The "central" importance of loneliness in mental health: A network psychometric study

Loneliness is linked to negative mental health outcomes like depression and social anxiety. However, it is unclear how loneliness and these conditions are connected. This study aims to address two questions: (a) Are there pathways connecting loneliness to these conditions? (b) What symptoms play a role in these pathways? Using network analyses, the study examined a representative sample of 962 adults from the UK (mean age = 46, females = 492). The network analysis revealed four dimensions: depression, social anxiety and two dimensions for loneliness (isolation and social connectedness). Two distinct pathways were identified for the transmission of symptoms between loneliness, social anxiety and depression. The depression-isolation pathway involved a node representing the perceived loss of social connections. The social anxiety-social connectedness pathway was characterised by intimate interaction contexts. These findings suggest that loneliness is associated with different symptom pathways, potentially contributing to comorbidity between loneliness, social anxiety and depression.

Cultural Dimensions Moderate the Association between Loneliness and Mental Health during Adolescence and Younger Adulthood: A Systematic Review and Meta-Analysis

Cultural factors, such as country or continent, influence the relationship between loneliness and mental health. However, less is known about how cultural dimensions moderate this relationship during adolescence and younger adulthood, even if these dimensions manifest as country or continent differences. This study aims to examine the potential influence of Hofstede's cultural dimensions on this relationship using a three-level meta-analysis approach. A total of 292 studies with 291,946 participants aged 10 to 24 were included in this study. The results indicate that cultural dimensions, such as individualism vs. collectivism, indulgence vs. restraint, power distance, and long-term vs. short-term orientation, moderated the associations between loneliness and social anxiety, stress, Internet overuse, and negative affect. The association between loneliness and mental health was not moderated by cultural dimensions, such as masculinity and uncertainty avoidance. These findings suggest that culture's influence on the association between loneliness and mental health is based on a domain-specific mechanism.

Factors associated with perceived social isolation among veterans with spinal cord injury and disorders: Cross sectional survey

CONTEXT/OBJECTIVE

Examine demographics, injury characteristics, objective measures of social isolation and health factors that are associated with perceived social isolation (PSI) among Veterans with spinal cord injury and disorders (SCI/D).

DESIGN

Cross-sectional survey.

SETTING

The Veterans Health Administrations (VHA) SCI/D system of care.

PARTICIPANTS

Veterans with SCI/D who have used the VHA health care system.

INTERVENTION

Not applicable.

OUTCOMES MEASURES

We assessed unadjusted associations of high PSI (above population mean) vs low (normative/below population mean), and multivariable logistic regression for independent associations with PSI.

RESULTS

Out of 1942 Veterans with SCI/D, 421 completed the survey (22% response rate). Over half (56%) had PSI mean scores higher than the general population. Among the objective measures, having a smaller social network size was associated with increased odds of high PSI (OR 3.59, P < .0001); additionally, for health factors, having depression (OR 3.98, P < 0.0001), anxiety (OR 2.29, P = 0.009), and post-traumatic stress (OR 2.56, P = 0.003) in the previous 6 months, and having 4 or more chronically occurring secondary conditions (OR 1.78, P = 0.045) was associated with increased odds of high PSI. The most commonly identified contributors to feelings of PSI included mobility concerns (63%), having a SCI/D (61%), and concerns about being a burden on others (57%).

CONCLUSIONS

Factors such as social network size may be used to identify individuals with SCI/D at risk for PSI. Additionally, by identifying mental health problems, presence of multiple chronically occurring secondary conditions, and Veteran-identified contributors of PSI, we can target these factors in a patient-centered interventions to identify and reduce PSI.

Social disconnectedness and perceived social isolation in persons with spinal cord injury/dysfunction living in the community: A scoping review

Context: Persons with spinal cord injury/dysfunction (SCI/D) are particularly at risk for social disconnectedness and/or perceived social isolation, which are key components to overall well-being. However, there is limited evidence that aims to understand these phenomena in this population.Objective: To investigate what is known about social disconnectedness and perceived social isolation for adults with SCI/D living in the community.Methods: A scoping review was conducted. A computer assisted search of four online databases was completed on all articles published until May 18th, 2021. Gray literature and key agencies were also searched for relevant documents. Two key concepts (spinal cord injury/dysfunction and social disconnectedness/perceived social isolation) and associated terms were used. All articles were double screened for inclusion by two reviewers.Results: Following deduplication, title and abstract screening and full-text screening, 37 articles met the criteria for inclusion in this review. Most of the included articles were published in North America, used quantitative methods and a cross-sectional design. Articles identified several factors that influenced social disconnectedness and perceived social isolation including participant characteristics, social support, psychological well-being, participation in activities, the built environment and physical health.Conclusion: The current literature suggests that issues with social disconnectedness and perceived social isolation exist for persons living with SCI/D in the community. More work is needed to better understand the relationship between these constructs. A more nuanced understanding can inform targeted interventions to help mitigate the impact of these phenomena on the SCI/D population.

Aggressive intentions after social exclusion and their association with loneliness

Both social exclusion and loneliness are aversive experiences that can lead to hostile behavioral reactions, including aggressive behavior. This study aimed to assess whether a social exclusion scenario in the subject's imagination elicits aggressive reactions towards an excluding person as measured with the hot sauce paradigm. Furthermore, we studied the effect of loneliness on such reactions. In total, 251 subjects (67.7% female; mean age 27.3 ± 9.3 years) participated in this study which was based on an online survey. After trait loneliness was assessed with the UCLA Loneliness scale at baseline, two imaginary scenarios were presented in randomized order, i.e., an exclusion condition (with one of two working colleagues excluding the participant from a social activity) and an inclusion condition (without exclusion). Following each scenario, participants had the task to allocate the amount of hot sauce to each colleague that they find appropriate. Participants distributed significantly more hot sauce to the excluder than to the includers. The amount of hot sauce was significantly correlated with loneliness for all includer interactions (i.e., after the inclusion as well as the exclusion scenario), but not for the interaction with the excluder. Our results support the hypothesis that social exclusion elicits aggressive behavior. Interestingly, the experience of loneliness seems to be associated with an increase in aggressive behavioral tendencies or a lack of their inhibition. The cognitive and/or emotional processes underlying the interplay between social exclusion, loneliness and aggression should be a focus of future research.

A network analysis on the relationship between loneliness and schizotypy

BACKGROUND

Schizotypy is a multidimensional personality trait related to the heightened risk for the development of schizophrenia spectrum disorders. While it has been suggested that loneliness may be associated with schizotypy in general, whether it relates to the specific schizotypal traits differentially remains unknown. Besides, as loneliness often co-occurs with depression and anxiety, it is important to delineate its relationship with schizotypy in consideration of these co-occurring emotional disturbances.

METHODS

A demographically diverse sample of young people was obtained from multiple sources. The validated sample consisted of 2089 participants (68.4% female, age range: 18-30). The structural relationship between loneliness and schizotypy was modelled using a network analytic approach. The Gaussian graphical model with loneliness and nine schizotypal traits as nodes was first estimated without, and then with adjustment for the levels of depressive and anxiety symptoms. Edges were estimated as unique associations between nodes.

RESULTS

'Suspiciousness', 'odd beliefs or magical thinking', 'no close friends', 'constricted affect' and 'excessive social anxiety' were linked to loneliness directly. Loneliness was found to be more strongly associated with 'suspiciousness' and 'no close friends' than other schizotypal traits. After adjustment for the levels of depressive and anxiety symptoms, the above direct edges remained robust.

LIMITATIONS

The use of cross-sectional data indicated only undirected associations between variables.

CONCLUSIONS

Loneliness was more strongly linked to some schizotypal traits than others, with the relationships maintaining above and beyond the effects of anxiety and depression. These findings warrant further investigation of the specific relationships between loneliness and individual schizotypal traits.

Physical activity and life satisfaction among individuals with spinal cord injury: Exploring loneliness as a possible mediator

Context: There has been no known research investigating the association between leisure time physical activity (LTPA), loneliness, and life satisfaction among people with spinal cord injury or dysfunction (SCI/D). The relationship between these constructs is worthy of consideration given the positive health impacts of LTPA, the negative health impacts of loneliness, and heightened negative effects of loneliness on life satisfaction for individuals with SCI/D.Objectives: To examine the relationship between LTPA and loneliness, and examine loneliness as a possible mediator of the relationship between LTPA and life satisfaction among individuals with SCI/D.Design and Participants: Community dwelling individuals with SCI/D (N = 170) participated in a telephone-based survey as part of a larger project.Measures: LTPA (i.e. The Leisure Time Physical Activity Questionnaire-SCI, UCLA Loneliness Scale-3, and the Life Satisfaction Questionnaire-11 were administered to the participants.Results: Significant bivariate relationships were observed between LTPA and life satisfaction (r = .18, P = .02), LTPA and loneliness (r = -.15, P = .045), and loneliness and life satisfaction (r = -.69, P < .001). Mediation analyses suggest that loneliness significantly mediated the relationship between LTPA and life satisfaction (indirect effect = .003, 95% bootstrap CI = .0004 to .0062, CSI = .113).Conclusion: This was the first study to show evidence of a negative association between LTPA and loneliness among people with SCI/D, and to establish a conceptual model for understanding the potential mediating role of loneliness in the relationship between LTPA and life satisfaction among people with SCI/D.

Loneliness in Personality Disorders

PURPOSE OF REVIEW

Loneliness is a common experience in patients with personality disorders (PDs) that are characterized by impairment in self (identity, self-direction) and interpersonal functioning (empathy, intimacy). Here, we review studies assessing the association of loneliness with PD or PD traits including DSM-5's Alternative Model of PD (AMPD).

RECENT FINDINGS

The number of loneliness studies varied greatly among different PDs with most studies conducted in borderline PD. Across PDs, loneliness was associated with the severity of psychopathological symptoms and with several AMPD trait domains. Consequently, loneliness may contribute to PD severity and further impair personality functioning. Loneliness and PD share intra- and interpersonal factors (i.e., increased rejection sensitivity, information processing biases, social withdrawal) and common origins in childhood maltreatment that may explain their close association. Future research needs to investigate mechanisms on how loneliness and core characteristics of PD mutually reinforce each other in order to therapeutically address loneliness in PD.

Association between physical activity participation and perceived social isolation at older ages: Do social participation, age and sex differences matter?

BACKGROUND

Physical inactivity is a major risk factor for poor health. However, it is unclear how physical activity (PA) is associated with perceived social isolation (PSI) in older age. This study aims to explore 1) association between PA and PSI among older people in Ghana and 2) if social participation (SP), age and sex modify any associations.

METHODS

The study focused on 1,201 men and women aged ≥50 years in the AgeHeaPsyWel-HeaSeeB Study. Multivariate ordinary least squares (OLS) models were specified to estimate the regression coefficients and standard errors for the associations of PA and SP with PSI adjusting for potential confounders.

RESULTS

Multivariate OLS regressions showed that engagement in SP (b = -0.442; SE = 0.140; p < 0.001) and regular PA (b = -0.338; SE = 0.152; p < 0.005) were independently associated with decreasing PSI. Also, SP modified the PA-PSI association such that resourceful SP reinforced the link between PA and PSI (b = -0.709; SE = 0.276; p < .005). Finding revealed sex (men: b= -0.712; SE = 0.266; p < 0.005; women: p = 0.083) and age differences (65+: b = -0.437; SE = 0.206; p < 0.005; 50-64: b = -0.502; SE = 0.252; p < 0.05) in the effect of PA on PSI.

CONCLUSIONS

Findings provide insight into the importance of specific and combined effects of SP and PA on PSI in older age. Public health, clinical practice, and social policy efforts should target social healing and group PA interventions to improve older adults' emotional health.

Navigating from live to virtual social interactions: looking at but not manipulating smartphones provokes a spontaneous mimicry response in the observers

By gathering data on people during their ordinary daily activities, we tested if looking at, but not manipulating, smartphones led to a mimicry response in the observer. Manipulating and looking at the device (experimental condition), more than its mere manipulation (control condition), was critical to elicit a mimicry response in the observer. Sex, age and relationship quality between the experimenter and the observer had no effect on the smartphone mimicry response that tended to decrease during social meals. Due to the role of food as a tool in increasing social affiliation, it is possible that during communal eating, people engage in other forms of mimicry involving facial expressions and postures rather than the use of objects. Understanding the ethological mechanisms of the use of smartphones at everyday-social scale could unveil the processes at the basis of the widespread/increasing use of these devices at a large scale.

Physical activity and loneliness among adolescents with disabilities: Examining the quality of physical activity experiences as a possible moderator

BACKGROUND

Adolescents with disabilities (AWD) often report higher loneliness levels than adolescents without disabilities, as they frequently encounter barriers to social participation. A negative relationship between physical activity (PA) and loneliness has been established outside of AWD populations, while few studies have examined this association among AWD. Research investigating the relationship between PA and loneliness has not systematically examined aspects of PA experiences that may influence this relationship.

OBJECTIVES

The objectives of this study were to: a) examine the direct relationship between PA and loneliness among AWD, and b) examine the quality of PA experiences, as framed within a quality participation conceptualization, as a possible moderator of the relationship between PA and loneliness.

METHODS

This study was a cross-sectional sub-analysis of data from The National Physical Activity Measurement Study. Participants included 40 Canadian adolescents, age 10-17, with any type of disability who completed a series of questionnaires either online or via telephone/video interview.

RESULTS

PA and loneliness were not significantly related at the bivariate level (r = -0.10, p = .54), but quality of PA participation significantly moderated the relationship between PA and loneliness (95% C.I. = 0.002-0.019, p = .02). These results suggest that greater PA rates were significantly and negatively associated with loneliness among AWD who reported experiencing high quality PA experiences.

CONCLUSIONS

This research can be used as evidence to inform mechanistic studies with causal data to provide more robust findings on the possible value of high-quality PA experiences to mitigate feelings of loneliness among AWD.

Childhood Friendship Experiences and Cognitive Functioning in Later Life: The Mediating Roles of Adult Social Disconnectedness and Adult Loneliness

BACKGROUND AND OBJECTIVES

This study investigated the relationship between childhood friendships and cognitive functioning, as assessed with cognitive status and decline among adults aged 45 and older in China. We also examined the mediating effect of adult social disconnectedness and adult loneliness for this relationship.

RESEARCH DESIGN AND METHODS

This study was based on 3 waves of data from the China Health and Retirement Longitudinal Study (CHARLS; 2011, 2013, 2015; N = 13,959). Cognitive functioning was assessed with episodic memory. Childhood friendship measures were taken from the 2014 life history module of the CHARLS. Two dimensions of adult social isolation, loneliness and social disconnectedness, were included as mediators. Latent growth curve modeling was utilized to test the associations between childhood friendships, adult social isolation, and cognitive functioning.

RESULTS

Adverse childhood friendship experiences were found to be significantly associated with both lower initial cognitive status and the rate of decline in cognitive functioning. Our findings indicated that adult loneliness and social disconnectedness partly mediated the link between childhood friendship experiences and the initial level of cognitive functioning, but not cognitive decline later in life.

DISCUSSION AND IMPLICATIONS

The findings emphasized the enduring importance of childhood friendships for cognitive functioning later in life. Interventions that focus on improving social participation through fostering friendships in childhood may have long-term benefits for cognition later in life.

Loneliness and the psychosis continuum: a meta-analysis on positive psychotic experiences and a meta-analysis on negative psychotic experiences

There is an increase in interest in the relationships between loneliness and psychosis. The notion of psychosis continuum implies that psychotic experiences extend from clinical populations with psychotic disorders to non-clinical populations. This meta-analytic review aimed to examine the respective associations of loneliness with positive and negative psychotic experiences along the psychosis continuum. A systematic database search was conducted and a total of 30 studies were included in the first meta-analysis and 15 studies were included in the second meta-analysis. There was a medium association between loneliness and positive psychotic experiences (r = 0.302, p < 0.001). In particular, the association between loneliness and paranoia was robust (r = 0.448, p < 0.001). The second meta-analysis revealed a medium association between loneliness and negative psychotic experiences (r = 0.347, p < 0.001). The associations between loneliness and both positive and negative psychotic experiences were found to be smaller among clinical than non-clinical samples. The above findings provided evidence for the associations between loneliness and the two core dimensions of psychotic experiences along the phenomenological continuum. Future research should examine the dynamics of these relationships in both clinical and non-clinical samples, preferably using a single-symptom approach.

The antecedents of loneliness in older people with an intellectual disability

INTRODUCTION

The cognitive discrepancy approach to loneliness is often used to describe loneliness in ageing populations, but to date, it has never been used to explore loneliness in older people with an intellectual disability. An analysis is needed utilising a refined list of causes of loneliness in this population.

METHOD

Using data from a nationally representative dataset of people aged over 40 with an intellectual disability (N = 708), this analysis runs repeated regressions of variables grouped into conceptual blocks, organised from sociodemographic to network quality.

RESULTS

Variables selected predicted 23% of the loneliness variance. Functional limitations, education, working in the community, transport difficulties, pain, stress caused by service change, emotional health problems and confiding were all significant predictors of loneliness.

CONCLUSION

That for those with fewer functional limitations only transport difficulties precipitated loneliness, suggests living a more independent life protects from loneliness, in this group. Those with functional limitations and who lead a more service dependent life appear more exposed to loneliness precipitating variables.

Loneliness in psychosis: a systematic review

PURPOSE

The aim of the review is to understand the relationships between loneliness and related psychological and social factors in individuals with psychosis. Loneliness is poorly understood in people with psychosis. Given the myriad of social challenges facing individuals with psychosis, these findings can inform psychosocial interventions that specifically target loneliness in this vulnerable group.

METHODS

We adhered to the PRISMA guidelines and systematically reviewed empirical studies that measured loneliness either as a main outcome or as an associated variable in individuals with psychosis.

RESULTS

A total of ten studies examining loneliness in people diagnosed with a psychotic disorder were examined. Heterogeneity in the assessment of loneliness was found, and there were contradictory findings on the relationship between loneliness and psychotic symptomatology. In individuals with psychosis, loneliness may be influenced by psychological and social factors such as increased depression, psychosis, and anxiety, poor social support, poor quality of life, more severe internalised stigma and perceived discrimination, and low self-esteem.

CONCLUSIONS

The relationship between loneliness and psychosis remains poorly understood due to a lack of rigorous studies. Although having strong social relationships is crucial to facilitate recovery from serious mental illness, psychosocial interventions that specifically target loneliness in individuals with psychosis are lacking and sorely needed. Interventions targeting loneliness in those with psychosis will also need to account for additional barriers associated with psychosis (e.g., social skill deficits, impoverished social networks, and negative symptoms).

Loneliness and depressive symptoms among older adults: The moderating role of subjective life expectancy

Loneliness and depressive symptoms are closely related, and both are indicators of reduced physical and mental well-being in old age. In recent years, the subjective perception of how long an individual expects to live (subjective life expectancy) has gained importance as a significant predictor of future psychological functioning, as well as of physical health. The current study examined whether subjective life expectancy moderates the connection between loneliness and depressive symptoms in a representative sample of older adults. Data was collected from the Israeli component of the fifth wave of the Survey of Health, Ageing and Retirement in Europe (SHARE-Israel). Participants (n=2210; mean age=70.35) completed measures of loneliness, depressive symptoms, and life expectancy target age. A hierarchical regression analysis predicting depressive symptoms yielded a significant interaction of loneliness and subjective life expectancy. Further analyses demonstrated that low subjective life expectancy mitigated the loneliness-depressive symptoms connection. Findings are discussed in light of the potential burden of higher subjective life expectancy for lonesome older adults, and practical implications are suggested.

A daily diary study of perceived social isolation, dietary restraint, and negative affect in binge eating

Negative affect and dietary restraint are key predictors of binge eating, yet less is known about the impact of social factors on binge eating. The study sought to replicate and extend research on the relationships between negative affect, dietary restraint, perceived social isolation and binge eating using a daily diary methodology. College women (N = 54) completed measures of dietary restraint, negative affect, perceived social isolation, and binge eating daily for 14 days. Participants completed the measures nightly each day. A series of generalized estimating equations showed that dietary restraint was associated with less binge eating while controlling for negative affect and for perceived social isolation separately. Negative affect and perceived social isolation were associated with greater binge eating while controlling for restraint in separate analyses, but only perceived social isolation was significant when modeled simultaneously. All two-way interactions between negative affect, dietary restraint, and perceived social isolation predicting binge eating were nonsignificant. This study furthers our understanding of predictors of binge eating in a nonclinical sample. Specifically, these data suggest perceived social isolation, negative affect, and dietary restraint are important variables associated with binge eating in daily life and warrant further research.