Hypothermic oxygenated perfusion (HOPE) safely and effectively extends acceptable donor heart preservation times: Results of the Australian and New Zealand trial.

BACKGROUND: Cold static storage preservation of donor hearts for periods longer than 4 hours increases the risk of primary graft dysfunction (PGD). The aim of the study was to determine if hypothermic oxygenated perfusion (HOPE) could safely prolong the preservation time of donor hearts. METHODS: We conducted a nonrandomized, single arm, multicenter investigation of the effect of HOPE using the XVIVO Heart Preservation System on donor hearts with a projected preservation time of 6 to 8 hours on 30-day recipient survival and allograft function post-transplant. Each center completed 1 or 2 short preservation time followed by long preservation time cases. PGD was classified as occurring in the first 24 hours after transplantation or secondary graft dysfunction (SGD) occurring at any time with a clearly defined cause. Trial survival was compared with a comparator group based on data from the International Society of Heart and Lung Transplantation (ISHLT) Registry. RESULTS: We performed heart transplants using 7 short and 29 long preservation time donor hearts placed on the HOPE system. The mean preservation time for the long preservation time cases was 414 minutes, the longest being 8 hours and 47 minutes. There was 100% survival at 30 days. One long preservation time recipient developed PGD, and 1 developed SGD. One short preservation time patient developed SGD. Thirty day survival was superior to the ISHLT comparator group despite substantially longer preservation times in the trial patients. CONCLUSIONS: HOPE provides effective preservation out to preservation times of nearly 9 hours allowing retrieval from remote geographic locations.

Diversity protects: The role of school and classroom racial/ethnic diversity on the experience of peer victimization during the middle school years.

The effects of school and classroom racial/ethnic diversity on peer victimization, self-blame, and perceived school safety were examined in a racially/ethnically diverse sample of students followed over the three years of middle school. Sixth grade students (N = 5,991, 52% female; M = 11.63 years) were recruited from 26 urban middle schools that systematically varied in racial/ethnic diversity. Based on student self-report, the sample was 31.6% Latino/Mexican, 19.6% White, 17.4%, Multiethnic/Biracial, 13% East/Southeast Asian, 10.9% Black, and 6.9% Other very small racial/ethnic groups. Each school had a structural diversity score based on the number and size of racial/ethnic groups enrolled. Using a novel method based on course schedules and class rosters, each student's individual exposure to diversity in their classes was assessed to capture dynamic diversity. Latent growth modeling showed that structural school diversity and dynamic classroom diversity were both related to less victimization at the start of middle school and a decrease over time. Dynamic classroom diversity buffered the associations between victimization and self-blame and between victimization and perceiving school as unsafe. Dynamic classroom diversity was more protective than structural school diversity. Implications for practice, intervention and policies to promote school racial/ethnic diversity were discussed.

Young Adult Adaptability to the Social Challenges of the COVID-19 Pandemic: The Protective Role of Friendships.

The continuing COVID-19 pandemic enables assessment of the adaptability of young adults to non-normative stressors threatening their social-emotional wellbeing. Focusing specifically on a developmentally critical social challenge of restricted in-person contact, the goal of the current study was to examine the role of friendships in alleviating social-emotional problems. Data were collected via online surveys from an ethnically diverse sample (n = 1557) of 20 to 24-year-olds (62% cisgender female, 31% male, 7% gender diverse or gender questioning) in spring of 2021. Longitudinal data from an earlier time point involving an age-normative social challenge (transition out of high school) were used as a comparison. The comparisons between the transition from high school and the pandemic showed that whereas social anxiety and depressive symptoms increased, loneliness decreased. Participants also reported having slightly more friends and rated the overall quality of their friendships as somewhat higher. Regression analyses revealed that a greater number of friends over time and greater satisfaction with friend electronic communication during the pandemic were most robustly related to lower social and generalized anxiety as well as depressive symptoms, over and above earlier social-emotional wellbeing and a number of relevant correlates. Loneliness was protected by higher quality of friendships, greater contact with friends, as well as more frequent and satisfying electronic communication with friends. The results suggest that although young adults are facing emotional challenges during the continued pandemic, they are also able to adapt by keeping in touch with friends to decrease subjective sense of isolation. The findings have novel intervention implications to reduce loneliness.

Racial/ethnic discrimination, cultural mistrust, and psychological maladjustment among Asian American and Latino adolescent language brokers.

OBJECTIVE: Past studies on language brokering have examined how various individual and contextual factors influence the association between language brokering and mental health outcomes, but few studies have assessed how racial/ethnic discrimination or perceptions of how society treats one's racial/ethnic group (i.e., cultural mistrust) affects mental health outcomes. The goal of this study was to examine how reports of racial/ethnic discrimination and perceptions of cultural mistrust influence mental health outcomes for adolescent language brokers. METHOD: Multiple linear regression analysis was used to examine the moderating role of racial/ethnic discrimination and cultural mistrust on the associations between language brokering frequency and depressive and social anxiety symptoms in 1,044 Latino and Asian American adolescents (57.5% female, Mage = 15.12 years, SD = 0.41). RESULTS: Findings indicated that brokering more frequently was associated with more depressive and social anxiety symptoms for youth who reported racial/ethnic discrimination from adults in school and more depressive symptoms for youth who had high levels of cultural mistrust. Differences in racial/ethnic groups were also explored. CONCLUSIONS: Our findings suggest that reports of racial/ethnic discrimination and perceptions of cultural mistrust exacerbate psychological challenges among Latino and Asian American adolescent language brokers and highlight the importance of further examining how discrimination influences the psychosocial development of brokering youth. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Same-race friendship preference across the middle school years: The role of school racial/ethnic context.

The current study examined the developmental trajectory of same-race friendship preference of racially/ethnically diverse students over the course of middle school. Participants were African American, Asian, Latinx, and White youth recruited at the start of middle school in 6th grade (N = 4,361; Mage = 11.33 years) and followed across the 3 years of middle school. School racial/ethnic diversity and the racial/ethnic representation of students in their academic classes, including honors classes, were examined as predictors of friendship preferences over time. Results from latent growth curve models revealed that same-race friendship preference increased over the course of middle school and was shaped by both the school and classroom racial/ethnic context, above and beyond availability. Greater school racial/ethnic diversity predicted steeper increases in same-race friendship preference over time for all racial/ethnic groups. However, there were interactions involving race/ethnicity when the analyses focused on how students were represented in their academic classes compared with school. African American and Asian youth who were underrepresented in honors classes showed steeper increases in same-race friendship preference over time. Implications for prejudice reduction and creating more inclusive school environments are discussed. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

School police officers' roles: The influence of social, developmental and historical contexts.

Amid national protests over police brutality, debates over law enforcement in schools have been reignited. Though research has focused on the consequences of police presence in schools, few studies have investigated the roles of school police officers (SPOs) and whether the larger contexts influence them. Using a bioecological framework (Bronfenbrenner and Morris, 2006), we examined how historical, social and developmental contexts shape SPOs' views of their roles and the challenges and opportunities they encounter. Nineteen 90-min focus groups with 45 SPOs from one large school police department were conducted. Analysis revealed that SPOs perceived their roles as multifaceted, encompassing both formal (e.g., law enforcer, educator) and informal (e.g., confidante, counselor) roles. These roles were enacted differently depending on the school level and neighborhood context. Furthermore, the challenges and opportunities SPOs reported were also contextualized emerging from changes in school policies, the rise in technology and social media and increased professionalization of their police department. Implications for theory and research as well as for training and policy are discussed.

How Racial/Ethnic Diversity in Urban Schools Shapes Intergroup Relations and Well-Being: Unpacking Intersectionality and Multiple Identities Perspectives.

Today's urban schools provide a unique intergroup context in which the students vary not only by race/ethnicity but also by the relative representation of their racial/ethnic groups. In two studies, we examined how this diversity aligns with intersectionality and multiple identities perspectives to affect the power and status associated with each group to shape intergroup dynamics. Study 1 focused on the perception of intergroup bias to investigate how perceived presence of same-race/ethnicity peers affects middle school students' intersectional intergroup attitudes based on race/ethnicity, gender, and sexual orientation. Middle school students (N = 1,107; Mage = 12.10; SD = 0.99) were randomly assigned to view Facebook-like profiles of peers that varied by gender (boy, girl), race/ethnicity (African American, Latinx), and sexual orientation (straight, lesbian, gay) and offered their first impressions as a way to assess various domains of intergroup attitudes. The perceived presence of same-race/ethnicity peers influenced intersectional intergroup attitudes, however, differentially so depending on stereotypes, prejudice, and behavioral tendencies. Study 2 focused on the experience of intergroup bias and simultaneously examined race, gender, and weight discrimination and its consequences among middle school students (N = 4,172; Mage = 13.5; SD = 0.87). Using latent profile analysis, five profiles of youth based on the pattern of perceived discrimination due to gender, race/ethnicity, and weight were identified. Being African American, Latinx, and male with a high body mass index (BMI) and few same-race/ethnicity peers at school predicted membership in a race profile, whereas being White or Asian with high BMI and more same-race/ethnicity peers predicted membership in a weight profile. Perceiving oneself as gender atypical was associated with all discrimination profiles.

Ethnicity, Peers, and Academic Achievement: Who Wants to be Friends with the Smart Kids?

Ethnic differences in peer reactions to academic achievement during adolescence has been a widely discussed but controversial issue in developmental and education research. Do peers respond positively or negatively to classmates of different ethnic groups who get good grades in school? The current study addressed this question by examining the linkage between academic achievement and friendship nominations received in an ethnically diverse sample of 4501 sixth grade students (Mage = 11.3 years; 51% female; 41.3% Latino, 25.1% White, 19.3% Asian, and 14.3% Black). The results of mediated moderation analyses showed that for Asians and Whites, higher academic achievement was associated with more same-ethnic friendships, whereas for Blacks and Latinos, higher academic achievement was associated with more cross-ethnic friendships. In addition, ethnic differences in the linkage between academic achievement and friendships were partly explained by classroom ethnic composition. Implications for promoting friendships of high achieving students both within and across ethnic boundaries were discussed.

Numerical Minority Status in Middle School and Racial/Ethnic Segregation in Academic Classes.

This study examined the effects of racial/ethnic segregation (i.e., overrepresentation) in academic classes on belonging, fairness, intergroup attitudes, and achievement across middle school (n = 4,361; MageT1 = 11.33 years), and whether effects depended on numerical minority status in school and race/ethnicity. Latent growth curve models revealed that experiencing more segregation than usual predicted less belonging and fairness than usual for all youth in the numerical minority, and greater in-group preference for numerical minority Whites. Academic classroom segregation throughout middle school predicted less steep declines in in-group preference for adolescents in the numerical minority, and declines in achievement for African American numerical minority youth. Results highlight the need to treat the racial/ethnic context as a structural and dynamic construct.

Meeting in the Middle: The Role of Mutual Biracial Friends in Cross-Race Friendships.

Social network analysis was used to examine the role of having a mutual biracial friend on cross-race friendship nominations among monoracial sixth-grade students (Mage  = 10.56 years) in two racially diverse middle schools (n = 385; n = 351). Monoracial youth were most likely to choose same-race peers as friends but more likely to choose biracial than different-race peers as friends, suggesting that racial homophily may operate in an incremental way to influence friendships. Monoracial different-race youth were also more likely to be friends if they had a mutual biracial friend. The findings shed light on the unique role that biracial youth play in diverse friendship networks. Implications for including biracial youth in studies of cross-race friendship are discussed.

Too tough at the top: Using latent class growth analysis to assess cool status during middle school.

INTRODUCTION: Obtaining and maintaining high social status in one's peer group is often a critical developmental goal during adolescence. The present study investigated factors that predict trajectories of cool status for middle school adolescents as well as how different cool status trajectories affect depressive symptoms. METHODS: The participants were 5,991 adolescents (52% girls) from 26 urban middle schools in California. Using latent class growth analysis, baseline assessment occurred in the fall of sixth grade, and repeated assessments occurred in the spring of sixth, seventh, and eighth grades. RESULTS: Three cool status trajectories were identified: (1) a high ascending cool status group (5% of the sample); (2) a decreasing cool status group (25%); and (3) a maintaining low cool status group (70%). Differences in the three groups were explained by GPA and having a reputation as aggressive at the beginning of middle school and the level of depression at the end of middle school. Those in the high ascending cool status group experienced the most depressive symptoms at the end of 8th grade. CONCLUSIONS: The findings suggest the need for a more nuanced perspective on maintaining cool status during adolescence that considers both its risks and benefits.

A Silver Lining: The Role of Ethnic Diversity on Co-Occurring Trajectories of Weight Status and Peer Victimization Across Early Adolescence.

PURPOSE: Although it is well-established that higher weight status youth are at greater risk of peer victimization, it is unknown how weight status and victimization develop concurrently; thus, the current study examined the co-occurrence of weight status and victimization trajectories across early adolescence. Furthermore, the role of ethnicity, including a novel measure of individual-level ethnic diversity exposure at school, was evaluated. METHODS: Participants included 5,991U.S. boys and girls (52% female; 32% Latino; 20% white; 14% East/Southeast Asian; 12% African-American/black) from 26 urban middle schools. Participants self-reported height and weight as well as peer victimization across four timepoints from sixth to eighth grade. Survey data was collected between 2009 and 2014. RESULTS: Growth mixture modeling identified five weight status groups (Low, Moderate, High, Decreasing, and Increasing) and four victimization groups (Low, High, Decreasing, and Increasing) trajectories. Parallel growth mixture modeling indicated that adolescents in the moderate weight status trajectory experienced the least amount of victimization; adolescents in the high weight status trajectory reported the highest levels of increasing and stable-high victimization. Moreover, higher weight status youth exposed to greater ethnic diversity at school were more likely to experience low victimization. CONCLUSIONS: The study highlights the importance of belonging to a normative weight status trajectory for experiencing low peer victimization, yet also shows the large variability in the victimization experiences of higher weight status youth. Greater exposure to ethnic diversity at school appears to play a significant role in offsetting risk of victimization among higher weight status adolescents.

Defending Victims of Bullying in Early Adolescence: A Multilevel Analysis.

Adolescents' defending behaviors in school bullying situations is likely determined by individual characteristics, social status variables, and classroom/school contextual factors operating simultaneously in the peer ecology. However, there is little research on defending behavior that utilizes this multilevel approach. This study investigated how students' willingness to defend victims of bullying was affected by feelings of empathy, perceived popularity, and classroom-level perceived prosocial norms. Participants were 1373 adolescents (40% girls, Mage: 14 yrs) from 54 classrooms in six middle schools in South Korea. These youth reported on their feelings of empathy and how prosocial they perceived their classmates to be. Peer-ratings and peer nominations were used to estimate defending behaviors and which students were perceived as popular. Multilevel analyses showed that participants were more likely to defend victims when they had greater empathy and perceived popularity and when classroom-level prosocial norms were higher. The findings have implications for interventions to reduce school bullying and for studying defending behavior in multiple cultural contexts.

Friends in Activities, School-related Affect, and Academic Outcomes in Diverse Middle Schools.

Participating in school-based activities is linked to positive academic engagement and achievement, but less is known about how peer relationships within activities affect these outcomes. The current study examined friends in extracurricular activities as a predictor of academic outcomes in multiethnic middle schools in California. Specifically, the mediating role of school belonging, and interactions by ethnicity and type of activity, were examined in a sample including African American or Black, East or Southeast Asian, White, and Latino youth in extracurricular activities (N = 2268; Mage = 13.36 in eighth grade; 54% female). The results of multilevel mediational models suggested that school belonging mediated the link between friends in activities and academic outcomes, and these findings replicated across groups based on ethnicity and the type of activity in which one was involved in general. These results are discussed in terms of how activities can be structured to promote positive peer relations in ways that are linked with academic engagement and achievement.

Mismatches in Self-Reported and Meta-Perceived Ethnic Identification across the High School Years.

Ethnic identification (i.e., one's self-reported ethnicity) is a social construction and therefore subject to misperceptions by others. When adolescents' self-views and others' perceptions are not aligned, adolescents may experience adjustment challenges. The present study examined mismatches between adolescents' ethnic identification (i.e., self-reported ethnicity) and meta-perceptions (i.e., what ethnicity they believed their schoolmates presumed them to be), as well as longitudinal associations between mismatches and adjustment across the high school years. Participants (Mage = 14.5; 57% girls) were an ethnically diverse sample of 1151 low-income high school students who had participated in an earlier longitudinal study during middle school. Although ethnic identification was largely consistent across the high school years, many students (46%) experienced at least occasional mismatches between their self-reported ethnic identification and meta-perceptions, with students who ever identified as multiethnic experiencing more mismatches than their monoethnic counterparts. Experiencing a mismatch was associated with more depressive symptoms, physical symptoms, and lower self-worth.

When and How Do Students Benefit From Ethnic Diversity in Middle School?

The effects of school-based ethnic diversity on student well-being and race-related views were examined during the first year in middle school. To capture the dynamic nature of ethnic exposure, diversity was assessed both at the school-level (n = 26) and based on academic course enrollments of African American, Asian, Latino, and White students (n = 4,302; M = 11.33 years). Across all four pan-ethnic groups, school-level ethnic diversity was associated with lower sense of vulnerability (i.e., feeling safer, less victimized, and less lonely) as well as perceptions of teachers' fair and equal treatment of ethnic groups and lower out-group distance. Underscoring the role of individual experiences, exposure to diversity in academic classes moderated the association between school-level diversity and the two aforementioned race-related views.

Multiracial in Middle School: The Influence of Classmates and Friends on Changes in Racial Self-Identification.

In the present research, the influence of racial diversity among classmates and friends on changes in racial self-identification among multiracial youth was examined (n = 5,209; Mage  = 10.56 years at the beginning of sixth grade). A novel individual-level measure of diversity among classmates based on participants' course schedules was utilized. The findings revealed that although there was some fluidity in multiracial identification at the beginning of middle school, changes in multiracial identification were more evident later in middle school. In addition, although diversity among classmates and friends both increased the likelihood of multiracial identification in the beginning of middle school, only diversity among friends mattered later in middle school, when fluidity in multiracial identification was at its peak.