COVID-19 Pandemic-Related Stress and Subjective Well-Being Across Age: The Mediating Role of Social Resources

Stress associated with the COVID-19 pandemic and the measures implemented to prevent its spread dramatically shifted our social networks, interactions, and contexts, all of which influence the assessment of one's subjective well-being (SWB). Drawing on data collected from 1,318 adults between April and May 2020, we used structural equation modeling to analyze the relationship between pandemic-related stress and SWB (life satisfaction, positive affect, negative affect), and examined how these relationships vary across age. Pandemic-related stress was associated with lower life satisfaction and higher negative affect. However, no evidence of age moderation emerged. Subsequent analysis examined different aspects of social resources as potential mediating variables. Loneliness fully mediated the relationship between stress and life satisfaction, while social support demonstrated evidence of partial mediation. Further, loneliness and social support partially mediated the relationship between stress and negative affect. Findings suggest that pandemic-related stress impacts SWB, and social resources help explain these impacts.

Which variables moderate the relationship between depressive symptoms and global neurocognition across adulthood?

The current study examined moderators of the relationship between depressive symptoms and global neurocognition in a large non-clinical community-dwelling sample spanning adulthood. Participants comprised 5,430 individuals between the ages of 18-99 years drawn from the Virginia Cognitive Aging Project. Depressive symptoms were measured via the Center for Epidemiologic Studies-Depression scale and neurocognition was operationalized as a composite variable comprising episodic memory, spatial visualization, processing speed, and reasoning tasks. Moderator variables included physical activity, cognitive activity, education, emotional stability, and openness. Hierarchical regressions were used to examine the influence of depressive symptoms and the moderators on neurocognition. Depressive symptoms significantly predicted neurocognition. Cognitive activity, years of education, and emotional stability moderated the depression-neurocognition relationship by buffering the impact of depressive symptoms on neurocognition. Cognitive activity engagement and level of education may function as a protective influence on those with higher levels of depressive symptoms, while emotional stability may be protective for individuals with lower levels of depressive symptoms. No differences in moderation were found across three age groups representing younger, middle, and older adults. Post-hoc analyses showed years of education and openness as moderators in a subsample excluding individuals with potentially clinically meaningful levels of depressive symptoms.

The temporal relationship between depressive symptoms and self-rated health across adulthood

Objective: Depressive symptoms have been found to relate to diminished self-rated health (SRH), which is a reliable index of general health. Despite such associations, there is limited research examining the bidirectional temporal relationship between these variables. The current study is the first to investigate the longitudinal relationship between depressive symptoms and SRH utilizing a cross-lagged panel analysis in a sample that spans adulthood (ages 18-93).Method: Data from the Virginia Cognitive Aging Project were used to examine the temporal relationship between depressive symptoms and SRH in a cross-lagged panel analysis using structural equation modeling.Results: A bidirectional temporal relationship, which was not moderated by age, was established between depressive symptoms and SRH.Conclusion: This article is the first to demonstrate that depressive symptoms and SRH influence each other reciprocally over time across adulthood, even after controlling for relevant variables. Considering the ubiquity and ramifications of depressive symptoms among American adults, these results highlight the importance of investigating mechanisms that could elucidate the link between the variables in question.

Mediators of the Relationship Between Adverse Childhood Experiences (ACEs) and Symptoms of Anxiety, Depression, and Suicidality among Adults

Adverse childhood experiences (ACEs) are consistently found to be negatively associated with physical, psychological, and psychosocial well-being throughout the lifespan. While previous research has established risk factors and noxious outcomes arising post-ACEs, less attention has been given to factors such as resilience, perceived social support, and subjective well-being that may help explain the relationship between ACEs and psychopathology. Hence, the objectives of this study are to examine: (1) the relationships among ACEs and symptoms of anxiety, depression, and suicidality in adulthood, and (2) whether resilience, social support, and subjective well-being mediate the relationship between ACEs and psychopathological symptoms. Cross-sectional data on ACEs, psychological factors, potential mediating variables, and sociodemographic factors were collected from a community sample of adults aged 18-81 (N = 296) via an on-line survey. Endorsing ACEs was significantly and positively correlated with symptoms of anxiety, depression, and suicidality. Results of parallel mediation analyses showed that social support, negative affect, and life satisfaction statistically mediated the relationships between ACEs and psychopathological outcomes in adulthood. These results highlight the importance of identifying potential mediators of the ACEs-psychopathological symptoms relationship to aid in the development of screening and intervention practices that could bolster developmental outcomes following traumatic childhood experiences.

Staying in the loop: Quality of family-paid caregiver communication and influences on resident mental health in long-term care

BACKGROUND

Considerable research has examined communication dynamics among family members and staff in nursing homes (NHs) and has demonstrated that better communication is associated with more optimal mental health outcomes in both family caregivers and paid caregivers. However, the literature on how communication dynamics influence mental health in long-term care residents is limited and it has yet to be determined how communication impacts residents across care contexts, such as assisted living facilities (ALFs). The purpose of this study is to examine family caregivers' perceptions of communication with paid caregivers and its influence on long-term care resident outcomes and to compare how results differ across care settings (NHs vs. ALFs).

METHODS

Data were drawn from a subsample of the National Health and Aging Trends Study (NHATS) and the National Study on Caregiving (NSOC). The sample consisted of 142 NHATS participants residing in long-term care (n = 93 ALF residents; n = 49 NH residents) with an eligible family caregiver who participated in the NSOC. Family caregivers' perceived quality of communication was assessed via questions regarding the frequency, availability, and helpfulness of communication with paid caregivers. Resident mental health was assessed via measures of positive and negative affect, depressive symptoms, and anxiety.

RESULTS

Across the total sample, greater availability of communication between paid and family caregivers was associated with lower depressive symptoms and negative affect in residents. When examining how these relationships varied across care settings, communication was a stronger predictor of fewer depressive symptoms among residents in ALF settings.

CONCLUSIONS

Study findings provide insights into how interpersonal dynamics between family and paid caregivers influence resident mental health and underscore the importance of enhanced communication among all members of the primary care team, that is, paid caregivers, residents, and their family members.

The Relationship Between Social Support and Subjective Cognitive Functioning Across Adulthood

Subjective cognitive functioning (SCF) is the self-appraisal of one's objective cognition, including both perceived cognitive ability and perceived cognitive impairment. Research has demonstrated perceived subjective cognitive impairment to be an important precursor to objective cognitive declines associated with increased age. Although previous work has shown a consistent positive relationship between social support and objective cognition throughout adulthood, few studies have examined the relationship between social support and SCF. Participants (N  =  1,877; age range: 18-99) from the Virginia Cognitive Aging Project completed assessments of multiple domains of SCF and social support. Results demonstrated a significant association between negative support interactions and poorer SCF, beyond the influence of sociodemographic, well-being, and health factors. Exploratory analyses indicated that the magnitude of the relationships between social support and SCF were generally the same across age. These findings suggest that negative interactions may adversely impact an individual's self-appraisals of cognition.

Testing the Reserve Capacity Model: Does Race Moderate the Relationship Between Negative Emotions and Neurocognition?

OBJECTIVE

To test whether race moderates the relationship between negative emotions and neurocognition by applying the reserve capacity model within a large sample that spans adulthood.

METHOD

The study sample (N = 1,020) consisted of community-dwelling adults between 18 and 84 years of age who were drawn from the Virginia Cognitive Aging Project. Demographic variables were used to match a sample of Black participants to a sample of White participants. Race was examined as a moderator of the relationship between negative emotions (i.e., depressive symptoms, trait anxiety, and the negative affect subscale from the Positive and Negative Affect Schedule) and neurocognitive variables (episodic memory, reasoning, spatial visualization, and processing speed) with multiple-group structural equation modeling.

RESULTS

After accounting for sociodemographic variables, depressive symptoms were negatively associated with processing speed in both groups, and with worse reasoning in the White subsample. Negative affect was associated with lower reasoning performance in both groups and with lower spatial visualization in the White subsample. Trait anxiety was not significantly associated with the neurocognitive constructs in either group. Multigroup structural equation models showed that the magnitudes of the associations were not different between the Black and White subsamples. Thus, race did not moderate the relationships between depressive symptoms, trait anxiety, and negative affect with neurocognition.

CONCLUSIONS

Negative emotions are associated with lower performance on different neurocognitive tasks, but race does not moderate these relationships. Future research should examine perceived discrimination or other psychosocial variables when examining the relationships among negative emotions and neurocognition.

Does Neurocognition Predict Subjective Well-Being?

Greater subjective well-being (SWB) is associated with a myriad of positive outcomes across adulthood. While several studies have demonstrated a relationship between cognition and SWB, the current study extends previous work by examining the relationship between neurocognition and SWB across age and time. Data were drawn from 3,856 individuals between the ages of 18-99 years who participated in the Virginia Cognitive Aging Project, a prospective study of cognition in community dwelling adults. Participants completed a battery of neurocognitive tasks (assessing spatial visualization, episodic memory, reasoning, processing speed, and vocabulary) and measures assessing SWB (life satisfaction, positive affect, and negative affect). Results indicated that spatial visualization, episodic memory, and processing speed predicted life satisfaction only in specific age groups, but the magnitude of the coefficients were not significantly different between the groups, providing limited evidence of age moderation. Vocabulary was negatively associated with positive affect for all age groups. The temporal relationships between neurocognition and SWB were generally non-significant, and age did not moderate this relationship. Within the broader context of neurocognition, this study provides evidence that the relationship between neurocognition and SWB cross-sectionally may be partially age dependent for one facet of SWB, and the temporal relationship may be minimal.

Use of Home Care Services Reduces Care-Related Strain in Long-Distance Caregivers

BACKGROUND AND OBJECTIVES

Prior work examining the role of older adult home care service use in alleviating strain in family caregivers has resulted in contradictory findings. However, prior research has been entirely limited to caregivers who live within close geographical proximity to their care recipients. Long-distance caregivers are a unique caregiving subgroup that has remained understudied. Guided by the stress process model, this study examined if the association between primary caregiving stressors (the care recipient's functional and cognitive status) and secondary stressors (perceived role strains related to work and to other family responsibilities) in long-distance caregivers was mediated by the care recipient's utilization of home care services.

RESEARCH DESIGN AND METHODS

The sample included 166 long-distance caregivers in the United States who provide and manage care to a community-dwelling care recipient living 2 or more hours away. Participants reported on their care recipient's cognitive and functional status, perceived interference of caregiving with work and other family responsibilities, and the care recipient's use of home care services.

RESULTS

Path analyses show that home care use by the care recipient fully mediated the association between care recipients' functional impairment and caregiver strains (work and family). Furthermore, home care use partially mediated the effects of care recipients' cognitive impairment on caregiver strains.

DISCUSSION AND IMPLICATIONS

Results indicate that the care recipient's home care service utilization may serve as a protective factor against care-related strain in long-distance caregivers. These findings can be used to inform intervention efforts focused on a family-centered care approach that can be specifically tailored to long-distance caregivers.

Differences in cognitive performance between informal caregivers and non-caregivers

Extensive literature exists documenting the relationship between stress and cognition. Caregiving for an individual with Alzheimer's disease can be aunique and chronic stress experience due to the increasing dependency of the care-recipient as the disease progresses. The current study examines the relationship between stress and cognitive performance in 47 dementia caregivers compared to 47 noncaregiver control participants matched on age, gender, and education. Participants completed measures assessing stress (measured via the Perceived Stress Scale) and seven domains of cognition including episodic memory, working memory, executive functioning, attention, visuospatial processing, processing speed, and implicit memory. Results showed that caregivers had poorer performance than non-caregivers on certain measures of episodic memory, working memory, and executive functioning; while no significant differences were observed on measures of attention, visuospatial processing, processing speed, or implicit memory. In addition, when controlling for general stress, caregiver performance on measures of processing speed and visuospatial processing was also poorer than non-caregivers. By controlling for levels of general stress that may not be related to caregiving, these results show that differences in cognitive performance are unlikely to be explained by general stress alone.

The COVID-19 Pandemic and Psychosocial Outcomes Across Age Through the Stress and Coping Framework

Background and Objectives

The emergence of the Coronavirus Disease 2019 (COVID-19) and the measures implemented to curb its spread may have deleterious effects on mental health. Older adults may be at increased risk for adverse psychosocial outcomes because opportunities to remain socially connected have diminished. Research is needed to better understand the impact of pandemic-related stress on mental health. The purpose of this study is 3-fold: (a) to examine the influences of COVID-19 pandemic-related stress on depression, anxiety, and loneliness; (b) to assess the mediating role of coping style and social support; and (c) to investigate whether these relationships vary across age.

Research Design and Methods

Participants (N = 1,318) aged 18–92 years completed an online survey assessing pandemic-related stress, mental health, social support, coping, and their experiences with social distancing, during the initial implementation of social distancing measures in the United States.

Results

Social support and coping style were found to relate to psychosocial outcomes. Avoidant coping was the strongest mediator of the relationship between pandemic-related stress and psychosocial outcomes, particularly depression. Avoidant coping more strongly mediated the relationship between stress and depression in younger adults compared to older adults.

Discussion and Implications

Results were consistent with the stress and coping framework and recent work highlighting older adults’ resilience during the COVID-19 pandemic. Findings highlight the associations between positive coping behaviors and psychosocial well-being and indicate that older adults may use unique adaptive mechanisms to preserve well-being during the COVID-19 pandemic.

Measurement Invariance and Developmental Trajectories of Multidimensional Self-Perceptions of Aging in Middle-Aged and Older Adults

OBJECTIVES

This study examined the measurement invariance and longitudinal trajectories of multidimensional self-perceptions of aging (SPA) and factors that predict between-person variability in the level and change of SPA in middle-aged and older adults.

METHOD

Data were drawn from the German Ageing Survey spanning four waves, covering a 15-year period. Multidimensional SPA was assessed with the Personal Experience of Aging Scale, consisting of three dimensions, physical decline, social loss, and continuous growth.

RESULTS

The measurement invariance models across age groups (middle-aged versus older adults) and across time showed a good fit after allowing one item to vary at metric and/or scalar levels. Growth curve models showed only minor declining trajectories in two of the three dimensions of SPA, social loss and continuous growth dimensions, toward more negative views. Participants with poor resources in general were more likely to have negative SPA across all three dimensions. The protective effect of having a spouse was observed on only the social dimension of SPA, supporting a domain-specific effect of having a spouse.

DISCUSSION

The study demonstrates the usefulness of a multidimensional understanding of SPA and recognizes the need for identifying different factors that may promote positive perceptions on aging in different dimensions of life.

Investigating the Relations Among Different Measures of False Memory

Researchers have used the term false memory to describe various memory errors, including the incorporation of erroneous information into a memory, misremembering a word presented as a picture, and the construction of a detailed memory of an event that did not occur. Whether such diverse manifestations of false memory are assessing the same construct has not been evaluated. The purpose of this study is to examine the relations among a set of variables that have been used in the literature to measure false memory. The sample consisted of 112 college students who completed four false memory measures, including the commonly used Deese-Roediger-McDermott (DRM) and the misinformation tasks. Zero-order correlations indicated that there are little to no associations between false memories in the DRM and the misinformation tasks, as well as the other false memory tasks. A confirmatory factor analysis of the DRM and misinformation variables further suggested that the false memory variables share little variance in common and may not be represented by a unitary factor. Thus, the results of the current study suggest that tasks intended to measure false memory may be measuring different types of memory errors. 

Do depressive symptoms and subjective well-being influence the valence or visual perspective of autobiographical memories in young adults?

The present study examines predictors of autobiographical memory valence and visual perspective. Participants (N = 144) between the ages of 18-35 years completed an online survey assessing depressive symptoms, and different aspects of subjective well-being (i.e., life satisfaction, positive affect, and negative affect). Participants retrieved six autobiographical memories cued via positive, negative, and neutral words and completed a questionnaire assessing characteristics of the memories, including memory valence and visual perspective. Using structural equation modelling, we found that the valence of neutral cued memories were significantly negatively associated with depressive symptoms and negative affect, and significantly positively associated with life satisfaction, even after controlling for current mood. Depressive symptoms were generally not significantly related to visual perspective. These results support previous findings that depressive symptoms and well-being are related to differences in memory characteristics but suggest that some of the relationships may be less robust when examined in a non-clinical sample.

Do Feelings and Knowledge About Aging Predict Ageism?

Experiencing ageism has been shown to negatively impact older adults. This study investigated predictors of ageism to examine which are most important in accounting for ageist attitudes. Participants (N = 419) between the ages of 18 and 86 completed an online survey assessing ageism and several predictors of ageism. Higher levels of anxiety about aging, lower levels of knowledge of aging, and less frequent and lower quality of contact with older adults uniquely predicted ageism beyond the influence of demographic and well-being factors. Anxiety about aging fully mediated the relationship between death anxiety and ageism, and the relationship between attitudes toward own aging and ageism. Moderation analyses showed that knowledge of aging buffered the impact of anxiety about aging on ageism such that low knowledge of aging and high anxiety about aging were particularly impactful in predicting ageism in younger adults, as compared with older adults.

EXAMINING THE RELATIONSHIP BETWEEN COGNITIVE FUNCTIONING AND SUBJECTIVE WELL-BEING ACROSS AGE

Higher levels of subjective well-being (SWB) are associated with myriad of positive outcomes, including better physical health. Several variables have been shown to predict SWB, including cognitive functioning. The relationship between aspects of SWB (positive affect, negative affect, and life satisfaction) and cognition were examined in participants (N = 5, 125) between the ages of 18- 99 years from the Virginia Cognitive Aging Project (VCAP). Participants completed a battery of cognitive tasks, including tests of verbal episodic memory, processing speed, reasoning, spatial visualization, and vocabulary. Cross-sectional analyses were conducted using structural equation modeling, using full information maximum likelihood estimation. In the models, the five latent cognitive constructs simultaneously predicted each of the SWB outcome variables separately. Age, education, gender, and self-rated health were included as covariates. Results show that reasoning was a significant unique predictor of negative affect (-.30), vocabulary was a significant unique predictor of positive affect (-.21), and spatial visualization was a significant unique predictor of life satisfaction (.21). Age moderation was examined by dividing the sample into three age groups (younger, middle-aged, and older). There was some evidence of age moderation. Namely, spatial visualization was a significant unique predictor of life satisfaction in the younger sample only. Reasoning and processing speed predicted negative affect in the younger group, whereas only reasoning predicted negative affect in the older group. In conclusion, in a large community-based sample spanning adulthood, there is evidence that cognition predicts aspects of SWB but there is variation across SWB outcome variables, and across age.

INVESTIGATING THE RELATIONSHIP BETWEEN SOCIAL SUPPORT AND COGNITION AS MEDIATED BY HEALTH AND POSITIVE AFFECT

Decreased social networks are common in old age after major life events such as retirement, loss of loved ones, and declining health (Shankar et al., 2013). Diminished social ties are associated with increased feelings of loneliness and perceived isolation, which can have negative effects on cognition and physical health. The current study examines the relationship between social support (assessed via the Social Network Questionnaire) and overall cognitive performance (assessed as a latent construct comprising indicators that represent mean verbal episodic memory, processing speed, reasoning, and spatial visualization), and investigates positive affect and self-rated health as mediators of this relationship. The current study included 5,125 participants between the ages of 18-99 years from the Virginia Cognitive Aging Project (VCAP). Cross-sectional analyses were conducted using structural equation modeling. After controlling for age and education, results showed that a social support construct (comprising indicators representing each social network subscale) significantly and positively predicted cognitive performance (.59, p< .001). This relationship was reduced to .22 (p <.001) when positive affect was included as a mediator, and to .14 (p< .001) when self-rated health was included as a mediator. When the variables were included in a joint mediation model the relationship between social support and cognition was .20 (p < .001). Thus, health and positive affect are partial mediators of the relationship between social support and cognition and may help explain the relationship between social support and cognition. Furthermore, these findings provide additional evidence that social networks may play an important role in successful aging.

INVESTIGATING MODERATORS OF THE RELATIONSHIP BETWEEN SUBJECTIVE AND OBJECTIVE MEMORY

Subjective memory complaints (SMC) among older adults have been explored as an indicator of decline in objective memory functioning. While some research has found that SMC may be predictive of future cognitive impairment and dementia (Glodzik-Sobanska et al., 2007; Wang et al., 2004), others have suggested that SMC are common among healthy older adults (Cooper et al., 2011) and are not strongly related to objective memory performance. Researchers suggest that SMC may be more strongly related to affective factors (e.g., depression and anxiety; Rowell, Green, Teachman, & Salthouse, 2015). The current study examined the relationship between SMC, objective episodic memory performance (OEMP), along with depression and anxiety in a sample of 18-99 year olds (N = 5,430) from the Virginia Cognitive Aging Project (VCAP). Structural equation modeling with full information maximum likelihood estimation was used to investigate whether clinically-relevant depression and anxiety levels moderated the relationship between SMC and OEMP, controlling for age, education, gender, and health. OEMP was represented as a latent construct while the remaining variables were observed. Although depression and anxiety are significantly related to SMC (r’s = .29, .17, respectively), they are not correlated with OEMP. Furthermore, depression, but not anxiety, moderated the relationship between SMC and OEMP, such that those at risk for depression had a stronger relationship between SMC and OEMP (-.07, p<.05) compared to those not at risk (-.02, p=.31). This suggests that SMC may not be a valid indicator of OEMP as it may reflect variance from other sources, such as depression.

Examining Gender Differences in Neurocognitive Functioning Across Adulthood

OBJECTIVE

Previous research has shown that women have an advantage on verbal episodic memory and processing speed tasks, while men show an advantage on spatial ability measures. Previous work has also found differences in cognition across age. The current study examines gender differences in neurocognitive functioning across adulthood, whether age moderates this effect, and whether these differences remain consistent with practice across multiple testing sessions.

METHOD

Data from the Virginia Cognitive Aging Project were used, which included participants between the ages of 18 and 99 years (N = 5125). Participants completed measures assessing five cognitive domains: episodic memory, processing speed, reasoning, spatial visualization, and vocabulary.

RESULTS

Results showed that gender was significantly related to memory, speed, and spatial visualization, but not to vocabulary or reasoning. Results of invariance analyses across men and women provided evidence of configural and metric invariance, along with partial scalar invariance. Additionally, there was little evidence that age or practice influenced the gender effect on neurocognition.

CONCLUSIONS

Consistent with the previous research, these results suggest that there is a female advantage in episodic memory and processing speed, and a male advantage in spatial visualization. Gender was shown to influence cognition similarly across adulthood. Furthermore, the influence of gender remained the same across three sessions, which is consistent with the previous work that has shown that training does not differentially impact performance on spatial ability measures for females compared to males.

Examining processing speed as a predictor of subjective well-being across age and time in the German Aging Survey

The purpose of the current study was to examine the associations between cognition, measured via the Digit Symbol Substitution Task, and subjective well-being (measured using the Satisfaction with Life Scale and the Positive and Negative Affect scale) in a community-based sample of middle-aged and older adults. Specifically, we examined both the cross-sectional and the longitudinal relationships between processing speed and subjective well-being. Data are from participants between 40-85 years-old (at baseline) who participated in the German Aging Survey across four waves. Results showed that processing speed was a weak but consistent predictor of positive affect, while age was associated with decreases in negative affect and positive affect, and increases in life satisfaction cross-sectionally. Conversely, cross-lagged panel analyses showed that the temporal relationship between processing speed and positive affect was close to zero, and non-significant. The results of this study shed additional light on the relationship between subjective well-being and cognition.

Physical Health Mediates the Relationship between Psychological Well-Being and Engagement in Exercise across Age in a German Sample

The prevalence of chronic illness among middle-aged and older adults is increasing worldwide as the population continues to age. One way to prevent the continued increase and subsequent negative outcomes of chronic illness is to increase the number of individuals who engage in exercise. Thus, it is important to examine which factors predict engagement in exercise in middle-aged and older adults. As a result, the current study examined the relationship between physical health, psychological well-being, and engagement in exercise in a sample of middle-aged and older German adults. We found that increased age was associated with less frequent engagement in exercise. We also found that physical health mediated the relationship between psychological well-being and engagement in exercise. Finally, we found that age did not moderate the relationship between subjective well-being and engagement in exercise, suggesting that the role of physical health as a mediator was similar in older adults compared to middle-aged adults. These findings have important implications for interventions seeking to promote exercise among adults.

Leisure Activity Engagement and Positive Affect Partially Mediate the Relationship Between Positive Views on Aging and Physical Health

Objectives.

To examine leisure activity engagement and positive affect as potential mediators for the relationships between positive views on aging (PVA) and two health outcomes: subjective health and physical limitations.

Method.

Data from 5,194 participants from the German Ageing Survey (aged 40-91 years) were used to examine relationships between PVA to subjective health (assessed by self-rated health and perceived health change from past) and physical limitations (assessed via self-reported limitations on 10 activities). Leisure activity engagement and positive affect were examined as potential mediators in latent variable path analyses. Age moderation among these relationships was also examined.

Results.

Leisure activity engagement and positive affect separately and jointly served to partially mediate the relationships between PVA and the health outcomes. When entered as joint mediators, positive affect no longer significantly predicted physical limitations, indicating a shared variance with leisure activity engagement. Age moderated the relationship between PVA and physical limitations; the relationship was stronger among older adults than among middle-aged adults.

Discussion.

Leisure activity engagement and positive affect were shown to help explain the relationship between PVA and health, but differently for different health constructs and also among middle-aged and older adults. Findings provide further insight into ways in which PVA influence health.

Spatial Visualization Ability Mediates the Male Advantage in Spatial and Visual Episodic Memory

Abstract. Individuals between the ages of 18 and 94 (N = 326) completed a battery of episodic memory tasks, as well as several measures of spatial visualization. A female advantage in verbal episodic memory and a male advantage in spatial and visual episodic memory were observed. Mediation analyses provided evidence that performance on spatial visualization tasks greatly influences the magnitude of the effect for sex differences among the different episodic memory constructs. In particular, the spatial visualization construct fully mediated the relationship between sex and episodic spatial memory performance. Further, when spatial visualization was included as a mediator in the model the relationship between sex and episodic verbal memory increased, and the relationship between sex and episodic visual memory reversed, such that women scored higher than men.

Examining the Positivity Effect in Autobiographical Memory Across Adulthood

The positivity effect in memory is characterized by enhanced memory for emotionally positive information or decreased memory for emotionally negative information with increased age. The goals of the current study were to (a) examine the positivity effect in autobiographical memory using instructions that limited experimental constraints, (b) examine the relationship between memory valence and subjective well-being, and (c) examine the relationship between age and other memory characteristics across adulthood. In the current study, 281 individuals between the ages of 18 and 94 (Mage=53.14, SD=17.04) completed a modified Memory Experiences Questionnaire using online survey methods. Participants answered questions about emotional valence and other phenomenological characteristics regarding two memories, including any specific memory of their choosing and a personally meaningful memory. Results indicated that memory valence was unrelated to age, thus failing to provide evidence for the positivity effect. However, memory valence was found to be a significant predictor of life satisfaction. Age moderated the relationship between memory valence and subjective well-being but did so differently across the two memories. Age was also associated with increased vividness, coherence, sensory detail, time clarity, and a first-person perspective for the personally meaningful memory.

The Relationship Between Social Support and Subjective Well-Being Across Age

The relationships among types of social support and different facets of subjective well-being (i.e., life satisfaction, positive affect, and negative affect) were examined in a sample of 1,111 individuals between the ages of 18 and 95. Using structural equation modeling we found that life satisfaction was predicted by enacted and perceived support, positive affect was predicted by family embeddedness and provided support, and negative affect was predicted by perceived support. When personality variables were included in a subsequent model, the influence of the social support variables were generally reduced. Invariance analyses conducted across age groups indicated that there were no substantial differences in predictors of the different types of subjective well-being across age.

Visual perspective in autobiographical memories: reliability, consistency, and relationship to objective memory performance

Visual perspective in autobiographical memories was examined in terms of reliability, consistency, and relationship to objective memory performance in a sample of 99 individuals. Autobiographical memories may be recalled from two visual perspectives--a field perspective in which individuals experience the memory through their own eyes, or an observer perspective in which individuals experience the memory from the viewpoint of an observer in which they can see themselves. Participants recalled nine word-cued memories that differed in emotional valence (positive, negative and neutral) and rated their memories on 18 scales. Results indicate that visual perspective was the most reliable memory characteristic overall and is consistently related to emotional intensity at the time of recall and amount of emotion experienced during the memory. Visual perspective is unrelated to memory for words, stories, abstract line drawings or faces.

Quantifying cognitive reserve in older adults by decomposing episodic memory variance: replication and extension

The theory of cognitive reserve attempts to explain why some individuals are more resilient to age-related brain pathology. Efforts to explore reserve have been hindered by measurement difficulties. Reed et al. (2010) proposed quantifying reserve as residual variance in episodic memory performance that remains after accounting for demographic factors and brain pathology (whole brain, hippocampal, and white matter hyperintensity volumes). This residual variance represents the discrepancy between an individual’s predicted and actual memory performance. The goals of the present study were to extend these methods to a larger, community-based sample and to investigate whether the residual reserve variable is explained by age, predicts longitudinal changes in language, and predicts dementia conversion independent of age. Results support this operational measure of reserve. The residual reserve variable was associated with higher reading ability, lower likelihood of meeting criteria for mild cognitive impairment, lower odds of dementia conversion in dependent of age, and less decline in language abilities over 3 years. Finally, the residual reserve variable moderated the negative impact of memory variance explained by brain pathology on language decline. This method has the potential to facilitate research on the mechanisms of cognitive reserve and the efficacy of interventions designed to impart reserve.

Using contextual analyses to examine the meaning of neuropsychological variables across samples of english-speaking and spanish-speaking older adults

The meanings of several target neuropsychological variables, including measures of executive functioning, were examined using contextual analysis across a sample of English-speakers and a sample of Spanish-speakers. Results of the contextual analysis, which examined the contributions of the latent constructs of memory, psychomotor speed, visual spatial ability, and knowledge and comprehension, to the target neuropsychological variables indicate that each of the target variables likely reflects the unique contribution of several reference abilities. These findings provide evidence that the neuropsychological variables are multi-dimensional. The patterns of relations were similar across the samples of English and Spanish speakers.

Testing the white matter retrogenesis hypothesis of cognitive aging

The retrogenesis hypothesis postulates that late-myelinated white matter fibers are most vulnerable to age- and disease-related degeneration, which in turn mediate cognitive decline. While recent evidence supports this hypothesis in the context of Alzheimer's disease, it has not been tested systematically in normal cognitive aging. In the current study, we examined the retrogenesis hypothesis in a group (n = 282) of cognitively normal individuals, ranging in age from 7 to 87 years, from the Brain Resource International Database. Participants were evaluated with a comprehensive neuropsychological battery and were imaged with diffusion tensor imaging. Fractional anisotropy (FA), radial diffusivity (RD), and axial diffusivity (DA), measures of white matter coherence, were computed in 2 prototypical early-myelinated fiber tracts (posterior limb of the internal capsule, cerebral peduncles) and 2 prototypical late-myelinated fiber tracts (superior longitudinal fasciculus, inferior longitudinal fasciculus) chosen to parallel previous studies; mean summary values were also computed for other early- and late-myelinated fiber tracts. We examined age-associated differences in FA, RD, and DA in the developmental trajectory (ages 7-30 years) and degenerative trajectory (ages 31-87 years), and tested whether the measures of white matter coherence mediated age-related cognitive decline in the older group. FA and DA values were greater for early-myelinated fibers than for late-myelinated fibers, and RD values were lower for early-myelinated than late-myelinated fibers. There were age-associated differences in FA, RD, and DA across early- and late-myelinated fiber tracts in the younger group, but the magnitude of differences did not vary as a function of early or late myelinating status. FA and RD in most fiber tracts showed reliable age-associated differences in the older age group, but the magnitudes were greatest for the late-myelinated tract summary measure, inferior longitudinal fasciculus (late fiber tract), and cerebral peduncles (early fiber tract). Finally, FA in the inferior longitudinal fasciculus and cerebral peduncles and RD in the cerebral peduncles mediated age-associated differences in an executive functioning factor. Taken together, the findings highlight the importance of white matter coherence in cognitive aging and provide some, but not complete, support for the white matter retrogenesis hypothesis in normal cognitive aging.

Do neuropsychological tests have the same meaning in Spanish speakers as they do in English speakers?

OBJECTIVE

The purpose of this study was to examine whether neuropsychological tests translated into Spanish measure the same cognitive constructs as the original English versions.

METHOD

Older adult participants (N = 2,664), who did not exhibit dementia from the Washington Heights Inwood Columbia Aging Project (WHICAP), a community-based cohort from northern Manhattan, were evaluated with a comprehensive neuropsychological battery. The study cohort includes both English (n = 1,800) and Spanish speakers (n = 864) evaluated in their language of preference. Invariance analyses were conducted across language groups on a structural equation model comprising four neuropsychological factors (memory, language, visual-spatial ability, and processing speed).

RESULTS

The results of the analyses indicated that the four-factor model exhibited partial measurement invariance, demonstrated by invariant factor structure and factor loadings but nonequivalent observed score intercepts.

CONCLUSION

The finding of invariant factor structure and factor loadings provides empirical evidence to support the implicit assumption that scores on neuropsychological tests are measuring equivalent psychological traits across these two language groups. At the structural level, the model exhibited invariant factor variances and covariances.

White matter hyperintensities and cognition: testing the reserve hypothesis

OBJECTIVE

White matter hyperintensities (WMH), visualized on T2-weighted MRI, are thought to reflect small-vessel vascular disease. Much like other markers of brain disease, the association between WMH and cognition is imperfect. The concept of reserve may account for this imperfect relationship. The purpose of this study was to test the reserve hypothesis in the association between WMH severity and cognition. We hypothesized that individuals with higher amounts of reserve would be able to tolerate greater amounts of pathology than those with lower reserve.

METHODS

Neurologically healthy older adults (n=717) from a community-based study received structural MRI, neuropsychological assessment, and evaluation of reserve. WMH volume was quantified algorithmically. We derived latent constructs representing four neuropsychological domains, a measure of cognitive reserve, and a measure of brain reserve. Measures of cognitive and brain reserve consisted of psychosocial (e.g., education) and anthropometric (e.g., craniometry) variables, respectively.

RESULTS

Increased WMH volume was associated with poorer cognition and higher cognitive and brain reserve were associated with better cognition. Controlling for speed/executive function or for language function, those with higher estimates of cognitive reserve had significantly greater degrees of WMH volume, particularly among women. Controlling for cognitive functioning across all domains, individuals with higher estimates of brain reserve had significantly greater WMH volume.

CONCLUSIONS

For any given level of cognitive function, those with higher reserve had more pathology in the form of WMH, suggesting that they are better able to cope with pathology than those with lower reserve. Both brain reserve and cognitive reserve appear to mitigate the impact of pathology on cognition.

Comparison of patient and caregiver reports of patient activity participation and its relationship to mental health in patients with Alzheimer's disease

The relationship between engagement in pleasant activities as rated by the patient and as rated by the caregiver from the patient's perspective was examined using structural equation modeling in a sample of patients (N = 277) diagnosed with mild to moderate Alzheimer's disease. The two activity participation ratings were only moderately related to one another. Furthermore, depression was the only significant predictor of the patient-rated activity participation, whereas severity of depression, degree of personality change, level of dependence, and cognition were all significant predictors of caregiver-rated activity participation. These findings suggest that caregivers consider a wider range of variables when evaluating the patient's engagement in activities than does the patient. Predictors of patient-rated activity participation did not differ as a function of age or cognition.

Construct validity of cognitive reserve in a multiethnic cohort: The Northern Manhattan Study

Cognitive reserve is a hypothetical construct that has been used to inform models of cognitive aging and is presumed to be indicative of life experiences that may mitigate the effects of brain pathology. The purpose of this study was to evaluate the construct validity of cognitive reserve by examining both its convergent and its discriminant validity across three different samples of participants using structural equation modeling. The cognitive reserve variables were found to correlate highly with one another (thereby providing evidence of convergent validity), but demanding tests of discriminant validity indicated that, in two of the samples, the cognitive reserve construct was highly related to an executive functioning construct.

Within-person variability in state anxiety across adulthood: Magnitude and associations with between-person characteristics

Across domains of functioning, research has shown substantial within-person variability in a number of different types of variables from one measurement occasion to another. Using data obtained from a large sample (n = 784, 18-97 years) at three separate occasions, we examined properties and correlates of short-term variability in a construct that by definition is prone to fluctuations, namely state anxiety. Our results revealed that participants exhibited sizeable across-occasion variation in state anxiety. The magnitude of variability was unrelated to age, but was associated with a number of individual difference characteristics such as self-reported health, aspects of personality, well-being, and cognition. However, after taking into account mean-level differences in state anxiety, evidence for unique associations of variability was minimal.

Evaluation of prefrontal-hippocampal effective connectivity following 24 hours of estrogen infusion: an FDG-PET study

Although several functional neuroimaging studies have addressed the relevance of hormones to cerebral function, none have evaluated the effects of hormones on network effective connectivity. Since estrogen enhances synaptic connectivity and has been shown to drive activity across neural systems, and because the hippocampus and prefrontal cortex (PFC) are putative targets for the effects of estrogen, we hypothesized that effective connectivity between these regions would be enhanced by an estrogen challenge. In order to test this hypothesis, FDG-PET scans were collected in eleven postmenopausal women at baseline and 24h after a graded estrogen infusion. Subtraction analysis (SA) was conducted to identify sites of increased cerebral glucose uptake (CMRglc) during estrogen infusion. The lateral PFC and hippocampus were a priori sites for activation; SA identified the right superior frontal gyrus (RSFG; MNI coordinates 18, 60, 28) (SPM2, Wellcome Dept. of Cognitive Neurology, London, UK) as a site of increased CMRglc during estrogen infusion relative to baseline. Omnibus covariate analysis conducted relative to the RSFG identified the right hippocampus (MNI coordinates: 32, -32, -6) and right middle frontal gyrus (RMFG; MNI coordinates: 40, 22, 52) as sites of covariance. Path analysis (Amos 5.0 software) revealed that the path coefficient for the RSFG to RHIP path differed from zero only during E2 infusion (p<0.05); moreover, the magnitude of the path coefficient for the RHIP to RMFG path showed a significant further increase during the estrogen infusion condition relative to baseline [Deltachi(2)=4.05, Deltad.f.=1, p=0.044]. These findings are consistent with E2 imparting a stimulatory effect on effective connectivity within prefrontal-hippocampal circuitry. This holds mechanistic significance for resting state network interactions and may hold implications for mood and cognition.

Executive dysfunctions across adulthood: measurement properties and correlates of the DEX self-report questionnaire

Difficulties in executive processes can disturb daily life functioning. Using data obtained from two independent community-dwelling samples (n(1) = 468, n(2) = 669, 18-97 years), we examined the factor structure of the Dysexecutive Functioning Questionnaire (DEX) and explored the frequencies and potential correlates of self-reported executive difficulties. Our results revealed that executive problems are parsimoniously described with one underlying factor. Everyday executive dysfunctions were moderately frequent throughout adulthood. Reports of executive problems were associated with individual difference characteristics including age, subjective health, personality, affect, and cognition. We also found that, although executive functions are known to decline with advancing adult age, younger age groups reported more problems than older groups, an effect that was partially mediated by a negative affect factor. We discuss implications for the validity of the instrument as well as directions for future research on executive functioning difficulties in everyday life.

Exploring the structure of a neuropsychological battery across healthy elders and those with questionable dementia and Alzheimer's disease

An exploratory factor analysis (EFA) and a series of confirmatory factor analyses were conducted on 17 variables designed to assess different cognitive abilities in a sample of healthy older adults. In the EFA, 4 factors emerged corresponding to language, memory, processing speed, and fluid ability constructs. The results of the confirmatory factor analyses suggested that a 5-factor model with an additional Attention factor improved the fit. The invariance of the 5-factor model was examined across 3 groups: a group of cognitively healthy older adults, a group of patients diagnosed with questionable dementia (QD), and a group of patients diagnosed with probable Alzheimer's disease (AD). Results of the invariance analysis suggest that the model may have configural invariance across the 3 groups but not metric invariance. Specifically, preliminary analyses suggest that the memory construct may represent something different in the QD and AD groups as compared to the healthy older adult group, consistent with the underlying pathology in early AD.

Life satisfaction across adulthood: different determinants at different ages?

It is likely that with aging and changing life circumstances, individuals' values shift in systematic ways, and that these shifts may be accompanied by shifts in the determinants of their subjective judgments of well being. To examine this possibility, the relations among the Satisfaction With Life Scale (SWLS) and a number of personality, affect, demographic, and cognitive variables were examined in a sample of 818 participants between the ages of 18 and 94. The results indicated that although many variables had significant zero-order correlations with the SWLS, only a few variables had unique utility in predicting life satisfaction. Invariance analyses indicated that while the qualitative nature of life satisfaction remains constant across adult age, the influence of fluid intelligence on judgments of life satisfaction declines with age. In contrast, negative affect is negatively associated with life satisfaction consistently across the adult age span.

Investigating the structure and age invariance of episodic memory across the adult lifespan

The structure of episodic memory was investigated by assessing different modalities of material (verbal, figural, and spatial) and different types of tests (recall, cued recall, and recognition). A 3-factor model that distinguished among modalities of material was found to be the best representation of memory and the verbal, figural, and spatial memory factors exhibiting construct validity. This 3-factor modality of material model also demonstrated configural, metric, and structural age invariance across a sample of adults (N = 327) between the ages of 18 and 94. There was evidence that latent constructs corresponding to recall, cued recall, and recognition could be distinguished from one another within the verbal domain but not within the figural and spatial domains. A mediation model examining the retrieval constructs was examined within the verbal domain, and there were unique age-related influences on cued recall and recall performance. This result is consistent with findings that increased age is associated with increased difficulty in retrieving information.

Efficiency of route selection as a function of adult age

Two tasks hypothesized to assess the efficiency of route selection were administered to 328 adults ranging from 18 to 93 years of age. Increased age was associated with slower completion of mazes, even after adjusting for differences in perceptual-motor speed, and with longer and less accurate routes in a task in which participants were asked to visit designated exhibits in a zoo. The route selection measures were correlated with measures hypothesized to represent executive functioning, such as the number of categories in the Wisconsin card sorting test and the number of words generated in a category fluency test. However, most of the age-related influences on the measures from the route selection tasks were shared with age-related effects on established cognitive abilities, which implies that the same mechanisms may account for the relations of age on both sets of variables.

Aging and symptoms of anxiety and depression: Structural invariance of the tripartite model

Negative affect measures were evaluated in a cross-sectional community sample of adults aged 18-93 (N = 335) to examine the structure of neuroticism, anxiety, and depressive symptoms in young, middle, and older adult cohorts. Structural equation modeling was used to contrast 3 nested models: a 1-factor general distress model; a 2-factor high negative-low positive affect model; and a 3-factor "tripartite model" reflecting a higher order Negative Affect factor that is common to depression and anxiety problems and 2 lower order factors, Low Positive Affect (mostly specific to depression) and Arousal (specific to anxiety/panic). As expected, the tripartite model fit best for all age groups. Further, multigroup analyses indicated age invariance for the tripartite model, suggesting the model can be effectively applied with older populations.

An individual difference analysis of false recognition

Two studies with moderately large samples of participants were conducted to examine correlates of false recognition. In Experiment 1 false recognition of words was found to be a robust and reliable phenomenon at the level of individuals, and the tendency to classify critical lures as old was more closely related to the correct classification of old items as old than to the incorrect classification of unrelated new items as old. False recognition was not significantly related to any of the cognitive abilities that were assessed, including episodic memory, or to other factors such as personality and chronic mood. In Experiment 2 these findings were extended to include dot pattern and face stimuli. Although measures of veridical memory were significantly correlated across the different types of stimulus material, false recognition rates only had modest and generally not significant correlations, which suggests that the tendency to produce false recognitions may be a task-specific characteristic of individuals.

An individual differences analysis of memory control

Performance on a wide variety of memory tasks can be hypothesized to be influenced by processes associated with controlling the contents of memory. In this project 328 adults ranging from 18 to 93 years of age performed six tasks (e.g., multiple trial recall with an interpolated interference list, directed forgetting, proactive interference, and retrieval inhibition) postulated to yield measures of the effectiveness of memory control. Although most of the patterns from earlier studies were replicated, only a few of the measures of memory control were reliable at the level of individual differences. Furthermore, the memory control measures had very weak relations with the age of the participant. Analyses examining the relations between established cognitive abilities and variables from the experimental tasks revealed that most of the variables were related only to episodic memory ability.