Developmental Changes in the Priority of Perceived Status in Childhood and Adolescence

Association Between TikTok Use and Anxiety, Depression, and Sleepiness Among Adolescents: A Cross-Sectional Study in Greece

INTRODUCTION

TikTok use is increasing, especially among children and adolescents. However, the negative effects of TikTok use have not been sufficiently investigated.

AIM

To examine the association between TikTok use and anxiety, depression, and sleepiness in adolescents.

METHODS

We conducted a web-based cross-sectional study in Greece. We employed a convenience sample of 219 adolescents in Greece. All participants had a TikTok account. We used the TikTok Addiction Scale (TTAS) to measure TikTok use and the Patient Health Questionnaire-4 (PHQ-4) to measure anxiety and depression. We constructed multivariable regression models, and we performed a stratified analysis according to gender.

RESULTS

The mean age was 18.5 years (standard deviation: 0.5, range: 18 to 19). In our sample, 81.3% were girls and 18.7% were boys. Mean daily TikTok usage and TTAS scores were statistically higher for girls than for boys. Our multivariable linear regression analysis was adjusted for age and showed that problematic TikTok use was associated with higher levels of anxiety and depression symptoms in both genders. In particular, we found a positive association between mood modification and anxiety score (beta = 0.404, p-value = 0.006). Moreover, we found a positive association between conflict and depression score (beta = 0.472, p-value < 0.001). Additionally, we found that the impact of TikTok on anxiety and depression was greater among boys than girls. We also found that problematic TikTok use was associated with increased sleepiness in both genders (mood modification: beta = 0.655, p-value < 0.001; conflict: beta = 0.674, p-value < 0.001).

CONCLUSIONS

Our findings showed a positive association between TikTok use and anxiety, depression, and sleepiness. Early identification of problematic TikTok users is essential to promote their mental health and well-being. Healthcare professionals should be alert to recognize symptoms of problematic TikTok use.

Longitudinal Associations of (Un)popularity with Weight Perceptions and Dieting in Adolescence

Little is known about the unique effects of (un)popularity on body image and the characteristics influencing these effects. The goals of this study were to examine (1) the longitudinal associations of adolescents' (un)popularity with weight perception and dieting, (2) whether (dis)liking, self-esteem, and gender moderated these associations. Participants were 1697 Dutch adolescents (Mage = 14.18 years, SD = 1.29; 51% female), from a middle-class population. Participants completed peer nominations and self-reports in three consecutive school years. Mixed-effects models showed that (un)popularity did not predict weight perception and dieting over time. Concurrently, when liking was low, popularity predicted positive weight perception. Higher popularity predicted more dieting in females. This study highlighted that adolescents' body image varied in subgroups of social status.

Efficacy of Psycho-Educational Interventions on School Bullying in Social Isolation, Loneliness and PTSD Among Schoolchildren: A Systematic Review and Meta-Analysis

INTRODUCTION

Various antibullying strategies have emerged in the literature. To date, there is a dearth of the quality of evidence on the effectiveness of current antibullying programmes in reducing the sequelae of bullying. This critical appraisal examines the effectiveness of bullying in alleviating social isolation, loneliness and posttraumatic stress disorder (PTSD) among schoolchildren.

METHODS

This review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting guidelines. Several databases were searched, and inclusion and exclusion criteria were applied to the articles selected for inclusion.

RESULTS

Out of the 9537 articles initially identified and after assessing the eligibility of the studies, 22 articles were included in this systematic review, and 10 experimental studies were used for the meta-analysis. There was a significant (p = 0.015) and small standardized mean difference (SMD) (SMD = -0.132, 95% CI = -0.026 to -0.238) of the effect of psycho-educational programmes on social isolation among school children. Additionally, there was a significantly small SMD of the effect of psycho-educational programmes on loneliness among school students (SMD = -0.215, p = 0.049, 95% CI = -0.001 to -0.429). There were not enough publications to perform a meta-analysis of the effects of psycho-educational programmes on PTSD symptoms in school children.

CONCLUSIONS

Although psycho-educational interventions exhibit promise in mitigating social isolation and loneliness, additional research is required to comprehend their efficacy and comprehensively determine the optimal implementation strategies.

Combined Effects of Social Exclusion and Social Rank Feedback on Risky Decision-Making Across Adolescence

Adolescents' need to belong and concerns about social status are thought to increase risk-taking, however, not much is known about how feedback about social rank and the effects of social exclusion moderate risky decision-making. To this end, the present study examined how social rank feedback moderates the effects of social exclusion on risky decisions during adolescence. The experimental study included a total of 122 participants (11-19 years; 44% female). Participants were randomly assigned to receive either individual or social rank feedback in the Columbia Card Task after social inclusion and exclusion via the Cyberball paradigm. Contrary to expectations, social exclusion led to more cautious decision-making. Mid-adolescents were most influenced by the combination of social exclusion and social rank feedback, while late adolescents became more cautious with individual feedback. These findings suggest that peer influences also have adaptive effects, increasing sensitivity to risk information, with developmental differences in the role of social rank.

Is prior bullying victimization associated with subsequent bullying perpetration? A theoretical framework based on the Threat-Motivation model

INTRODUCTION

Bullying among adolescents is a global public health issue prevalent in schools, posing significant risks to positive adolescent development. Studies have shown that bullied adolescents tend to engage in more bullying perpetration, but this underlying process of longitudinal correlation has not been fully elucidated.

METHODS

Based on two waves of longitudinal data collected from 347 junior and 144 senior high school students in China (Mage = 13.66 years, SDage = 1.46, 59.27% boys) at 1-year intervals, two moderated chain-mediation models were used to explore the longitudinal correlations between bullying victimization and bullying perpetration and its underlying processes.

RESULTS

The results found a significant positive correlation between adolescents' bullying victimization experiences 1 year prior and bullying perpetration 1 year later. Furthermore, fear of negative evaluation and psychache played a longitudinal chain-mediating role in the process, with self-esteem and grade moderating this mediating pathway, either enhancing or weakening the effect.

CONCLUSIONS

This study demonstrates that prior bullying victimization is longitudinally and positively associated with subsequent bullying perpetration among adolescents. This process is mediated by fear of negative evaluation and psychache, with self-esteem and grade level as moderators. Based on these conclusions, we have formulated the Threat-Motivation Model, offering a framework to understand the relationship between bullying victimization and bullying perpetration. Practical implications, including strategies to reduce bullying in youth groups, are discussed.

Adolescent psychopathic traits and adverse environments: Associations with socially adaptive outcomes

Researchers have suggested that psychopathic traits among adults may be, at least in part, an adaptive and/or a learned response for securing socially adaptive outcomes in adverse environments, but there is a lack of developmental evidence supporting this hypothesis among adolescents. Therefore, we examined the indirect links from self-perceived adverse environments (parental neglect, socioeconomic status, school competition, neighborhood violence) to evolutionarily relevant social outcomes (social power, dating behavior) through psychopathic traits. A community sample of 396 adolescents completed measures for the study (Mage = 14.64, SD = 1.52). As predicted, there were significant indirect effects from higher levels of parental neglect, school competition, and neighborhood violence to both forms of socially adaptive outcomes through psychopathic traits, but unexpectedly, there were no indirect effects with socioeconomic status. There were also direct effects between environment and socially adaptive outcomes. Results support the hypothesis that psychopathic traits may be, in part, an adaptive and/or learned response to cues from adverse social environments as a means to acquire evolutionarily relevant social outcomes. Interventions could be designed to target the adverse social issues that might be facilitating the development of psychopathy and should be sensitive to the social outcomes adolescents may acquire from these traits.

Emotion regulation motives in adolescence shape regulatory strategy use

INTRODUCTION

Emotion regulation (ER) motives (i.e., the reasons individuals regulate their emotions) are key factors influencing the development of adolescents' ER abilities. However, age- and gender-related trends in adolescents' ER motives, as well as their impact on the use of ER strategies, remain unclear.

METHODS

We recruited 5629 participants from two schools in Southwest China (M = 15.18, SD = 1.73; 45.11% male) to complete the Emotion Regulation Goals Scale and the Emotion Regulation Questionnaire. Linear and polynomial regression analyses were conducted to examine age- and gender-related differences in ER motive patterns. We then tested whether different patterns of ER motives were also associated with participants' habitual use of two common ER strategies.

RESULTS

This study revealed nonlinear and diverse age-related differences in adolescents' contra-hedonic and pro-social motives, with notable fluctuations in contra-hedonic motives. Boys exhibited higher levels of contra-hedonic motives, while girls showed higher levels of performance motives. Moreover, ER motives were significantly and broadly associated with individuals' habitual use of reappraisal and suppression. More specifically, pro-hedonic motives were associated with greater use of reappraisal, while contra-hedonic motives were linked to higher levels of suppression. Furthermore, instrumental motives (i.e., performance, pro-social, and impression management) were positively related to both reappraisal and suppression.

CONCLUSIONS

These findings enhance our understanding of how adolescents' ER motives vary by age and gender, as well as the crucial role different ER motives play in shaping patterns of ER strategy use.

Developmental trajectories of students' beliefs about social success: Differences between students with and without a middle school transition

INTRODUCTION

Attaining social success is a significant concern during early adolescence. The characteristics that youth believe will bring social success are known to change over time and vary across contexts, especially over the transition to middle school.

METHODS

The analytic sample included 614 students (52% girls, 48% boys; 53% Black, 47% White) from the Midwestern United States. At yearly intervals during grades 6-8, participants completed self-report surveys assessing their endorsement of five characteristics (sincerity, academic responsibility, dominance, disingenuity, athleticism/attractiveness) that described peers in their grade who have lots of friends and get along well with others (i.e., social success). The sample included students who attended the same school from kindergarten-eighth grade (K8) and students who made a transition from an elementary to a middle school after 6th grade (ESMS).

RESULTS

Multigroup longitudinal growth models revealed some concerning trends over time. For both ESMS and K8 students, their endorsement of sincerity decreased, their endorsement of disingenuity increased, and their endorsement of athleticism/attractiveness was high and stable. ESMS students' endorsement of academic responsibility decreased over time and their endorsement of dominance showed increasing trends. K8 students' endorsements of academic responsibility and dominance were stable. However, across contexts, compared to the other characteristics, sincerity was most often ranked the highest.

CONCLUSIONS

The findings highlight that some changes in students' beliefs about social success may be unique to students who experience a school transition whereas others may be developmentally normative. Implications for the education of young adolescent students are discussed.

Admitting to bullying others or denying it: Differences in children's psychosocial adjustment and implications for intervention

This study examined whether, for bullying perpetrators, admitting to their behavior was associated with specific psychosocial characteristics, and whether it predicted decreases in bullying behavior and a higher responsiveness to a successful anti-bullying program after 9 months of implementation. It also investigated whether participation in an anti-bullying program deterred admitting to the behavior. At pretest, our sample included 5,908 children and early adolescents (M age: 11.2 years) in 39 intervention and 38 control schools; among them, 1,304 were peer-identified bullying perpetrators (scoring higher or equal to 0.5 SD above the same-sex classroom mean). Regression analyses indicated that peer-identified bullying perpetrators who admitted to their behavior were more likely to suffer from internalizing problems and reported lower anti-bullying attitudes than those who did not admit to bullying others. There was no significant main effect of admitting to bullying on changes in peer-reported bullying 1 year later. However, in control schools only, those who admitted to bullying at pretest were more likely to continue bullying a year later than those who denied it. There was no evidence that participating in the anti-bullying program made it less likely for peer-identified bullying perpetrators to admit to their behavior.

Student's and Classmates' Prosocial Behavior predict Academic Engagement in Middle School

Students' academic engagement is greatly informed by a classroom's social climate. However, more research is needed regarding how specific peer behavior, especially prosocial behavior, come to shape academic engagement. The present study investigated whether students' perceptions about their classmates' prosocial behavior were associated with their academic engagement (cognitive, behavioral, affective) across the school year. Indirect effects via increases in students' own prosocial behavior were examined. Participants were 905 middle school students from rural, low-income communities in the Midwestern United States (50% girls, 46% boys; Mage = 12.94 years). Students completed self-report surveys in the fall and spring of the 2022-2023 school year. Results revealed that students' perceptions of their classmates' prosocial behavior were positively associated with students' own prosocial behavior. Students' own prosocial behavior was positively associated with all three dimensions of engagement. The positive indirect effect of classmates' prosocial behavior on engagement through students' own prosocial behavior was significant. The findings highlight the importance of classmates' behavior on individuals' academic engagement and offer insights into classroom-based interventions aimed at improving collective behavior.

How peer status and ability track shape behavioral disengagement over the transition from primary to secondary school

The transition from primary to secondary school is often associated with an increase in behavioral disengagement, which undermines students' academic development. Prior studies examined the average development of behavioral disengagement across school transitions. This study examined how students' peer status in primary school and ability track in secondary school relate to trajectories of behavioral disengagement. We followed n = 1564 students who transitioned to secondary school across three time points: February/March, and May/June in students' final year of primary school and January/February, roughly 6 months after students transited to secondary school. Latent Growth Curve Analyses showed that on average, behavioral disengagement increased, but this increase mostly occurred before transitioning to secondary school. Peer status and track related to students' initial levels of behavioral disengagement, but not to their development in behavioral disengagement over the transition. Specifically, students who were viewed as more popular by peers, and students who ended up in the lowest track showed more behavioral disengagement in primary school, whereas students who were more accepted by peers were less disengaged in primary school.

Emotional and relational problems of adolescents with and without a migrant background in Europe: a systematic review

Mental health of migrant adolescents is a topic that has been widely studied in the past decades. Emotional and behavioural problems are amongst the most explored areas; however, little attention has been paid to the relational sphere, which represents another key aspect of mental health and is paramount during adolescence. This systematic review analysed the available evidence on emotional and relational problems comparing adolescents with and without a migrant background in Europe between 2010 and 2021. The search was conducted in four databases using a common search strategy composed of terms addressing adolescence, migrant population, and emotional and relational problems. Three rounds of screening produced 36 eligible studies. Factors affecting both types of problems were identified and categorised using thematic synthesis, dividing them into factors affecting both types of problems jointly or separately and analysing them according to three systemic levels affecting the adolescents' lives (intrapersonal, interpersonal and external). Critical analysis of the results pointed to mixed findings, with a mild tendency in migrant-background adolescents to portray more emotional problems than their native peers and a stronger tendency for relational problems in the same direction. Several limitations were identified and, along with the conclusions, point to suggestions for future research focusing on studying relational problems as a key component of mental health and its link to emotional problems. Further suggestions entail designing studies that target adolescents with different migrant-background profiles and cultural origins to establish differences between them and identify additional factors affecting emotional and relational problems during the pre-migration and transit phases of the migratory journey to help prevent the onset of these problems.

The Social Failure Model: Do Classroom Norms Play a Role in the Development of Antisocial Behavior and Depressive Symptoms?

This study examined the moderating role of descriptive and status norms in the stability of youth's antisocial behavior, and the link between initial antisocial behavior and the development of depressive symptoms over the course of one academic year, while controlling for initial depression levels. A total of 1081 students (51.06% girls; grades 4 through 6) in schools in low to average socio-economic status neighborhoods completed self-reports and a peer nomination inventory in the fall (T1) and spring (T2) of one year. Descriptive norms were operationalized as the classroom- and sex-specific mean level of antisocial behavior. Status norms were operationalized as the classroom- and sex-specific correlation between antisocial behavior and social preference. Descriptive norms moderated the link between T1 and T2 antisocial behavior, such that youth exhibiting high levels of antisocial behavior showed a greater increase in antisocial behavior in classrooms where descriptive norms strongly favored such behavior (i.e., + 1 SD) than in classrooms with neutral or weak descriptive norms (i.e., - 1 SD). Status norms moderated the association between T1 antisocial behavior and T2 depressive symptoms, such that youth with high levels of antisocial behavior had higher depressive symptoms in classrooms where status norms disfavored antisocial behavior than in classrooms with neutral or favorable norms. No moderating effects of sex or grade were observed. These results suggest that both descriptive norms and status norms play important, albeit distinct, roles in exacerbating youth's depressive symptoms and antisocial behavior, but they may also mitigate these same outcomes in favorable contexts.

The interplay between popularity and aggression in adolescence: Focusing the lens on sense of power and prestige

There is accumulating longitudinal evidence that popularity predicts relative increases in adolescents' aggression. Yet, we know very little about the conditions that motivate popular youth to engage in coercive behaviors. In this study, we evaluated whether popular adolescents would show elevated levels of aggression over time when they felt powerless and had low prestige (respect and admiration) among their peers. In addition, we examined whether popular youth would gain a greater sense of power and prestige over time via aggressive means. Participants were 419 fifth (MagetT1 = 10.91 years, SD = 0.42) and eighth graders (MagetT1 = 13.95 years, SD = 0.43) who participated twice over a 1-year interval. Popularity was measured at Time 1, while the other central constructs, such as direct forms of aggression, sense of power and prestige, were assessed at Times 1 and 2. Our findings demonstrate that aggression might be a threat-triggered response by popular youth to protect their ego and/or resolve the discrepancy between their position in the hierarchy and what that role should afford them. Moreover, popular youth feel the greatest sense of power over time when they abstain from resorting to aggressive means. Implications and directions for future research are discussed.

Global, regional, and national burden of bullying related mental disorders of adolescent from 1990 to 2019: A systematic analysis for the Global Burden of Disease Study 2019

Few studies have assessed the burden of mental disorders in adolescents related to bullying victimization at the global, regional, and national levels. We analyzed adolescent mental disorder disability-adjusted life years (DALYs) attributed to bullying in 204 countries, following the Global Burden of Disease study 2019 framework. The DALYs rate of adolescent for bullying-related mental disorders global increased from 110.45 (95 % uncertainty intervals (UI): 40.76, 218.62) per 100,000 in 1990 to 138.92 (95 % UI: 54.37, 268.19) per 100,000 in 2019. The largest increase in DALYs rates were obvious in low-SDI and high-SDI regions. In 2019, the DALYs rate of adolescents with bullying-related anxiety disorders was 1.4 times higher than those depressive disorders; the DALYs rate of adolescents with bullying-related mental disorder in females was 1.3 times higher than that of male, and older adolescent (15-19 years old) was 1.4 times higher than younger adolescent (10-14 years old). High-income North America had the fastest increase in DALYs rates of mental disorders related to bullying. In general, a positive correlation was observed between bullying DALY rate of adolescent and SDIs at the regional and national levels. Our study highlights significant disparities in adolescent mental health burden from bullying. Governments must implement adaptive policies to address diverse needs effectively.

The role of core self-evaluation between peer victimization and depression: A longitudinal multilevel moderated mediation model and the healthy context paradox in Chinese adolescents

BACKGROUND

According to the healthy context paradox, the negative effects of peer victimization on core self-evaluation and depressive symptoms may vary in different levels of classroom-level victimization. However, previous studies have not investigated this issue using a longitudinal study design.

OBJECTIVE

The present study used a longitudinal design to examine why and under what conditions peer victimization was associated with adolescents' depressive symptoms.

METHOD

A large number of Chinese adolescents (Time 1: N = 4164, 50.3 % girls, Mage = 12.89, SDage = 0.77; Time 2: N = 4001, 50.4 % girls, Mage = 14.39, SDage = 0.75) were followed for one and a half years.

RESULTS

Results showed that adolescents who were victimized in healthy contexts were more depressed and were at an increased risk of reporting more negative core self-evaluation than those victimized in unhealthy contexts. Moreover, core self-evaluation served as a mediator between peer victimization and depressive symptoms.

LIMITATIONS

This study included two waves of data, which limited the exploration of dynamic relationships between peer victimization and depressive symptoms. In addition, the self-reported data weakened the objectivity of the results. Finally, this study neglected the effects of different dimensions of peer victimization on depressive symptoms.

CONCLUSIONS

The healthy context paradox of peer victimization is identified in China, highlighting that future interventions of peer victimization should pay more attention to specific remaining victimized and self-devaluing individuals in healthy contexts.

Self-ratings and peer-ratings of bullying perpetrators: Intrapersonal and interpersonal factors that differentiate bully subgroups

Using a large sample of students (N = 1373; 40% girls; Mage = 14 years) from 54 classrooms in South Korea, this study identified subtypes of bullies based on specific combinations of self-reports and peer-reports and examined the intrapersonal and interpersonal factors that explain the differences in characteristics between these identified groups. Latent profile analysis identified four subgroups of bullies: (a) non-bullies (59.5%), (b) peer-identified bullies (21%), (c) self-identified bullies (9.8%), and (d) self/peer-identified bullies (9.7%). Multinomial logistic hierarchical analysis revealed significant differences between the bully subgroups on the four intrapersonal factors (i.e., anti-bullying attitudes, perception of teachers' reaction to bullying, delinquent behavior, and depression; odds ratios [OR] ranged from 0.24 to 3.13) and three of the four interpersonal factors (i.e., overestimated popularity, rejection, and victimization; ORs ranged from 0.39 to 2.26). More specifically, compared to the peer-identified bully group, the non-bully and self/peer-identified bully groups showed opposite patterns of anti-bullying attitudes, delinquent behavior, and peer status (ORs ranged from 0.46 to 3.13). Relative to the peer-identified bully group, the self-identified bully group was more likely to exhibit depressive symptoms and perceive themselves as being victimized, was less likely to endorse anti-bullying attitudes, and had a less positive perception of teacher's reaction to bullying (ORs ranged from 0.24 to 1.40). Gender differences emerged as well. Implications for optimizing the screening of bullying perpetrators and anti-bullying interventions are discussed.

Wanting to matter and learning to care: A neurodevelopmental window of opportunity for (Pro) social learning?

Wanting to matter-to feel socially recognized, appreciated, and capable of actions that benefit others-represents a fundamental motivation in human development. The motivational salience of mattering appears to increase in adolescence. Evidence suggests this is related to pubertal increases in the incentive salience for gaining social value and personal agency. This can provide a useful heuristic for understanding motivational proclivities (i.e. wanting to matter) that influence action-outcome learning as young adolescents are exploring and learning how to navigate increasingly complex social and relational environments. Adolescence also brings new capacities, motives, and opportunities for learning to care about and contribute to the benefit of others. Together, these create a window of opportunity: a sensitive period for learning to gain salient feelings of mattering through caring prosocial actions and valued societal contributions. Successfully discovering ways of mattering by doing things that matter to others may contribute to formative socio-emotional learning about self/other. Advances in understanding these social and relational learning processes and their neurodevelopmental underpinnings can inform strategies to improve developmental trajectories of social competence and wellbeing among adolescents growing up in a rapidly changing and increasingly techno-centric world.

A framework for integrating neural development and social networks in adolescence

Adolescence is a developmental period characterized by increasingly complex and influential peer contexts. Concurrently, developmental changes in neural circuits, particularly those related to social cognition, affective salience, and cognitive control, contribute to individuals' social interactions and behaviors. However, while adolescents' behaviors and overall outcomes are influenced by the entirety of their social environments, insights from developmental and social neuroscience often come from studies of individual relationships or specific social actors. By capturing information about both adolescents' individual relations and their larger social contexts, social network analysis offers a powerful opportunity to enhance our understanding of how social factors interact with adolescent development. In this review, we highlight the relevant features of adolescent social and neural development that should be considered when integrating social network analysis and neuroimaging methods. We focus on broad themes of adolescent development, including identity formation, peer sensitivity, and the pursuit of social goals, that serve as potential mechanisms for the relations between neural processes and social network features. With these factors in mind, we review the current research and propose future applications of these methods and theories.

Standard Deviation vs. Gini Coefficient: Effects of Different Indicators of Classroom Status Hierarchy on Bullying Behavior

Classroom status hierarchy (the degree to which popularity is unequally distributed in a classroom) has often been examined as a predictor of bullying. Although most research has relied on an operationalization of status hierarchy as the classroom standard deviation (SD) of popularity, other fields (e.g., sociology, economics) have typically measured resource inequality using the Gini coefficient. This multilevel study examines the concurrent and prospective associations of both status hierarchy indicators (referred to as SD-hierarchy and Gini-hierarchy) with peer-reported bullying, controlling for key variables (i.e., the structure of the classroom status hierarchy, average classroom level of popularity). The final sample included 3017 students (45.3% self-identified as a boy; T1 Mage = 13.04, SD = 1.73, approximately 93% born in Finland) from 209 classrooms. Concurrently, classroom SD-hierarchy was positively, linearly associated with bullying, whereas there was a curvilinear (inverted U) association between Gini-hierarchy and bullying. No significant longitudinal associations were found. The findings suggest that Gini-hierarchy provides unique information beyond the SD-hierarchy.

The new social landscape: Relationships among social media use, social skills, and offline friendships from age 10-18 years

Social media has created a new social landscape for adolescents. Knowledge is needed on how this landscape shapes adolescents' social skills and time spent with friends, as these outcomes are important to mental health and psychosocial functioning. Using five waves of biennially collected data from a birth cohort assessed throughout age 10-18 years (n = 812), we found that increased social media use predicted more time with friends offline but was unrelated to future changes in social skills. Age and sex did not moderate these associations but increased social media use predicted declined social skills among those high in social anxiety symptoms. The findings suggest that social media use may neither harm nor benefit the development of social skills and may promote, rather than displace, offline interaction with friends during adolescence. However, increased social media use may pose a risk for reduced social skills in socially anxious individuals.

Being on top versus not dangling at the bottom: Popularity motivation and aggression in youth

Whereas research on aggression and status motivation in youth has predominantly looked at a promotion focus (striving for popularity), a prevention focus (wanting to avoid low popularity) could also be an important determinant of aggression, as youth who fear low popularity may use strategic aggression to secure their position. The aim of the current study was to develop reliable measures for both popularity motivations, and examine how both motivations are uniquely and jointly related to aggression. Participants were 1123 Dutch secondary school students (M age = 14.4 years, 48% girls), who completed a 3-item measure of striving for high popularity based on existing questionnaires (Li & Wright, 2014; Ojanen et al., 2005), and a 3-item measure of avoiding low popularity consisting of an adapted version of the high popularity items. Aggressive behavior was measured through peer nominations. Motivations were moderately correlated (r = .51), but did not always co-occur within the same person, as 17% of the sample belonged to a cluster that scored low on striving for popularity, but moderately high on avoiding low popularity. When considered simultaneously, striving for high popularity was not related to any type of aggression, whereas avoiding affiliation with unpopular peers was related to strategic aggression. For physical and verbal aggression, gossiping, excluding and bullying, the association of avoiding low popularity with aggression was strongest when youth also strived for high popularity. Future work should take both popularity motivations into account to better understand, predict and intervene on youth's aggression toward peers.

"A 'Cool' Kid Wears a Brand, and Everyone's following Him" Hierarchal Social Status in Preadolescence: A New Developmental Perspective

Inequality in hierarchical social status, especially among socially excluded children, profoundly affects preadolescents. Historically viewed through a lens of psychopathology and moral deficiencies, it challenges the education system's approaches and interventions. This article introduces a developmental perspective, highlighting the hierarchical social status' role in shaping classroom cohesion, strength, and distinctiveness. This study's phenomenological, qualitative methodology aimed to gain preliminary insight into the children's perspectives. Drawing from 12 focus group discussions involving 140 latency-age (grade 5) children in Israel, it uniquely reveals the dynamic nature of hierarchical social status influenced by children's connections with the group. This dynamism promotes group unity, strengthens bonds, and prioritizes collective concerns, contributing to the development of a "social self" in the latency phase. Beyond theory, this study proposes innovative interventions to address social status disparities.

Reciprocal Links Between Friendship Quality and Peer Victimization Among Middle Adolescents

There is a robust association between friendship quality and victimization in adolescence; yet, it remains unclear whether friendship quality may be linked causally with different forms of victimization in middle adolescence. To fill this gap, this study examines the bidirectional associations of friendship quality and relational/verbal victimization with data collected at two time points, 6 months apart, in a sample of 671 middle Chinese adolescents (Mage = 15.63, SDage = 0.73, 49% males). Cross-lagged panel analyses revealed a two-way relationship between friendship quality and victimization, which existed in both verbal and relational victimization. Multi-group panel analyses observed that the cross-lagged associations between friendship quality and relational/verbal victimization were only found for males, but not for females. This result suggests that adolescent males' victimization is both affected by and a predictor of friendship quality, with implications for youth prevention programs.

Peer Influences on (Dis)Engagement in Early Adolescence: the Role of Friendship, Social Status, and Academic Status

Academic engagement in adolescence is shaped by influences from the peer environment, yet the types of peers impacting engagement remain unclear. This study explores the roles of friends, popular students, and intelligent students in shaping peers' behavioral and emotional (dis)engagement. Data were analyzed from 3409 Flemish eighth-grade students (Mage = 13.48 years, SD = 0.46, 50.09% female), utilizing self-reports and peer nominations to measure (dis)engagement and map friendship, popularity, and intelligence networks in the fall and spring. Longitudinal network analysis revealed that, while accounting for selection and network structure, friends influenced all dimensions of engagement. Popular students influenced emotional disengagement, and intelligent students impacted emotional engagement. These findings underscore the intricate nature of peer dynamics, highlighting the need for a multidimensional approach to studying peer influences on engagement.

Is Bullying Always about Status? Status Goals, Forms of Bullying, Popularity and Peer Rejection during Adolescence

Bullying has been associated with status goals among peers, but this research has not distinguished among forms of bullying, nor included actual status or popularity among peers in an integrated analysis. To this aim, in concurrent correlational data, we examined adolescent status goals as predictors of peer-reported physical, verbal, exclusionary and electronic bullying, and these further as predictors of popularity and peer rejection (N = 256; 67.2% girls; M age = 12.2 years). We also explored potential indirect associations of status goals with popularity and peer rejection via forms of bullying. The findings indicated that verbal bullying was the most common form of bullying. Status goals were positively related to all but physical bullying, yet only verbal bullying partially mediated this association with popularity. Electronic bullying was unrelated to popularity and peer rejection, when controlling for other bullying forms (but was positively related to rejection at the bi-variate level). The findings underscore the importance of assessing bullying as a heterogeneous construct, as related goals and adjustment among peers may depend on its specific form.

Bullying Victimization and Adolescent Depression, Anxiety and Stress: The Mediation of Cognitive Emotion Regulation

BACKGROUND

Existing research has revealed a robust association between bullying victimization and psychological distress, but less is known about the underlying mechanism of this link. cognitive emotion regulation (CER) strategies could be a potential mediator. The current study examined the role of functional and dysfunctional CER strategies as potential mediators of the association between bullying victimization and depression, anxiety, and stress symptoms among 638 high school students (53.9% boys; Mean age = 15.65, SD = 1.32).

METHOD

Participants completed a series of questionnaires assessing bullying victimization (Olweus Bully/Victim Questionnaire), CER strategies (CERQ-18), and symptoms of depression, anxiety, and stress (DASS-21). The indirect relationships between bullying victimization and psychopathological symptoms via functional and dysfunctional CER strategies were tested through structural equation modeling.

RESULTS

Dysfunctional CER strategies mediated the impact of bullying victimization on depression, anxiety, and stress. In contrast, bullying victimization did not significantly influence functional CER strategies.

CONCLUSIONS

The findings provide additional support for the detrimental role of bullying victimization on mental distress, also suggesting that this effect is not only direct, but indirect is well. These results are particularly relevant in light of the absence of mediation by protective factors such as the use of positive emotion regulation strategies.

Effect of school lockdown due to the COVID-19 pandemic on screen time among adolescents in Hungary: a longitudinal analysis

Introduction

Studies indicate that due to school lockdown during the Coronavirus Disease 2019 (COVID-19) pandemic, screen time increased more steeply than pre-pandemic years. The aim of our study was to examine changes in screen time and its components (screen time spent on videos, games, homework, and other activities) of adolescents affected by COVID-19 school closures compared to controls from pre-pandemic years and to assess the effect of family structure and family communication.

Methods

Two sets of ninth-grader boys and girls transitioning into 10th grade were included in the analysis. The 'pre-COVID classes' (controls) completed the baseline survey in February 2018 and the follow-up survey in March 2019. 'COVID classes' (cases) completed the baseline survey in February 2020 (1 month before the COVID-19-related school lockdowns) and the follow-up survey in March 2021. Linear mixed models stratified by sex were built to assess the change in screen time over one year adjusted for family structure and communication.

Results

Our study population consisted of 227 controls (128 girls, 99 boys) and 240 cases (118 girls, 122 boys). Without COVID-19, overall screen time did not change significantly for boys, but there was a decrease in screen time for gaming by 0.63 h, which was accompanied by an increase of 1.11 h in screen time for other activities (consisting mainly of social media and communication). Because of the pandemic, all components increased by 1.44-2.24 h in boys. Girls' screen time and its components remained stable without school lockdown, while it increased for videos and homework by 1.66-2.10 h because of school lockdown. Living in a single-parent household was associated with higher, while better family communication resulted in lower screen time.

Discussion

Our results indicate that COVID-19-related school lockdowns modified the age-specific increase in screen time for boys and girls as well. This trend, however, may be counterbalanced by improving communication between family members.

Identifying who adolescents prefer as source of information within their social network

Adolescents are highly influenced by their peers within their social networks. This social influence can stem from both unsolicited peer pressure and the active search for guidance. While extensive research examined the mechanisms of peer pressure, little is known about who adolescents prefer as a source of information. To address this gap, we conducted two independent studies using a novel social search paradigm that allows participants to choose which social sources they wish to observe. In both studies, adolescents demonstrated a preference for their friends over non-friends, as well as for peers who were perceived as trustworthy. Across both studies, we found mixed evidence for the role of perceived popularity as a selection criterion. Notable, study 2 revealed the significance of "cool", "admirable" and "acting mean" as additional characteristics of preferred peers, traits that are often associated with elevated peer status. It also revealed an interest for peers perceived as being smart. These findings highlight the active role adolescents have in choosing social sources and emphasize the importance of multiple peer characteristics. Future research should investigate whether adolescents' interest in these types of peers is contingent upon specific social contexts, age groups, and peer cultures.

Neural tracking of social hierarchies in adolescents' real-world social networks

In the current study, we combined sociometric nominations and neuroimaging techniques to examine adolescents' neural tracking of peers from their real-world social network that varied in social preferences and popularity. Adolescent participants from an entire school district (N = 873) completed peer sociometric nominations of their grade at school, and a subset of participants (N = 117, Mage = 13.59 years) completed a neuroimaging task in which they viewed peer faces from their social networks. We revealed two neural processes by which adolescents track social preference: (1) the fusiform face area, an important region for early visual perception and social categorization, simultaneously represented both peers high in social preference and low in social preference; (2) the dorsolateral prefrontal cortex (DLPFC), which was differentially engaged in tracking peers high and low in social preference. No regions specifically tracked peers high in popularity and only the inferior parietal lobe, temporoparietal junction, midcingulate cortex and insula were involved in tracking unpopular peers. This is the first study to examine the neural circuits that support adolescents' perception of peer-based social networks. These findings identify the neural processes that allow youths to spontaneously keep track of peers' social value within their social network.

Adolescents' neural sensitivity to high and low popularity: Longitudinal links to risk-taking and prosocial behavior

Adolescents are particularly attuned to popularity within peer groups, which impacts behaviors such as risk-taking and prosocial behavior. Neurodevelopmental changes orient adolescents toward salient social cues in their environment. We examined whether neural regions that track popularity are associated with longitudinal changes in risk-taking and prosocial behavior. During an fMRI scan, adolescents (n = 109, Mage=13.59, SD=0.59) viewed pictures of their popular and unpopular classmates based on sociometric nominations from their social networks. Neural tracking of high popularity in the dorsomedial prefrontal cortex was associated with increases in risk-taking behavior, whereas tracking of low popularity in the right insula was associated with increases in prosocial behavior. Results suggest that individual differences in neural tracking of popularity relate to longitudinal changes in adolescents' social behaviors.

Chronic, increasing, and decreasing peer victimization trajectories and the development of externalizing and internalizing problems in middle childhood

Children's peer victimization trajectories and their longitudinal associations with externalizing and internalizing problems were investigated from Grades 2 to 5. Secondary data analysis was performed with the Early Childhood Longitudinal Study (ECLS-K-2011; n = 13,860, M age = 8.1 years old in the spring of Grade 2; 51.1% male, 46.7% White, 13.2% African-American, 25.3% Hispanic or Latino, 8.5% Asian, and 6.1% other or biracial). Children who experienced high and persistent levels of peer victimization (high-chronic victims) exhibited co-occurring externalizing and internalizing problems. Moreover, among high-chronic victims, boys had a more pronounced increase in their externalizing trajectories, and girls had greater increases in their social anxiety trajectories. In contrast, those with decreasing peer victimization across time exhibited signs of recovery, particularly with respect to their social anxiety. These findings elucidated how chronic, increasing, and decreasing victims exhibited distinct patterns in the co-occurring development of their externalizing and internalizing problems, and how findings varied depending on the form of problem behavior and by child sex.

Anxious-Withdrawal and Sleep Problems during Adolescence: The Moderating Role of Peer Difficulties

Anxious-withdrawal is a well-established individual risk factor for psychosocial difficulties during adolescence. It is unknown, however, whether it also places youth at increased risk for physical health problems, such as sleep difficulties. This study examines the concurrent and prospective associations between anxious-withdrawal and six types of sleep difficulties (i.e., sleeping too much, sleeping too little, talking/walking in sleep, being overtired, nightmares, and general trouble sleeping). We further evaluate whether these associations differ for adolescents who are high versus low in exclusion and victimization. The participants were 395 adolescents (Mage = 13.61 years; 35% ethnic minority) who completed peer nominations of anxious-withdrawal, exclusion, and victimization at Time 1 (T1). Their mothers completed reports of sleep difficulties at T1 and at Time 2 (T2). Path analyses revealed unique associations between anxious-withdrawal and several types of sleep difficulties (e.g., sleeping too much) at T1. Analyses also revealed a significant interaction effect between T1 anxious-withdrawal and exclusion/victimization such that anxious-withdrawal was prospectively associated with trouble sleeping only for those young adolescents who are highly excluded/victimized. Our findings are the first to link anxious-withdrawal to a physical health outcome in adolescence and point to the need for future research to not only examine anxious-withdrawal and physical health but also to include assessments of peer difficulties.

Does defending affect adolescents' peer status, or vice versa? Testing the moderating effects of empathy, gender, and anti-bullying norms

This study examined bidirectional associations between students' bully-directed defending behavior and their peer status (being liked or popular) and tested for the moderating role of empathy, gender, and classroom anti-bullying norms. Three waves of data were collected at 4-5-month time intervals among 3680 Finnish adolescents (Mage  = 13.94, 53.0% girls). Cross-lagged panel analyses showed that defending positively predicted popularity and, to a larger degree, being liked over time. No moderating effect of empathy was found. Popularity was more strongly predictive of defending, and defending was more strongly predictive of status among girls than among boys. Moreover, the positive effects of both types of status on defending were-albeit to a limited extent-stronger in classrooms with higher anti-bullying norms.

Effects of the KiVa anti-bullying program on defending behavior: Investigating individual-level mechanisms of change

Given that defending victimized peers might help discourage bullying behavior and prevent its harmful consequences, various anti-bullying programs have attempted to increase defending behavior among participating children. However, the cognitions that underlie the effectiveness of interventions in increasing defending remain unknown. Data for this randomized controlled trial (RCT) of the KiVa anti-bullying program were collected in Finnish primary schools at baseline, after 5 months of implementation, and after 9 months of implementation and were used to examine the possible mediating role of seven psychological factors (empathy for the victim, feelings of responsibility to intervene, self-efficacy for defending, negative attitudes towards victims, and outcome expectations that defending would decrease or stop the bullying, be beneficial for one's status, and not increase one's risk of being victimized). Analyses conducted on a sample of 5731 children (baseline M_age = 11 years; 51% girls) revealed that the positive effects of KiVa on defending behavior after 9 months of implementation could partly be explained by the positive effects of the program on two factors (i.e., feelings of responsibility to intervene and expectations that the defending would make the bullying decrease or stop) after 5 months of implementation. This study provides information regarding the individual-level factors that anti-bullying interventions can target to successfully promote defending of victimized peers in primary schools.

Does Being Prosocial Pay Off? Testing Positive Developmental Cascades of Prosocial Behavior, Social Preference, and Subjective Well-Being in Chinese Adolescents

Positive aspects of adolescent development recently have raised researchers' interests; however, studies examining reciprocal links between prosocial behavior, social preference, and subjective well-being are lacking. The present longitudinal study investigated the bidirectional relations between prosocial behavior, social preference, and subjective well-being within a theoretical framework of the developmental cascade model. A total of 1248 Chinese adolescents (M = 13.44, SD = 0.65; 47.0% girls) were surveyed across three waves with 6-month intervals. The results of analyses utilizing the random-intercept cross-lagged panel model demonstrated that prosocial behavior was positively associated with both social preference and subjective well-being, and social preference was not associated with subjective well-being at the between-person level. At the within-person level, prosocial behavior was positively reciprocally associated with social preference, while no significant relations between prosocial behavior and subjective well-being and between social preference and subjective well-being were found. The findings highlight adolescents' prosocial behavior and social preference could mutually facilitate each other over time, which can be used to guide adolescents' positive development.

The Power Dynamics of Friendship: Between- and Within- Person Associations among Friend Dominance, Self-Esteem, and Adolescent Internalizing Symptoms

Although forming close, egalitarian peer relationships is a central developmental task of adolescence, little is known about the psychological consequences of power imbalances in adolescents' friendships. The current study investigated whether there are psychological costs of feeling subordinate to friends by examining longitudinal associations between adolescents' perceived friend dominance and internalizing symptoms. Across one year, five waves of survey data were collected from 388 adolescents (Mage = 14.05, SDage = 0.41; 61% female; 46% White, 19% Black, 17% Asian, 6% Arab, Middle Eastern, North African, 6% Biracial/Multiethnic, 3% Latinx/Hispanic, 1% American Indian/Native American, 1% identifying with another race/ethnicity, <1% not reporting). Multilevel modeling disentangled between- and within-person effects of perceived friend dominance on depressive and anxiety (internalizing) symptoms and tested self-esteem as a mediator. The results indicated that both individual differences and intraindividual fluctuations in perceived friend dominance were associated with internalizing symptoms. At the between-person level, adolescents who perceived their friends as more dominant reported more severe depressive and anxiety symptoms than adolescents who perceived their friends as less dominant. At the within-person level, increases in perceived friend dominance were accompanied by increases in depressive and anxiety symptoms, and these associations were partially explained by changes in self-esteem. The findings advance understanding of power dynamics in adolescents' close friendships and highlight the psychological toll of feeling dominated by friends.

Expecting the unexpected: a review of learning under uncertainty across development

Many of our decisions take place under uncertainty. To successfully navigate the environment, individuals need to estimate the degree of uncertainty and adapt their behaviors accordingly by learning from experiences. However, uncertainty is a broad construct and distinct types of uncertainty may differentially influence our learning. We provide a semi-systematic review to illustrate cognitive and neurobiological processes involved in learning under two types of uncertainty: learning in environments with stochastic outcomes, and with volatile outcomes. We specifically reviewed studies (N = 26 studies) that included an adolescent population, because adolescence is a period in life characterized by heightened exploration and learning, as well as heightened uncertainty due to experiencing many new, often social, environments. Until now, reviews have not comprehensively compared learning under distinct types of uncertainties in this age range. Our main findings show that although the overall developmental patterns were mixed, most studies indicate that learning from stochastic outcomes, as indicated by increased accuracy in performance, improved with age. We also found that adolescents tended to have an advantage compared with adults and children when learning from volatile outcomes. We discuss potential mechanisms explaining these age-related differences and conclude by outlining future research directions.

Joint Developmental Trajectories of Likability and Popularity: Associations with Social Behavior among Chinese Adolescents

The beginning of secondary school is a critical time point of adolescents' development as they entered a new peer context in which social status was re-established. As the key indicators of social status, likability and popularity co-occur but also display distinct developmental trajectories over time. Nevertheless, little is known about the joint developmental trajectories of likability and popularity among adolescents and how identified trajectories are associated with important social behavior. The current study examined the joint developmental trajectories of likability and popularity among Chinese adolescents and their associations with social behavior (prosocial behavior, aggression, and peer victimization) over time. A total of 1509 Chinese 7th grade students (53.6% male, M_age = 13.1, SD = 0.67) participated in self-report and peer nomination assessments on three occasions at 6-month intervals. Parallel process latent growth mixture models revealed four distinct trajectories of likability and popularity: social status decreasing, average, high social status, and social status increasing. The high social status group showed the highest levels of prosocial behavior, the lowest levels of peer victimization, and higher aggression than the average group. The social status decreasing group and social status increasing group exhibited the lower prosocial behavior as well as the higher aggression and peer victimization compared to the average group over time. The findings highlight the co-occurrence but diversity of developmental patterns of likability and popularity in adolescence.

Best Friend's Popularity: Associations with Psychological Well-Being and School Adjustment in China During Early Adolescence

Popularity has been empirically linked to psychological and several indices of school adjustment outcomes during childhood and early adolescence. Yet, best friend popularity in relation to the adjustment outcomes remains unclear, especially in more interdependent-oriented cultures. To address this gap, this study applied the Actor-Partner Interdependence Model (APIM) to simultaneously considering whether, and how, the popularity of youth (actor effects) and their best friends (partner effects) contribute uniquely to psychological well-being and school adjustment outcomes, after controlling for social preference. Age and gender differences were also examined. Participants were 162 same-gender best friend dyads (81 boys, M_age = 11.24 years, SD = 1.18) from Shanghai, P.R. China. Among the results, both youth's own and their best friends' popularity were positively related to self-esteem and school attitudes, and negatively related to depressive symptoms. In addition, results from multi-group analyses revealed both actor and partner effects did not vary across gender. Finally, exploratory analyses showed that only actor effects varied across age for the associations between popularity and self-esteem and school attitudes. These findings highlight the important role of the best friend's popularity in promoting Chinese youth's experiences of psychological and school adjustment.

How popularity goal and popularity status are related to observed and peer-nominated aggressive and prosocial behaviors in elementary school students

Whereas previous research with secondary school students has demonstrated that popularity goals and actual popularity status are related to peer-reported aggression, it is unclear whether this is already the case in the upper grades of elementary school. The current study extends previous research by assessing elementary school students, focusing on both aggressive and prosocial behaviors, and importantly by observing aggressive and prosocial behaviors in cooperative and competitive small-group settings. Participants were 173 Dutch fifth- and sixth-grade students (58.2% girls; M_age = 11.11 years, SD = 0.72), who self-reported popularity goals and nominated peers for popularity, aggressive behavior, and prosocial behavior. Participants' behavior in a cooperative task and a competitive task, completed in groups of 4, was observed. Results show that popularity goal was related to high levels of aggression according to peers (only for boys) and to low levels of prosocial behavior across reporters and settings. Actual popularity status was related to high levels of strategic aggression across reporters and settings and additional high levels of strategic prosocial behavior in a cooperative setting. Thus, the current study demonstrates that popularity goal is already related to social behavior in elementary school and that desired and actual popularity are not only predictive of the behavior as perceived by peers but also predictive of observed behaviors during group interactions.

Predicting changes in classroom aggression status norms: The role of teachers’ normative beliefs and students’ perceived support

This study examined variations in the development of classroom aggression popularity norms, as well as the role of homeroom teachers’ aggression beliefs and students’ perceptions of teachers’ support as predictors of such variations. To achieve this goal, a sample of 63 classrooms were assessed at four time points during a school year, in nine Colombian schools. Results indicated that, overall, classroom aggression popularity norms have a nonlinear trajectory with an increase that peaks at the end of the school year. Also, we found that teachers’ aggression beliefs were concurrently associated with aggression popularity norms across time, and that teachers’ support prevented the increase in these norms. These findings are discussed considering their practical implications for preventing aggression in the school context.

Trajectories of Perceived Technological Impairment and Psychological Distress in Adolescents

Fears that digital technologies harm adolescents' mental health abound; however, existing research is mixed. This study examined how perceived technological impairment (i.e., perceptions of digital technology interfering with daily life) related to psychological distress across five years in adolescence. A latent curve model with structured residuals was applied to disentangle between-from within-person associations, in which it was tested whether (a) adolescents who increased in their perceptions of technological impairment over time also increased in psychological distress (between-person) and (b) if an adolescent who reported greater perceptions of technological impairment relative to their underlying trajectory at one wave consequently reported greater distress at the subsequent wave (within-person). These associations were tested in a sample of 2104 adolescents (Mage = 12.36; 52% girls; 48% Non-White). Perceived technological impairment and psychological distress increased together over time. Girls and older adolescents (13-15 at baseline) reported greater initial levels of perceived impairment. Younger adolescents (9-12 at baseline) increased more steeply in perceived impairment over time. There was no evidence of longitudinal within-person associations. The findings suggest that although there is evidence of between-person associations in which increases in perceived technological impairment coincide with increases in psychological distress, the absence of within-person associations cautions against a cause-and-effect narrative between digital technology use and mental health.

Physical Effort Exertion for Peer Feedback Reveals Evolving Social Motivations From Adolescence to Young Adulthood

Peer relationships and social belonging are particularly important during adolescence. Using a willingness-to-work paradigm to quantify incentive motivation, we examined whether evaluative information holds unique value for adolescents. Participants (N = 102; 12-23 years old) rated peers, predicted how peers rated them, and exerted physical effort to view each peer's rating. We measured grip force, speed, and opt-out behavior to examine the motivational value of peer feedback, relative to money in a control condition, and to assess how peer desirability and participants' expectations modulated motivated effort across age. Overall, when compared with adolescents, adults were relatively less motivated for feedback than money. Whereas adults exerted less force and speed for feedback when expecting rejection, adolescents exerted greater force and speed when expecting to be more strongly liked or disliked. These findings suggest that the transition into adulthood is accompanied by a self-protective focus, whereas adolescents are motivated to consume highly informative feedback, even if negative.

The Roles of Clique Status Hierarchy and Aggression Norms in Victimized Adolescents' Aggressive Behavior

The healthy context paradox indicates that in "healthy" contexts, with lower bullying or victimization norms, victimization experiences would unexpectedly exacerbate adolescents' adjustment difficulties, yet the underlying mechanisms remain unclear, particularly from the clique perspective. The current 2-year longitudinal multilevel study attempts to examine the conditional effects of both clique structure (i.e., status hierarchy) and clique norms (i.e., aggression norms) on the relationship between individual victimization and aggressive behavior. The sample consisted of 691 Chinese junior high school students (M_age = 12.74, SD = 0.43; 55.6% boys), who were identified to belong to 153 cliques with sizes varying from 3 to 12 students (M_size = 5.08, SD = 1.89), according to the social cognitive map. Participants completed peer-nominated measures at two time points, two years apart. The multilevel models revealed that it was in less hierarchical cliques with lower aggression that victimized adolescents would exhibit more relational forms of aggression (rather than overt forms) two years later. More intriguingly, contrary results were found in all-girls cliques and all-boys cliques. Specifically, victimized girls' overt and relational aggression was higher in cliques with less hierarchy and lower aggression, whereas, in cliques with more hierarchy and higher aggression, victimized boys' relational aggression was higher, which conforms to the healthy context paradox and the peer contagion hypothesis, respectively. These findings highlight that egalitarian cliques with low aggression would promote aggressive behavior of victimized adolescents, especially for girls rather than for boys, which in turn has crucial implications for anti-bullying interventions.

The Silver Lining in the Dark Cloud of Social Status Insecurity: The Mediating Role of Popularity Goals in the Association Between Social Status Insecurity and Chinese Adolescents' Bullying Bystander Behaviors

Bullying bystander behavior has an important effect on bullying-both in stopping and facilitating it. Although bullying bystander behaviors have long been understood as a peer group process, existing research that focuses on the role of peer factors is still limited. Moreover, less is known about the social cognitive-related role of peer factors and its underlying mechanisms in adolescents' bullying bystander behaviors. Accordingly, using resource control theory, this study examines the mediating effects of popularity goals on the associations between social status insecurity and bullying bystander behaviors (active defending behaviors, passive bystanding behaviors) among 333 Chinese adolescents (181 males; M_age = 13.10; SD = .50). Analyses were conducted using SPSS 23 to conduct descriptive and correlation analyses. The hypothesized mediation model was tested using a structural equation modeling approach with bootstrapping techniques (bootstrap replications: 5,000) using AMOS 23. The results showed that popularity goals fully mediated the relationship between adolescents' social status insecurity and their active defending behaviors. No gender differences in these mediating effects were observed. The results also indicated that popularity goals did not mediate the relationship between social status insecurity and passive bystanding behaviors. These findings enrich our understanding of bullying bystander behaviors and highlight the positive role of social cognitive factors (e.g., popularity goals) in active defending behaviors. Our findings deepen our understanding of bullying bystanders through integrating proximate and ultimate approaches. Our findings have significant practical implications, which suggest that school anti-bullying interventions should value the positive roles of social status insecurity and popularity goals in promoting active defending behaviors.