ between age groups. However, those with younger trait subjective ages exhibited larger moment-to-moment variation. Our findings extend the literature on subjective age by showing that how old people feel can vary on a momentary basis and that state and trait components of subjective age are related. Further research should investigate the contextual predictors of variability in subjective age and the links between trait and state concepts and developmental outcomes. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

20-year trajectories of health in midlife and old age: Contrasting the impact of personality and attitudes toward own aging.

Personality traits affect health throughout adulthood. Recent research has demonstrated that attitudes toward own aging (ATOA) also play an important role in various health outcomes. To date, the role of personality versus ATOA for health has rarely been considered in parallel and contrasted for different periods of the second half of life, such as midlife versus early old age. We posit that with advancing age, associations of personality and ATOA with trajectories of health might change. To address this assumption, we examined trajectories of physician-rated health and its between-person and time-varying, within-person associations with personality (neuroticism and conscientiousness) and ATOA over 20 years in middle-aged (baseline age 43-46 years; n = 502) and older (61-65 years; n = 500) adults. Based on longitudinal multilevel regression models (controlling for gender and education), we found at the between-person level that lower neuroticism scores and more positive ATOA scores were independently associated with better physician-rated health at baseline. This association of ATOA with health was stronger in the old age sample than in the midlife sample. At the within-person level, time-varying associations revealed that both middle-aged and older individuals had better physician-rated health on measurement occasions when they reported more favorable ATOA. In addition, in the old age subsample alone, individuals' physician-rated health was better on occasions when they had higher conscientiousness scores. Our findings suggest that certain personality traits (conscientiousness, but not neuroticism) as well as attitudes toward own aging may gain in importance in later life as predictors of objective health changes. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Change in attitudes toward aging: Cognitive complaints matter more than objective performance.

Converging longitudinal research suggests that more negative views on aging predict accelerated cognitive decline. Although conceptually suggested, reciprocal relationships between cognitive functioning and attitudes toward aging have remained less clear empirically. We used the 20-year data from the Interdisciplinary Longitudinal Study of Adult Development (ILSE) to better understand such potential bidirectionality. Drawing on 1,002 baseline participants from 2 age groups, a midlife (Mage = 43.7 at baseline) and an old age group (Mage = 62.5 at baseline), we examined longitudinal trajectories between attitude toward own aging, performance-based cognitive measures, and subjective cognitive complaints. Findings from multigroup latent growth curve modeling replicated previous findings that attitude toward own aging predicts cognitive change over 20 years in old age with 2 important specifications: We show that this effect (a) does not apply to midlife and (b) disappears in old age after controlling for depression over time. Further, as expected, cognitive complaints but not cognitive performance were related to change in attitude toward own aging in midlife and old age. Results suggest that differentiating between objective cognitive functioning and subjective cognitive complaints is important when investigating relations between cognitive functioning and attitude toward own aging in different age groups. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Cohort differences in adult-life trajectories of internal and external control beliefs: A tale of more and better maintained internal control and fewer external constraints.

Life Span theory posits that sociohistorical contexts shape individual development. In line with this proposition, cohort differences favoring later-born cohorts have been widely documented for cognition and health. However, little is known about historical change in how key resources of psychosocial functioning such as control beliefs develop in old age. We pooled data from 3 independent samples: Berlin Aging Study (6 waves, N = 414); Interdisciplinary Longitudinal Study of Adult Development (4 waves, N = 925); and Berlin Aging Study II (4 waves, N = 1,111) to construct overlapping multiyear longitudinal data from ages 61 through 85 years for cohorts born 1905 to 1953 and examine historical changes in within-person trajectories of internal and external control beliefs. Results revealed that earlier-born cohorts exhibit age-related declines in internal control beliefs regarding both desirable and undesirable outcomes, whereas later-born cohorts perceive higher internal control and maintain this advantage into old age. Earlier-born cohorts also experience steep age-related increases in external control beliefs regarding both powerful others and chance, whereas later-born cohorts perceive lower external control and were stable across old age. Education and gender disparities in control beliefs narrowed over historical time. Sociodemographic, physical health, cognitive, and social factors explained some of the differences in control beliefs, and accounted for sizable portions of cohort effects. Our results indicate that current generations of older adults perceive more and better maintained internal control and fewer external constraints. We discuss potential underlying mechanisms and consider conceptual and societal implications of our findings. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

The interplay of personality and attitudes toward own aging across two decades of later life.

Big Five personality traits are assumed to be linked with attitudes toward own aging. Since both constructs have central importance for the aging process, it is surprising that to our knowledge no study so far comprehensively addressed their mutual connection over time. We used data from the ILSE study, a longitudinal study capturing personality and attitudes toward own aging at four measurement occasions, spanning 20 years and including two participant cohorts in midlife (n = 501; born 1950-52) and later life (n = 500; born 1930-32). Dual latent change score models showed that personality was longitudinally related to change in attitudes toward own aging: Lower Neuroticism, higher Conscientiousness, and higher Openness predicted more positive attitudes, whereas the direction of the effect for Extraversion varied by time. Furthermore, the role of personality seems to be confined to certain sensitive periods in midlife and early old age. Contrary to our expectations, attitudes toward own aging had only marginal longitudinal impact on the Big Five. Our results shed light on the developmental co-dynamics of personality and subjective perceptions of aging across the second half of the lifespan.

Negative emotions and chronic physical illness: A lifespan developmental perspective.

OBJECTIVE: Our primary goal was to test the idea that the link between negative emotions and chronic physical illness will become stronger as individuals age and their resources become increasingly limited. METHOD: The data came from a 4-wave longitudinal study obtained from a sample of middle-aged (n = 500, mean age = 44.17, SD = .91) and older (n = 502, mean age = 62.87, SD = .89) adults who were observed for, on average, 13.59 years (SD = 7.32). Negative emotions were assessed by a subscale of the Zung depression scale and chronic illness severity was operationalized as a physician-rating. RESULTS: Among older adults the association between changes in negative emotions and changes in physical illness status emerged over time (first retest interval: r = .02; p = .42; second interval: r = .11; p = .01; third interval: r = .22; p < .01), whereas such dynamics were not observed among middle-aged adults (first retest interval: r = .01; p = .77; second interval: r = .06; p = .12; third interval: r = -.01; p = .79). In addition, among older adults, negative emotions were generally higher and illness severity worse than in middle-aged adults. Negative emotions and chronic physical illness increased over time only in the older subsample. CONCLUSION: Research interested in linking negative emotions and poor physical health will benefit from a lifespan developmental perspective. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Attitude toward own aging as a risk factor for cognitive disorder in old age: 12-year evidence from the ILSE study.

Previous research has demonstrated the harmful impact of subjective aging processes (e.g., negative age self-stereotyping) on normal cognitive aging in different domains of cognitive functioning, such as memory, executive function, and fluid abilities. Recently, subjective aging has also been linked to important biomarkers of Alzheimer's disease (AD) and dementia-related outcomes, indicating associations with pathological cognitive aging. With data from the Interdisciplinary Longitudinal Study of Adult Development and Aging (ILSE), the present study extends this research by examining the long-term effect of attitude toward own aging (ATOA) on expert-based clinical diagnosis of mild cognitive impairment (MCI) and AD in old age. In the study, 260 initially cognitively healthy participants with a mean age of 62.5 years were followed for 12 years. In the course of the study, 103 participants developed MCI and 14 received diagnosis of AD. Logistic regression models showed that baseline ATOA predicted future clinical diagnoses of MCI and AD 12 years later, while controlling for sociodemographic, genetic, and health variables. Although theoretically suggested, evidence for a mediating role of leisure-activity level and control beliefs was scarce. Our findings add to the emerging literature supporting negative views of aging as a risk factor for cognitive disorder in old age. (PsycINFO Database Record

The Role of Attitude Toward Own Aging for Fluid and Crystallized Functioning: 12-Year Evidence From the ILSE Study.

Objectives: Aging attitudes have been shown to affect a variety of important developmental outcomes in old age, including memory. Extending previous research, the present study examined long-term effects of attitudes toward own aging (ATOA), relying on a broader range of cognitive abilities in later life. Method: Data came from the Interdisciplinary Longitudinal Study of Adult Development and Aging (ILSE), with three measurement waves (1993/1994, 1997/1998, and 2005/2006) covering a 12-year interval. Drawing on the older of two available birth cohorts (1930-1932; n = 500), we analyzed the relationship between ATOA and change in fluid versus crystallized abilities based on overall and gender-specific latent change score models, while controlling for education and objective health. Results: As expected, ATOA predicted change in fluid functioning-but not in crystallized performance-over 12 years. Gender-specific analyses revealed a stronger association between ATOA and decline in fluid abilities for men, even after controlling for health and education. Discussion: This study adds to the understanding of long-term implications of aging attitudes for cognitive decline trajectories and shows that negative aging attitudes are a risk factor for age-vulnerable cognitive abilities, particularly among men. Further research is needed to better understand the underlying mechanisms of observed relationships.