Effect of Centrality on Physical Activity in Late Childhood: A 1-Year Prospective Cohort Study.

BACKGROUND/OBJECTIVES: Engaging in physical activity (PA) is crucial for children's physical and mental health, with PA in childhood influencing lifelong activity levels. However, PA during childhood tends to decrease with age. Childhood friendship networks influence various health behaviors, including physical activity. Centralities are objective measures of an individual's position and role in friendship networks. The relationship between centrality and PA is inconsistent. This study aimed to determine how centrality affects changes in PA in late childhood longitudinally and to investigate the distribution of centrality in the network. METHODS: This prospective cohort study recruited fourth- and fifth-grade children (9-11 years old). A total of 143 children participated. We calculated three centralities-in-degree, closeness, and betweenness-based on social network analysis (SNA). PA was assessed using the physical activity questionnaire for older children (PAQ-C). To explore the relationship between centralities and the percentage change in PA, a multivariate logistic regression analysis was performed. RESULTS: Children with higher closeness had a significantly higher rate of decrease in PA after adjusting for confounding factors. There was no significant association between betweenness and percentage change in PA (p = 0.66) or in-degree and percentage change in PA (p = 0.21). CONCLUSIONS: This study highlights the importance of considering social network dynamics in PA interventions, particularly for children with high social closeness. Future research should incorporate objective PA measures and explore broader social networks to enhance intervention strategies, especially for Generation Z and Alpha, who experience unique opportunities and motivations for PA due to pervasive digital environments.

On the spurious effect of intergroup friendship on outgroup attitudes in schools: The role of social influence and the positive impact of exposure to outgroup peers.

Promoting intergroup friendships in schools is regarded as a powerful strategy for improving outgroup attitudes. However, stochastic actor-oriented modelling (SAOM) studies have often revealed no association between intergroup friendship and outgroup attitudes. I investigated whether SAOM studies reported no effect of intergroup friendship on outgroup attitudes, what was responsible for this surprising finding and whether exposure to outgroup peers was positively related to outgroup attitudes. The meta-analysis of SAOM studies confirms no association between intergroup friendship and outgroup attitudes. Examining longitudinal social network data of 2700 German students, I found that a positive link between intergroup friendship and outgroup attitudes appeared only when I did not control for social influence. This indicates that intergroup friendship did not automatically improve outgroup attitudes. Instead, the development of outgroup attitudes among students depended on social influence and, thus, the quality of outgroup attitudes among their outgroup friends. Exposure to outgroup peers was, however, positively associated with outgroup attitudes. These findings reframe intergroup contact theory by suggesting that intergroup friendship is not essential for improving outgroup attitudes. Rather, social influence and exposure to outgroup peers could be key factors shaping outgroup attitudes.

Developing and testing a community based, online vs. face-to-face peer led intervention to improve mental well-being in Cambodian adults with physical disabilities.

Background: Despite growing international attention, there remains an urgent need to develop mental health services within low and middle income countries. The Khmer Rouge period in Cambodia saw the destruction of all health services infrastructure in the 1970s. Consequently, Cambodia has struggled to rebuild both its economy and healthcare system, with the number of qualified mental health clinicians remaining disproportionately low. Resultantly, there is a pressing need to develop low-cost community based alternatives of mental healthcare. Methods: Using a mixed methods design, researchers developed an 8-week peer-led intervention, known as a Friendship Group, for adults with physical disabilities using both face-to-face and online delivery methods. The Wilcoxon Signed-Rank test was used to assess changes in pre-post survey scores and qualitative data was collected in form of five focus groups post intervention. Results: 41 participants were allocated across four Friendship groups - two were online and two face-to-face. Attrition rate was 22% post-intervention (n = 32). ITT analyses showed a statistically significant decrease in psychological distress scores [Z = -3.808, p < .001] from pre [Mdn = 20, IQR = 16.5-25.5] to post [Mdn = 16, IQR = 14-18.5] intervention. A Wilcoxon signed-ranks test also showed a statistically significant decrease in PTSD scores [Z = -2.239, p < .025] from pre [Mdn = 4, IQR = 3-5] to post [Mdn = 3, IQR = 2.75-4] intervention. There was also a statistically significant decrease in worry scores [Z = -3.904, p < .001] from pre [Mdn = 5, IQR = 3.5-6.5] to post [Mdn = 3, IQR = 3-4] intervention. There were no significant group differences between the face to face and online groups. A number of interconnected themes emerged from focus group data (n = 5), these included the mental health benefits of Friendship Groups as conceptualised through knowledge acquisition, skill development and peer support. Conclusions: The Friendship group intervention delivered in both online and face-to-face formats appears feasible and acceptable within the Cambodian context. Initial data revealed positive findings in terms of reduction in psychological distress, worry and PTSD symptoms as well increased feeling as calm.

'When I came to university, that's when the real shift came': alcohol and belonging in English higher education.

While young people's alcohol consumption has fallen sharply in the United Kingdom and other high-income countries, universities remain places where heavy drinking is routine and normative. Drawing on interviews with undergraduate students, this article explores how heavy drinking is part of how students negotiate a sense of belonging and form personal relationships. Theoretical work on belonging and relationality is used to make sense of students' encounters with alcohol. Consistent with the decline in youth drinking, several interviewees had limited experience of heavy drinking prior to university, and some were not interested in taking it up. After describing how heavy drinking facilitates belonging in certain spaces of student life, we examine the strategies of non- and low-drinking students in navigating these spaces. Attending to their strategies suggests that becoming known as 'social persons' is key to negotiating belonging without drinking heavily. We conclude by considering how universities might better accommodate the desire for belonging for the increasingly large proportion of students with limited experience of or desire for alcohol by creating opportunities for students to form personal relationships in ways that do not involve alcohol or where alcohol is peripheral to the activity.

The Association between Social Isolation and Physical Activity among Korean Adolescents.

OBJECTIVES: This study investigated the impact of structural isolation within peer relationships on physical activity levels among Korean adolescents, exploring how different types of social isolation within classroom networks influence physical activity. METHODS: This study utilized cross-sectional survey data. Specifically, using data from the 8th Korean Children and Youth Happiness Index survey (2016), which included 3356 middle and high school students in Korea, the study employed binary logistic regression and social network analysis to assess the relationship between social isolation and physical activity. Based on types of isolation, adolescents were categorized into social avoidant, actively isolated and socially indifferent groups. RESULTS: The analysis demonstrated significant differences in physical activity based on social isolation status (χ2 = 13.0, p < 0.001) and types of social isolation (χ2 = 18.3, p < 0.001). Key variables such as gender, household subjective economic status, and self-rated health significantly influenced physical activity. The number of physically active friends had a considerable impact on both non-isolated groups (OR = 1.31, p < 0.001) and the actively isolated group (OR = 1.42, p < 0.05). The actively isolated group exhibited the highest explanatory power in the logistic regression models (Nagelkerke R² = 0.230). CONCLUSIONS: This study has highlighted that not only social isolation but also the type of isolation significantly influences physical activity among adolescents. Understanding these distinctions and tailoring interventions accordingly are crucial for promoting physical activity among socially isolated adolescents.

Realization of affiliation goals, interpersonal identity development, and well-being: effects of the implicit affiliation motive among German and Zambian adolescents.

Introduction: Across various cultural contexts, success in goal realization relates to individuals' well-being. Moreover, commitment to and successful pursuance of goals are crucial when searching for a meaningful identity in adolescence. However, individuals' goals differ in how much they match their implicit motive dispositions. We hypothesized that successful pursuance of affiliation goals positively relates to commitment-related dimensions of interpersonal identity development (domain: close friends) that, in turn, predict adolescents' level of well-being. However, we further assumed that the links between goal success and identity commitment are particularly pronounced among adolescents who are characterized by a high implicit affiliation motive. Methods: To scrutinize the generalizability of the assumed relationships, data were assessed among adolescents in individualistic (Germany) and collectivistic (Zambia) cultural contexts. Results: Regardless of adolescents' cultural background, we found that commitment-related dimensions of interpersonal identity development mediate the link between successful attainment of affiliation goals and well-being, particularly among adolescents with a pronounced implicit affiliation motive; that is, the strength of the implicit affiliation motive moderates the association between goal success and identity commitment. Conclusion: We discuss findings concerning universal effects of implicit motives on identity commitment and well-being.

Constrained Flooding Based on Time Series Prediction and Lightweight GBN in BLE Mesh.

Bluetooth Low Energy Mesh (BLE Mesh) enables Bluetooth flexibility and coverage by introducing Low-Power Nodes (LPNs) and enhanced networking protocol. It is also a commonly used communication method in sensor networks. In BLE Mesh, LPNs are periodically woken to exchange messages in a stop-and-wait way, where the tradeoff between energy and efficiency is a hard problem. Related works have reduced the energy consumption of LPNs mainly in the direction of changing the bearer layer, improving time synchronization and broadcast channel utilization. These algorithms improve communication efficiency; however, they cause energy loss, especially for the LPNs. In this paper, we propose a constrained flooding algorithm based on time series prediction and lightweight GBN (Go-Back-N). On the one hand, the wake-up cycle of the LPNs is determined by the time series prediction of the surrounding load. On the other, LPNs exchange messages through lightweight GBN, which improves the window and ACK mechanisms. Simulation results validate the effectiveness of the Time series Prediction and LlightWeight GBN (TP-LW) algorithm in energy consumption and throughput. Compared with the original algorithm of BLE Mesh, when fewer packets are transmitted, the throughput is increased by 214.71%, and the energy consumption is reduced by 65.14%.

Factors influencing contraceptive utilisation among postpartum adolescent mothers: a cross sectional study at China-Uganda friendship hospital.

BACKGROUND: Globally, modern contraceptives remain underutilized among postpartum mothers resulting in the rise of short birth intervals. While there are a range of other factors that moderate the uptake of contraceptive services, understanding the significance of their influence is critical in public health programming. This study sought to analyze maternal and health facility factors influencing the utilization of contraceptives among postpartum mothers in urban areas of Uganda. METHODS: Using a cross-sectional study design, a health facility-based study in urban areas of Kampala was conducted from January to March 2023. A total of 332 women aged between 15 and 22 years were randomly selected for the interviews using semi-structured questionnaires. The data was analyzed using a statistical software program R version 4.1.2. Chi-square and multivariable logistic regression were used to determine factors associated with postpartum contraceptive intake among adolescent mothers. RESULTS: Overall, 28.3% of contraceptive usage was reported in the current study. The majority of the respondents, 98 (29.52%), were within the age group of 17-18 years, and the unmarried were 255 (76.81%). Factors associated with contraception use were income below UgX 500,000 (OR 4.546; CI 1.785-12,193, p = 0.002), occupation status of housewife and student (OR: 3.526; CI: 1.452-8.812, p = 0.006), distance of less than 5 km from health facility (OR: 2.62; CI 1.97-3.55; p = 0.028), and having a contraceptive preference (OR: 3.526; CI: 1.452-8.812, p = 0.006). CONCLUSIONS: Contraceptive use is low among adolescent post-partum mothers. Income, occupation status, proximity to a health facility, and preference for a particular contractive method are factors associated with contraceptive use in this study. Understanding attitudes and views regarding contraception use is therefore essential for creating effective interventions, given the detrimental effects of adolescent pregnancy.

Parental Warmth, Friendship Quality, Empathy and Bystander Defending Behavior in Cyberbullying Among Adolescents in China.

Adolescents' bystander defending behavior in cyberbullying contributes to reducing the harm done to cyberbullying victims. This study examined the relationships and underlying mechanisms of parental warmth, friendship quality, empathy and bystander defending behavior in cyberbullying among 848 Chinese adolescents (43.986% girls, mean age = 14.960 years old [SD = 1.398]). The results showed that parental warmth, friendship quality and empathy were all positively correlated with bystander defending behavior in cyberbullying among adolescents. Both friendship quality and empathy played a mediating role between parental warmth and bystander defending behavior in cyberbullying, indicating that parental warmth was associated with increased bystander defending behavior through higher levels of friendship quality and empathy, respectively. Friendship quality and empathy also played a chain mediating role between these two, indicating that parental warmth was linked to increased bystander defending behavior by first associating with higher level of friendship quality and subsequently with greater empathy. These results suggest that high degrees of parental warmth, friendship quality and empathy may all increase the likelihood of bystander defending behavior in cyberbullying among adolescents. This study provides practical implications for improving adolescent bystander defending behavior in cyberbullying.

Exploring Within-Gender Differences in Friendships Using an Online Social Network.

People tend to befriend others similar to themselves, generating a pattern called homophily. However, existing studies on friendship patterns often rely on surveys that assess the perspective of relatively few participants on their friendships but do not measure actualized friendship patterns. Here, we used data from a large Slovakian online social network to assess the role of gender, age, and body mass index (BMI) in same-gender online connections among more than 400,000 users. We found that age and BMI homophily occurred in both men's and women's same-gender connections, but somewhat more strongly among men's. Yet, as women diverged in BMI, their connections were less likely to be reciprocated. We discuss how the evolutionary legacy of men's coalitional competition (e.g., warfare) and women's mating competition or recruitment of allocare providers might contribute to these patterns in modern same-gender relationships. For example, men's engagement in physical activities may lead to similar formidability levels among their same-gender peers. Altogether, our findings highlight the importance of trait similarity to same-gender friendship patterns.

Recent stressful life events and identity development in emerging adults: An examination of within-person effects.

OBJECTIVE: To examine longitudinal associations among stressful life events and identity processess in emerging adults while accounting for within-person and between-person effects. BACKGROUND: Theoretical perspectives suggest that stressful life events may impact one's identity (i.e., coherent sense of self), but few studies have considered how changes in stressful life events are associated with changes within an individual's identity development over time (within-person effects). METHODS:  Recent stressful life events (i.e., academic problems, friendship problems, romantic problems, and time pressure) and the processes through which identity develops (e.g., exploring in breadth and depth) were examined longitudinally (T1-T3) in a sample of emerging adults (N = 1125, Mage = 17.96 years). RESULTS: Random-intercept cross-lagged modeling demonstrated that at the between-person level, emerging adults with greater academic and friendship problems, as well as more time pressures (relative to their counterparts), tended to engage in greater ruminative exploration. Further, those with more academic problems tended to demonstrate weaker commitment-making and exploration in breadth and depth (relative to their counterparts). Within-person increases in romantic problems predicted lower commitment-making and higher ruminative exploration over time. CONCLUSION: Findings suggest that romantic problems may predict within-person changes in identity processes, whereas academic problems, friendship problems, and time pressure may be more concurrently related to identity development.

Meta-analytic structural equation modeling for exploring workplace friendship, well-being, and organizational commitment.

BACKGROUND: Workplace friendships, which are informal relationships in the workplace, foster mutual trust, assistance, and emotional support and create a sense of belonging among coworkers. Employees with positive perceptions of their job responsibilities, psychological needs, and work environment experience happiness, satisfaction, and an overall sense of well-being. A heightened sense of well-being in the workplace positively affects employee satisfaction with job tasks and the work environment, reinforcing employees' sense of belonging and organizational commitment. OBJECTIVE: The study proposed and validated a theoretical model, with meta-analytic structural equation modeling employed to conduct quantitative, empirical research on workplace friendships, well-being, and organizational commitment in Taiwan and to analyze correlations between relevant variables. METHODS: The theoretical model was further validated through structural equation modeling, which yielded favorable goodness of fit in terms of various indicators. RESULTS: The mediating effect of well-being was verified through bootstrapping analysis. Within a 95% confidence interval, the total effect size of workplace friendships on organizational commitment was 0.549, which is the sum of its direct effect (0.255) and indirect effect (0.294). CONCLUSIONS: This finding indicates that well-being plays a mediating role in the association between workplace friendships and organizational commitment. The proposed theoretical model in this study is supported. Finally, the research results are discussed, and practical suggestions are provided.

Marital Status and Happiness During the COVID-19 Pandemic.

Objective: This study examines the long-observed marital advantage in happiness during the COVID-19 pandemic. Background: The COVID-19 pandemic may have altered the marital advantage in happiness due to changes in social integration processes. However, this has not been explored in previous studies. Method: Data were from the COVID-19 substudy of the National Social Life, Health, and Aging Project (N=2622). A series of regressions were estimated to understand marital status differences in pandemic happiness and changes in relationships with non-resident family and friends. Karlson-Holm-Breen mediation analysis was conducted to examine whether relationships with non-resident family and friends explained the marital association with pandemic happiness. Results: From pre-pandemic to pandemic, married respondents experienced a greater increase in unhappiness than unmarried counterparts, narrowing happiness gaps. However, unmarried individuals, including cohabiting, divorced, widowed, and never married individuals, continued to report higher levels of unhappiness during the pandemic than married peers. These differences primarily stemmed from pre-pandemic happiness. After controlling for pre-pandemic happiness, cohabiting, widowed, and never married older adults did not significantly differ from their married counterparts in reporting unhappiness during the pandemic. In contrast, divorced individuals remained consistently more unhappy than married individuals during the pandemic, mainly due to deteriorated relationship quality with non-resident family. Conclusion: During a global crisis, it is crucial for policymakers, healthcare providers, and researchers to develop innovative interventions to promote happiness and healthy aging among all older adults, paying special attention to those who are divorced.

Am I Broken?: A mixed-method analysis of an ethnotheatrical performance about women's experiences with infertility and friendship.

BACKGROUND: This study evaluated an ethnotheatrical performance about infertility to bring awareness to the health condition and its impact on friendships. METHODS: After each performance (N = 2), attendees participated in a talkback session to express thoughts and ask questions about the production; then, they completed a survey describing their overall experience. Analyses included descriptive statistics for Likert questions and a thematic analysis for open-ended responses. RESULTS: Eighty-six percent of attendees found the performance informative about the challenges infertility imposes on everyday life, and more than 60% gained new information and advice on how to talk about infertility. The thematic analysis revealed three themes: learn about the complexities of infertility experiences, develop empathy towards individuals with infertility, and respond appropriately to individuals coping with infertility. CONCLUSION: The performance offered a safe environment for attendees to learn, understand, and process infertility's complex nature. Creating awareness influenced participants' perceptions and communicative behaviors.

Neural Similarity and Synchrony among Friends.

Researchers have long recognized that friends tend to exhibit behaviors that are more similar to each other than to those of non-friends. In recent years, the concept of neural similarity or neural synchrony among friends has garnered significant attention. This body of research bifurcates into two primary areas of focus: the specificity of neural similarity among friends (vs. non-friends) and the situational factors that influence neural synchrony among friends. This review synthesizes the complex findings to date, highlighting consistencies and identifying gaps in the current understanding. It aims to provide a coherent overview of the nuanced interplay between social relationships and neural processes, offering valuable insights for future investigations in this field.

Longitudinal Associations Between Friendship Ethnic/Racial Composition and Ethnic/Racial Identity: The Role of School Ethnic/Racial Diversity.

Schools and friendships represent important but distinct contexts for adolescent identity development. However, research has yet to explore the long-term interplay between these factors on ethnic/racial identity (ERI). This study included a sample of 640 adolescents from 9 public high schools in a diverse United States metropolis (Mage = 14.50, SD = 0.67; 44% Asian, 20% Black, 36% Latinx; female = 68%, male = 32%, non-binary = 0%). Latent growth curve modeling was conducted to investigate longitudinal associations in friendship ethnic/racial composition and ERI exploration. From the 9th-11th grades, same-race friends and ERI exploration increased linearly whereas friendship ethnic/racial diversity decreased linearly. Adolescents attending more ethnically/racially diverse schools maintained more ethnically/racially diverse friends over time but did not differ in changes in ERI exploration compared to adolescents in less diverse schools. There was no association between the rates at which adolescents' friendship ethnic/racial composition and ERI changed over time. More ethnically/racially diverse friends in the 9th-grade predicted faster increases in subsequent ERI exploration. The findings highlight important differences in the roles of friendship and school contexts on ERI, suggesting that friendship ethnic/racial diversity, but not school ethnic/racial diversity, facilitated ERI exploration over time. School ethnic/racial diversity did facilitate a slower decline in friendship ethnic/racial diversity, emphasizing the importance of school integration.

Links Between Best-Friendship Quality and Well-Being From Early Emerging Adulthood to Early Established Adulthood.

The aim of this study was to verify whether the links between features of best-friendship quality (intimacy, reliable alliance, conflict) and well-being indicators (self-esteem, loneliness) change from early emerging adulthood to early established adulthood. The moderating effect of gender and investment in romantic life on these links was examined as well. For the purpose, 346 individuals (58% women) completed questionnaires at age 20 and again at age 30. Multilevel analysis were performed for each well-being indicators separately. The results showed reliable alliance to be associated with both well-being indicators, and intimacy to be associated with loneliness. Age moderated the effect of intimacy on self-esteem, whereas investment in romantic life moderated the effect of reliable alliance. Finally, triple interactions emerged between conflict, gender and age in their associations with self-esteem and loneliness, underscoring particularities for men. These results underscore the most influential features of friendship quality for well-being.

Investigating the effects of prenatal testosterone exposure (via 2D:4D) and socio-relational factors on 3-6-year-old preschoolers' prosocial choices.

BACKGROUND AND AIMS: Prosocial behavior such as helping and sharing develops early in childhood. Yet very few studies have investigated physiological and relational factors shaping prosociality among children. Here, we systematically examined the role of prenatal androgen exposure alongside prestige, dominance, and friendship in 3-6-year-old preschoolers' prosocial sharing with familiar peers. METHODS: We tested a sample of 65 children, predominately of European descent. We used a cost-free direct-interaction prosocial choice task to assess children's prosocial tendencies. Second-to-fourth digit ratio (2D:4D) was used as a retrospective biomarker for prenatal androgen exposure. Prestige was measured through behavioral observations of interaction partners and visual regard, dominance through teacher questionnaires, and friendship via peer preference assessments. RESULTS: We found that children acted prosocially when tested with a familiar peer. Children with lower 2D:4D (higher prenatal androgen exposure) behaved more prosocially. Further, there were marginal associations between the donors' prosocial tendencies and their visual regard as a proxy of their prestige (positive effect) and their teacher-rated dominance relative to the recipient (negative effect). Neither age, sex, nor friendship influenced prosocial choices. CONCLUSIONS: Prenatal androgen exposure, approximated via 2D:4D, was associated with prosocial behavior. In contrast to previous research in older children, higher exposure was related to stronger prosocial tendencies, which corresponds to earlier findings on fairness in adults. Our findings point towards a potential role of sex steroids in the early development of children's social behavior, but they have to be interpreted with caution due to the small sample size of the current study. Nevertheless, they underscore the importance of integrating biological and psychological perspectives, while also highlighting the significance of studying the development of prosocial behavior within peer groups.

The Social Processes of Excessive Online Gaming Homophily: Peer Selection or Influence?

Adolescents who befriend online game using peers may be at risk for initiated and continued excessive game use (online gaming use homophily). The present article examined how adolescents' severity of online gaming use related to their friends' online gaming behavior bi-directionally across a semester (peer selection or peer influence effect). Students from two universities completed three waves of online surveys within four and a half months (N = 3079; 33.6% female; Mage = 19.16; SD = 0.97). Random-intercepts, Cross-Lagged Panel Model (RI-CLPM) analyses revealed that peer selection and peer influence both promote online gaming use homophily in adolescents' friendship groups. Furthermore, participants were more likely to form new friendships with peers exhibiting similar online gaming behavior as their behavior, subsequently reinforcing their online gaming use behaviors within these relationships. These social processes may exhibit a time lag among girls, which needs to be confirmed through longer-term follow-up. In general, findings suggest that effective prevention programs targeting excessive online gaming should not only focus on promoting social influence skills but also consider the structure of peer environments.

The Relation between Residential Mobility and Internalizing and Externalizing Problems in Adolescence: The Role of Subjective Moving Experience, Gender, and Friendship Quality.

Adolescent residential mobility can be a stressful life event, potentially aggravating internalizing or externalizing problems. However, the longitudinal effects of residential mobility are understudied and may be context-dependent. This study investigates the longitudinal associations between adolescent residential mobility and internalizing and externalizing problems. Additionally, this study examines for whom residential moves are most detrimental by including subjective moving experience, gender, and friendship quality before the move as moderators. Longitudinal data from 2,029 adolescents (51% female) from the TRacking Adolescents' Individual Lives Survey (TRAILS) were used (Mage [SD] at T1 = 11.1 [0.55], T2 = 13.6 [0.52], and T3 = 16.3 [0.70]). Results from stepwise multi-level random-effect models showed that adolescents who experienced an unpleasant move remained stable in internalizing problems, while others decreased over time. Adolescents who moved increased stronger in externalizing problems than adolescents who did not move, independent of whether they experienced the move as unpleasant. Gender and friendship quality before the move did not moderate the relation between residential mobility and internalizing or externalizing problem development. These results emphasize that residential moves in adolescence, especially when experienced as unpleasant, can have long-lasting negative effects on adolescent development.