Does the positive association between social relationships and cognition continue until very old age?

In current research, social relationships are increasingly recognized for their positive associations with cognitive outcomes in older adults. One of the most vulnerable groups for cognitive decline are very old adults (80+ years). However, they are relatively underrepresented in the field. Therefore, our study aimed to test if social relationships remain a protective factor against cognitive decline in very old age, using a representative sample from the Study of Quality of Life and Well-Being in North-Rhine Westphalia (NRW80+ Study). We hypothesized that social characteristics would be positively associated with global cognition and episodic memory cross-sectionally and would predict cognitive performance two years later. 1.207 very old adults were included in the representative, cross-sectional analyses, and 639 in the panel analyses. They were aged between 80 and 103 years and showed no signs of dementia. The associations between various social aspects and cognitive functions were investigated using hierarchical linear regression, controlling for relevant sociodemographic and health characteristics. Cross-sectionally, leisure engagement was positively associated with episodic memory (β = 0.53 [0.26, 0.79], p < .01) and global cognition (β = 0.50 [0.22, 0.79], p < .01), while overall network size was positively associated with global cognition (β = 0.04 [0.02, 0.07], p < .01). In contrast, we observed no associations between baseline social relationships and cognitive functions two years later. The findings suggest that while social relationships are associated with cognitive functions in very old age, short-term protective effects such as over two years may be less robust compared to other age groups.

Life Course Associations of Sibling Relationships and Cognitive Functioning in Late Adulthood

OBJECTIVES

Relying on the linked lives concept within the life course perspective, the current study examined the lifelong associations of sibling relationships and their effects on cognitive functioning in late adulthood.

METHODS

Using data from the sibling cohort of the Wisconsin Longitudinal Study, we estimated a mediational model, examining the effects of childhood sibling interactions and adverse childhood experiences (ACEs), as proxy measures for the parent-child relationship, on cognitive functioning in late adulthood through adult sibling closeness and contact. Respondents' cognitive functioning was assessed using the Telephone Interview for Cognitive Status-modified (TICS-m) when they were in their early 80s, on average. We conducted multilevel structural equation modeling.

RESULTS

Positive childhood sibling interactions (e.g., hugging, helping) were associated with increased adult sibling closeness and contact, whereas higher cumulative ACEs were associated with decreased adult sibling closeness and contact. We found significant indirect associations: (a) positive sibling interactions during childhood were associated with more frequent sibling contact across respondents' mid-50s through early 70s, which was in turn associated with higher TICS-m scores in their early 80s; (b) higher cumulative ACEs were associated with less frequent sibling contact, which was in turn associated with lower TICS-m scores.

DISCUSSION

The results suggest that childhood experiences within the family of origin may have lasting effects on adult sibling relationships and the cognitive functioning of older adults. This study highlights the potential cognitive benefits of frequent contact with adult siblings, underscoring the importance of nurturing sibling relationships throughout one's life.

Revisiting the musical reminiscence bump: insights from neurocognitive and social brain development in adolescence

Music listening is enjoyed across the lifespan and around the world. This has spurred many theories on the evolutionary purpose of music. The Music for Social Bonding hypothesis posits that the human capacity to make music evolved for the purpose of creating and preserving relationships between one another. Considering different time periods of music use across the lifespan, adolescence is especially a period of social reorientation away from family towards peers, characterized by new social bonds and increased prosocial behavior. This shift is accompanied by notable structural and functional changes in brain networks supporting reward processing and prosocial behavior. Reviewing the extant literature on developmental cognitive neuroscience and adolescent music use, we propose that neurocognitive changes in the reward system make adolescence an ideal developmental time window for investigating interactions between prosocial behavior and reward processing, as adolescence constitutes a time of relative increase in music reward valuation. Testing this hypothesis may clarify our understanding of developmental trajectories in music reward valuation, and offer insights into why music from adults' adolescence holds a great deal of personal significance.

Socioeconomic determinants of early childhood development: evidence from Pakistan

This study investigates the socioeconomic determinants of early childhood development (ECD) in Pakistan by utilizing the data of sixth wave of the Multiple Indicator Cluster Survey (MICS) conducted in the four provinces of the country. The findings of the study reveal that mother's education, father's education, economic status of the household as measured by household's wealth index quintile, region of residence (province), child's gender, disability, nutrition and the practices used by the adult members of the household to discipline child are important determinants of ECD. The study highlights the crucial role of family background and importance of addressing the issue of malnutrition to foster child development.

Advancing methods for the biodemography of aging within social contexts

Several social dimensions including social integration, status, early-life adversity, and their interactions across the life course can predict health, reproduction, and mortality in humans. Accordingly, the social environment plays a fundamental role in the emergence of phenotypes driving the evolution of aging. Recent work placing human social gradients on a biological continuum with other species provides a useful evolutionary context for aging questions, but there is still a need for a unified evolutionary framework linking health and aging within social contexts. Here, we summarize current challenges to understand the role of the social environment in human life courses. Next, we review recent advances in comparative biodemography and propose a biodemographic perspective to address socially driven health phenotype distributions and their evolutionary consequences using a nonhuman primate population. This new comparative approach uses evolutionary demography to address the joint dynamics of populations, social dimensions, phenotypes, and life history parameters. The long-term goal is to advance our understanding of the link between individual social environments, population-level outcomes, and the evolution of aging.

No Substitute for In-Person Interaction: Changing Modes of Social Contact during the Coronavirus Pandemic and Effects on the Mental Health of Adults in the UK

Life-course theories on how social relationships affect mental health are limited in causal claims. The restrictions in social contact during the coronavirus pandemic provided a natural experiment that modified the frequency of in-person contact and allowed us to estimate the effect of changes in in-person social contact frequency on mental health in four large nationally representative age-cohorts of adults living in the UK. There was consistent evidence of a small but statistically significant effect of less frequent social contact on anxiety-depression. Online modes of social contact did not compensate for the restrictions in in-person social contact during the pandemic. Young adults who increased their online social media frequency during the pandemic experienced a deterioration in mental health. Life-course theories cannot ignore the importance of the mode of social contact for social relationships, especially during young adulthood.

Psychometric Properties of the Chinese Version of the Brief Interpersonal Competence Questionnaire for Adolescents

This study aimed to evaluate the psychometric properties of the Brief Interpersonal Competence Questionnaire (ICQ-15) administered to Chinese adolescents. A sample of 1705 adolescents (Mean age = 14.08, SD = 3.22, 46.5% male) completed a questionnaire including the Chinese version of the ICQ-15, as well as measurements of well-being, psychological resilience, and depression. To examine the psychometric properties of the ICQ-15, item analyses (item-total correlation and normality test), confirmatory factor analysis, concurrent validity analyses, multi-group analyses, and internal consistency analyses were performed. The results of the item analyses suggested a good item-total correlation, and the item scores were distributed approximately normally. The confirmatory factor analysis showed that the five-factor model had acceptable fit indices. The concurrent validity analyses indicated that the Chinese version of the ICQ-15 had a satisfactory concurrent validity. The multi-group analyses proved the measurement invariance across females and males, as well as participants in early, middle, and late adolescence. The ICQ-15 demonstrated satisfactory internal consistency reliability among Chinese adolescents. The ICQ-15 presents good psychometric properties and can be used to assess interpersonal competence in Chinese adolescents.

Linked lives and convoys of social relations

We consider linked lives through the Convoy Model of Social Relations to illustrate their complexity, consequences, and development across contexts. To illustrate how the Convoy Model lens provides a unique opportunity to examine the multidimensional and dynamic character of linked lives across time and space, we analyze twenty-three years of longitudinal data from the Social Relations Study (SRS). The SRS is a regionally representative Detroit-area sample (N=1,498) with three waves (1992; 2005; 2015) of data from community dwelling people age 13 to 93. We present three illustrative examples of linked lives: 1) the influence of earlier life social network characteristics (size and closeness) on later life health outcomes; 2) the influence of social position (race and education) on relationship quality with spouse/partner and child over time; and 3) the influence of transitioning from working to retirement on network structure (size and geographic proximity). Findings illustrate linked lives through multiple instances of social relationships and as influenced by various contexts. Further, the consequences of linked lives for mental health are consistent across the life course while influence on physical health is variable. The Convoy Model presents key concepts to situate the ways in which linked lives form and function at various levels and across multiple contexts to have far reaching effects on life outcomes.

Relationship of social isolation with mental distress among older Korean Americans: The moderating role of social cohesion

Social isolation has been associated with poor mental health outcomes, particularly for older immigrants who do not have a protective social environment. The purpose of this study was to investigate the relationship of social isolation (living alone, marginal family ties and marginal friend ties) with mental distress and to examine the moderating role of social cohesion (family cohesion and community cohesion). We hypothesised that social isolation and social cohesion would be directly associated with mental distress and that social cohesion would buffer the influence of social isolation on mental distress. Data were drawn from the Study of Older Korean Americans (SOKA), which included 2150 older Korean Americans aged 60 or over in multiple areas, collected during 2017-2018. A series of hierarchical regression models of mental distress examined the direct and interactive role of social isolation and social cohesion. Approximately one-third of the sample lived alone, 20% had marginal family ties and 27% had marginal friend ties. All three indicators of social isolation had a significant direct effect on mental health; however, living alone lost its statistical significance with the inclusion of social cohesion variables. Both indicators of family and community cohesion were significantly associated with lower levels of mental distress. In addition, family cohesion buffered the negative effects of marginal ties to family and friends on mental distress. The significant role of a positive social environment must be considered when addressing the needs of older immigrants who are socially isolated.

Friendship in Later Life: Thirty Years of Progress and Inequalities

Studies examining the impact of social change on individual development and aging postulate the growing importance of flexible relationships, such as friendship. Although friendship is well known as a factor of well-being in later life, the prevalence of friendship in older adult networks and its unequal distribution has been examined only in few studies. Through secondary data analysis of two cross-sectional surveys carried out in Switzerland in 1979 and 2011, respectively, the increasing presence of close friends was confirmed. Our results show that this trend was part of a broader lifestyle change after retirement, with increasing social engagements. However, this trend does not include a general decrease in social inequalities in friendship opportunities. Overall, friendship increase among older adults has contributed to a polarization of living conditions, with a majority of active, healthy persons contrasting with a minority of individuals who accumulate penalties.

Longitudinal Within-Person Associations Between Quality of Social Relations, Structure of Social Relations, and Cognitive Functioning in Older Age

OBJECTIVES

Individuals' social connections and interpersonal experiences can both shape and be shaped by cognitive functioning. This study examines longitudinal within-person associations between quality of social relations, structure of social relations, and cognitive functioning in older age.

METHODS

We examined 16-year longitudinal data (3 waves) from 497 older adults (M = 66.07 years, SD = 0.83, range = 64-68 years) from the Interdisciplinary Longitudinal Study of Adult Development and Aging. Quality of social relations was measured by scales on perceived emotional support, instrumental support, and social integration. Structure of social relations was measured by self-reported number of leisure time partner types, indicating social network diversity. Cognitive functioning was assessed as a latent construct consisting of five cognitive tests (i.e., Information, Similarities, Letter Fluency, Picture Completion, Block Design). We used a random intercept cross-lagged panel model in the analysis.

RESULTS

At the within-person level, prior quality of social relations, but not structure of social relations, was positively associated with subsequent cognitive functioning. Moreover, prior cognitive functioning was positively associated with subsequent structure of social relations, but not with quality of social relations.

DISCUSSION

Quality of social relations is a protective factor of cognitive aging. Additionally, responding to prior lower cognitive functioning, social network diversity reduced, but quality of social relations did not seem to change. Overall, this study suggested that social relations and cognitive functioning mutually influence each other, but different aspects of social relations (i.e., quality, structure) might have different directional associations with cognitive functioning.

Active With Whom? Examining the Social Context of Physical Activity in Individuals After Stroke and Their Partners

Engaging in regular moderate-to-vigorous intensity physical activity (MVPA) is crucial to reduce future health risk for individuals living with the effects of a stroke and their partners. Although numerous studies point to the importance of social factors in physical activity engagement, little is known about with whom individuals after stroke and their partners engage in physical activity with and whether different physical activity companions are uniquely associated with MVPA. Eighty-nine community-dwelling individuals after stroke (M_age = 68.64, SD = 10.44; 74% male) and 83 partners (M_age = 66.04, SD = 9.91; 24% male) completed 14 consecutive days of daily life assessments that included wearing physical activity monitors (accelerometers) and self-reporting physical activity companions (n = 1,961 days). Results show that average levels of MVPA were correlated between partners (r = 0.38), as were day-to-day MVPA fluctuations (r = 0.34). Importantly, for individuals after stroke, being active with their partner, but not with any other physical activity companion, was linked with elevated daily MVPA. In contrast, for partners of individuals after stroke, engaging in physical activity with a variety of different companions (partner, other family member, friend, colleague) was each associated with higher MVPA in daily life. For both individuals after stroke and their partners being active by oneself (without a companion) on a given day was not associated with elevated MVPA. Findings suggest that interventions that promote physical activity engagement should consider the role of meaningful others, with the partner being particularly key for individuals living with chronic health conditions.

Investigating Posttraumatic Growth in Midlife Using an Intensive Longitudinal Research Design: Posttraumatic Growth Is Not as Prevalent as Previously Considered

The notion that adversity leads to enduring improvements in psychological functioning carries promise given the diverse adversities individuals confront over their life course. However, research on posttraumatic growth (PTG) has relied on cross-sectional research designs, which severely limit the ability to discern whether growth transpires following adversity. Our goal was to examine whether PTG is possible across a diverse array of outcomes and identify factors that promote PTG. We analyzed data from a longitudinal, prospective study that assessed midlife participants monthly for a period of 2 years. Over the study period, 276 participants experienced a major life stressor, and multiphase multilevel models were used to examine whether PTG transpired in life satisfaction, gratitude, compassion, generativity, meaning-making, and religiosity/spirituality. On average, life satisfaction, generativity, and meaning-making declined following adversity; substantial between-person differences were observed across all outcomes. Our multidimensional approach revealed that, on average, individuals experienced PTG in less than one outcome. More anticipated support and less interpersonal strain were consistently associated with positive functioning in each outcome. Our discussion focuses on how multidimensional approaches to studying PTG promise to disentangle which outcomes potentially grow following adversity and illuminate best research practices for examining PTG, laying the groundwork for future research.

Motivation and Healthy Aging: A Heuristic Model

Building on the seminal definition of "healthy aging" by the World Health Organization (WHO, 2015; 2020), we present a model of motivation and healthy aging that is aimed at identifying the central psychological constructs and processes for understanding what older persons value, and how they can attain and maintain these valued aspects of their lives. This model places goals at its center, and then proceeds from motivational processes of goal setting, pursuit, and disengagement, to contextual factors (cultural, social, technological, physical, organizational, and life-history related aspects) that provide opportunities and constraints to the healthy aging of individuals. We briefly introduce each of these constructs and processes, thereby setting the scene for the articles included in this supplement that each address one or more of the facets of the heuristic model of motivation and healthy aging.

Cross-Lagged Modeling of Cognition and Social Network Size in the Sydney Memory and Ageing Study

Objectives

This study assessed whether reciprocal relationships exist between cognitive function and the social network size of older adults, controlling for age, sex, education, medical conditions, and depressive symptoms.

Methods

Data were collected at biennial follow-ups over 6 years in the Sydney Memory and Ageing Study, a longitudinal cohort study including 1,037 community-based Sydney residents aged 70–90 years without dementia at baseline. We used random intercept cross-lagged panel models to investigate reciprocal associations between social network size and scores in each of 7 cognitive domains including a global score.

Results

Standardized models indicated that within-person deviation in expected language score predicted deviation in expected network size. Within-person deviation in prior expected social network size predicted deviation in expected executive function at year 6. Cross-lagged effects in models of both global cognition and memory, respectively, could not be attributed solely to within-person change.

Discussion

Findings support a co-constitutive view of cognitive function and social relationships in older age. Although both cognition and network size declined over time, slower than expected decline in language ability predicted less than expected contraction in social networks. A similar influence of network size on executive functioning indicated that relationships with friends and family outside of the home contributed significantly to the maintenance of higher order cognitive abilities in older late life. Diverse patterns of influence between cognitive domains and social network size over 6 years underscore the importance of assessing the complex and nuanced interplay between brain health and social relationships in older age.

Friends, family, and romantic partners: Three critical relationships in older women's lives

How are different social relationships jointly and uniquely associated with older women's health and well-being, and what is the directionality of these associations? We address these questions using longitudinal data from the Midlife in the United States study. We find that relationship quality with romantic partners, family, and friends is positively linked with better health and well-being concurrently and longitudinally. Cross-lagged analyses indicate that romantic relationships are more predictive of than predicted by health and well-being, family relationships are more predicted by than predictive of health and well-being, and friendships are both predicted by and predictive of health and well-being.

Shifting sociality during primate ageing

Humans exhibit major age-related shifts in social relationships along with changes in social and emotional psychological processes that underpin these behavioural shifts. Does social ageing in non-human primates follow similar patterns, and if so, what are the ultimate evolutionary consequences of these social shifts? Here we synthesize empirical evidence for shifts in social behaviour and underlying psychological processes across species. Focusing on three elements of social behaviour and cognition that are important for humans-propensities to engage with others, the positive versus negative valence of these interactions, and capabilities to influence others, we find evidence for wide variation in the trajectories of these characteristics across primates. Based on this, we identify potential modulators of the primate social ageing process, including social organization, sex and dominance status. Finally, we discuss how comparative research can contextualize human social ageing. This article is part of the theme issue 'Evolution of the primate ageing process'.

The distance to death perceptions of older adults explain why they age in place: A theoretical examination

Older persons prefer to age in place or stay put in their current dwellings and move less frequently than any other age group. However, current residential mobility theories do not fully account for these preferences and behaviors because they focus on why older people move rather than on why they remain in their dwellings and do not consider the temporal or human developmental context of these residential decisions. It is essential to understand why older persons are reluctant to move because their ability to age successfully-have healthy, independent, active, and enjoyable lives-depends on where they live. When they stay put, they also rely more on family caregivers and paid home care providers to maintain their independence, rather than on the supportive services offered by senior group facilities, such as assisted living. They demand more home modification and financial service products, and their residential decisions influence the supply of housing that younger populations can potentially buy or rent. This paper's theoretical analysis proposes that Carstensen's socioemotional selectivity theory (SST), a lifespan theory of motivation, improves our understanding of why older persons age in place-either in their dwellings or more broadly in their communities. It offers an alternative interpretation of how life-changing events, such as retirement, lower incomes, spousal death, physical limitations, and health declines, influence their residential decisions. Whereas residential mobility theories view these transitions as disruptions that change the appropriateness or congruence of where older people live, SST proposes that older persons perceive these events as signs or cues that they are closer to death and must differently prioritize their goals and emotional experiences. Feeling their time is "running out," older persons are motivated to stay put because moving requires preparations that are physically and emotionally trying and they are able to adapt to their current housing shortcomings. Their residential environments are now also a source of difficult-to-replace positive emotions and provide them with a supportive network of intimate and reliable interpersonal relationships. It is challenging for them to learn how to safely and efficiently conduct their usual activities and routines in another location and to establish new residential attachments and social connections. They would benefit from any net positive emotional payoffs only in a distant future, an unattractive prospect when they perceive a limited time left to live. Empirical studies must test the theoretical propositions presented in this paper. However, the disproportionally large projected future growth of the age 75 and older population with a heightened awareness of their limited time left to live should be a strong rationale for such investigations.