Stability of aggression during early adolescence as moderated by reciprocated friendship status and friend’s aggression

Effect of parent-child relationship on physical aggression among adolescents: Global school-based student health survey

Data from the Global School-based Student Health Survey (GSHS) conducted in 2009 consisting of 5192 Pakistani school-going adolescents was used to assess the association between parent-child-relationship and physical-aggression. A multilevel-weighted-cox-proportional-algorithm was performed. The overall prevalence of physical-aggression was 41% of which 27% had a poor parent-child relationship. Male adolescents who have a poor bond with their parents had two times the prevalence of physical-aggression (95% CI: 1.82, 3.00) than those female adolescents with the strong parent-child-bonding. The findings of this study implicated that the poor parental bond and the role of gender as potential factors in physically aggressive adolescents.

A Longitudinal Examination of the Relations Between Moral Disengagement and Antisocial Behavior in Sport

Moral disengagement (MD) has been positively associated with antisocial behavior (AB) in sport. However, the longitudinal associations between MD and AB are unexamined to date. Adopting a three-wave cross-lagged panel design, the authors examined the reciprocal relations between MD and two forms of AB (i.e., toward opponents and teammates) across a competitive season with a sample of 407 team-sport athletes (Mage = 15.7 years) from Canada. Using structural equation modeling, the authors found strong positive autoregressive effects for MD and both forms of AB across both time periods. They also identified strong positive synchronous correlations between MD and both types of AB at each time point. Finally, cross-lagged effects were only found between MD and AB toward opponents; effects from MD to AB toward opponents were stronger than the reciprocal effects. These findings contribute important knowledge on the regulation of AB in sport.

Non-reciprocal Friendships in a School-Age Boy with Autism: The Ties that Build?

This mixed-methods study examined differences in social interaction patterns between a school-age boy with autism and his friends, non-reciprocal friends, and non-friends during recess time at a mainstream school (third grade of elementary school). Through a combination of observational methodology and social network analysis with an idiographic, follow-up and multidimensional design approach, we used lag sequential and polar coordinate analysis to ascertain the associations between various interactive behaviors as a function of type of friendship relation. After 40 sessions, we found that the non-reciprocal friendship relations of the boy with autism could have significantly greater potential than his reciprocal friendships to increase active engagement and reduce the time he spent alone during recess.

Positive and Negative Peer Influence in Residential Care

The potential for negative peer influence has been well established in research, and there is a growing interest in how positive peer influence also impacts youth. No research, however, has concurrently examined positive and negative peer influence in the context of residential care. Clinical records for 886 residential care youth were used in a Hierarchical Linear Model analysis to examine the impact of negative and positive peer influence on naturally occurring patterns of serious problem behavior over time. Negative peer influence, where the majority of youth in a home manifested above the average number of serious behavior problems, occurred 13.7% of the time. Positive peer influence, where the majority of youth manifested no serious problem behaviors for the month, occurred 47.7% of the time. Overall, youth problem behavior improved over time. There were significantly lower rates of serious problem behavior in target youth during positive peer influence months. Conversely, there were significantly higher rates of serious problem behaviors in target youth during negative peer influence months. Negative peer influence had a relatively greater impact on target peers' serious behavior problems than did positive peer influence. Caregiver experience significantly reduced the impact of negative peer influence, but did not significantly augment positive peer influence. Months where negative peer influence was combined with inexperienced caregivers produced the highest rates of serious problem behavior. Our results support the view that residential programs for troubled youth need to create circumstances that promote positive and control for negative peer influence.

Pathways to Reciprocated Friendships: A Cross-Lagged Panel Study on Young Adolescents' Anger Regulation towards Friends

Adolescents' close friendships are an important and unique learning context in which adolescents can practice and hone their emotion regulation skills within an egalitarian, supportive relationship structure that provides important feedback on the effectiveness of the regulation strategies. This longitudinal study examined whether adolescents' involvement in supportive reciprocal friendships influenced the way in which they regulated angry feelings arising in these friendships. A sample of 299 German adolescents began a 30-month, 3-wave longitudinal study in grade 7 (151 boys, M age = 12.6 years; 100% White). They completed a social network inventory (LueNIC), a peer-nomination measure, and the questionnaire on Strategies of Anger Regulation for Adolescents (SAR-A) in every wave. Cross-lagged-panel modeling indicated a pattern of socialization effects even when controlling for previous friendship involvement, previous anger regulation, peer acceptance, gender, classroom membership, and possible friendship selection influences. Adolescents with more reciprocal friends at Time 1 (T1) reported using aggressive strategies of anger regulation (i.e., verbal and relational aggression, fantasies of revenge) and ignoring the friend less often at Time 2 (T2). Similar results were obtained between T2 and Time 3 (T3). There was a marginally significant effect for one of three non-aggressive strategies such that a higher involvement in friendships at T2 explained more reappraisal of the anger-eliciting event at T3 but significant effects did not emerge for the strategies of redirection of attention and explanation and reconciliation. The results are discussed within a socialization of emotion framework with implications for social skills training modules.

Effects of physical education, extracurricular sports activities, and leisure satisfaction on adolescent aggressive behavior: A latent growth modeling approach

The present study aimed to investigate the longitudinal influence of physical education classes, extracurricular sports activities, and leisure satisfaction on aggressive behavior among South Korean adolescents. Data were drawn from the Korea Youth Panel Survey. We used latent growth curve modeling to explain the growth trajectory of adolescent aggressive behaviors and a multi-group analysis to investigate gender differences in aggressive behavior. The results indicated that adolescents’ aggressive behavior significantly changed with age. There were significant gender-based differences in the level of and changes in aggressive behavior over time. Both extracurricular sports activities and leisure satisfaction had significant influences on the changes in adolescents’ aggressive behavior with age, whereas physical education classes did not.

On the use of Social Relations and Actor–Partner Interdependence Models in developmental research

We offer comments on the eight works contained in the Special Issue, all of which use advanced methods for analysing interdependencies using variants of the Social Relations Model (SRM) or the Actor–Partner Interdependence Model (APIM). After critically discussing the SRM and APIM as used in these works, we describe similarities and differences between these two approaches. We also discuss the substantive contributions of this collection and then offer our suggestions for future development of the two models.

Recent advances in the study of development, social and personal experience, and psychopathology

The field of developmental psychopathology has been challenged by various issues in understanding the link between social experiences and psychopathology. These challenges involve conceptual, methodological and statistical concerns that are often interrelated. This article examines four advances in resolving these concerns. First, co-rumination and deviancy training are discussed as specific interpersonal processes that are examples of important social experiences for predicting psychopathology. Second, dynamic properties of dyadic interaction are discussed as one of the recent advances in methodology for this area. Third, the Actor-Partner Interdependence Model is outlined as one of the recent statistical advances in the study of individuals within a dyad. Fourth, changes in the study of culture are presented as informing the understanding link between social experiences and developmental psychopathology.

Patterns of adolescent friendships, psychological adjustment and antisocial behavior: The moderating role of family stress and friendship reciprocity

This study distinguishes different patterns of friendship quality in terms of support from and conflict with friends, and reciprocity. Associations between friendship patterns and adolescents' adjustment (self-perception, expectations for the future, depressive feelings, sense of alienation, lying, disobedience, and aggression) were hypothesized to be moderated by family stress and friendship reciprocity. The sample comprised 622 adolescents of both genders, aged 14 to 20 years. We administered a questionnaire, including the Friendship Quality Scale and a peer nomination, twice at a 6-month interval. We identified two patterns of stable friendships: high (47%) and low (37%) quality. In two other groups, friendship quality changed over time, either from low to high (7%), or from high to low (9%). Of all adolescents, 58% had reciprocal and stable friends and 42% had unilateral friends. Under conditions of high family stress, supportive friendships do not have a positive effect on expectations for success and sense of alienation. Reciprocal friendship promotes higher levels of lying and disobedience but also protects against aggression. Summarizing, the effects of friendship quality can be moderated, either diminishing or exacerbating it, by other context factors.

Dyadic and group perspectives on close relationships

Recent advances in the study of close relationships hold the potential for new insignts into the significance of interdependence and the mechanism of relationship influence. The papers in this special issue apply two new data analytic techniques to the study of family and friend relationships. The Actor–Partner Interdependence Model incorporates the perspectives of both participants in a dyad into analyses that describe shared and unique views of the relationship. The Social Relations Model incorporates the perspectives of all members of a group into analyses that ascribe views unique to individuals and relationships, and views shared by the entire group. Developmental applications of techniques originally designed for concurrent interdependent data are described with the aim of advancing these analytic procedures to the study of lifespan human development.

Developmental Trajectories of Peer-Reported Aggressive Behavior: The Role of Friendship Understanding, Friendship Quality, and Friends' Aggressive Behavior

OBJECTIVE

To investigate developmental trajectories in peer-reported aggressive behavior across the transition from elementary-to-middle school, and whether aggressive behavior trajectories were associated with friendship quality, friends' aggressive behavior, and the ways in which children think about their friendships.

METHOD

Participants included a community sample of 230 5th grade children who were assessed when they made a transition from elementary-to-middle school (6th grade). Peer nominations were used to assess the target child's and friend's aggressive behavior. Self- and friend reports were used to measure friendship quality; friendship understanding was assessed via a structured interview.

RESULTS

General Growth Mixture Modeling (GGMM) revealed three distinct trajectories of peer-reported aggressive behavior across the school transition: low-stable, decreasing, and increasing. Adolescents' understanding of friendship formation differentiated the decreasing from the low-stable aggressive behavior trajectories, and the understanding of friendship trust differentiated the increasing from the low-stable aggressive and decreasing aggressive behavior trajectories.

CONCLUSIONS

The findings indicated that a sophisticated understanding of friendship may serve as a protective factor for initially aggressive adolescents as they transition into middle school. Promoting a deepened understanding of friendship relations and their role in one's own and others' well-being may serve as an important prevention and intervention strategy to reduce aggressive behavior.

Perceptions of intimacy and friendship reciprocity moderate peer influence on aggression

Previous research has shown that close friends' influence can exacerbate adolescents' aggressive behavior, but results of studies which examine whether friendships of greater or lesser qualities moderate peer influence effects are inconsistent. The present study tested whether the perception of the positive friendship quality of intimate exchange and friendship reciprocity moderated best friend influence on participant aggression over time. The 243 participants were approximately 12 years old and ethnically diverse. Neither intimate exchange nor reciprocity significantly moderated friend influence on aggression in a simple way, but the interaction of intimate exchange and friendship reciprocity predicted peer influence on participants' aggression over time. Specifically, highly intimate, nonreciprocal best friendships and less intimate, reciprocal best friendships showed greatest influence when friends' proportion of peer nominations for aggression was high. Reciprocity and intimacy should be considered when predicting peer influence on aggression.

Childhood friendships and psychological difficulties in young adulthood: an 18-year follow-up study

Childhood friendships have been shown to impact mental health over the short term; however, it is unclear whether these effects are sustained into young adulthood. We studied the prospective association between childhood friendships and psychological difficulties in young adulthood. Data come from 1,103 French 22-35 year olds participating in the TEMPO study. Childhood friendships were ascertained in 1991 when participants were 4-16 years old. Psychological difficulties were measured in 2009 using the Adult Self-Report. Logistic regression models controlled for participants' age, sex, childhood psychological difficulties and parental characteristics. Young adults who had no childhood friends had higher odds of psychological difficulties than those with at least one friend: (adjusted ORs 2.45; 95% CI 1.32-4.66, p = 0.01 for high internalizing symptoms; 1.81; 95% CI 0.94-3.54, p = 0.08 for high externalizing symptoms). Social relations early in life may have consequences for adult psychological well-being.

The protective role of school friendship ties for substance use and aggressive behaviors among middle school students

BACKGROUND

Few studies have examined the interplay among quantifiable aspects of peer bonds, friendship types, personal characteristics, and behavioral outcomes in schools in distressed neighborhoods. The aim of this study was to identify compensatory and protective factors that can be promoted in school-based prevention programs.

METHODS

The sample was comprised of students in East Los Angeles County (N=184). We investigated the association between 3 measures of social influence (friends in gangs, nominations of schoolmates as friends [out-degree], and the number of nominations received from schoolmates [in-degree]) and social self-control with lifetime alcohol, tobacco, inhalant, "other" drug use, and aggression.

RESULTS

Friendships were protective for substance use and aggression and moderated the relationship between social self-control, substance use, and aggression. We found important sex differences; girls who nominated more friends were less likely to report alcohol use and aggression relative to boys but were more likely to have reported drug use as social self-control scores increased.

CONCLUSIONS

Our results have important implications for school-based prevention and intervention programs. We provide preliminary evidence that school ties and perceptions of belongingness can mitigate the effects of several risk factors linked to substance use and aggression.

On the psychometric properties of the aggressiveness-IAT for children and adolescents

In research on aggression, implicit association tests (IATs) have been constructed to elucidate automatic processes involved in aggressiveness. Despite an increasing number of applications of the "Aggressiveness-IAT" in basic and applied research, the psychometric properties of this method for measuring an automatic aggressive self-concept have not been comprehensively investigated. Although the Aggressiveness-IAT has been used both as a cross-situationally consistent trait measure and as a measure to indicate situational changes, prior studies have not tested to what extent it reliably captures a stable trait vs. an occasion-specific aggressive self-concept. The present research scrutinizes the psychometric properties of the Aggressiveness-IAT by addressing two issues. First, we tested the reliability, consistency, and occasion specificity of the Aggressiveness-IAT in a longitudinal panel study with four waves and 574 Austrian school children/adolescents by applying latent-state trait (LST) theory. Second, we validated latent trait scores of the IAT vis-à-vis other measures either clearly related to aggression or not. Results demonstrate that 20-30% of the variance in children's and adolescents' IAT scores is situation-unspecific (i.e., "stable"), whereas 36-50% are situation-specific. Regarding its construct validity, the Aggressiveness-IAT is correlated with explicit measures of aggression and related constructs, but it is not associated with discriminant variables (e.g., school achievement). Implications for using the Aggressiveness-IAT are discussed in the light of these findings. Aggr. Behav. 41:84-95 2015. © 2014 Wiley Periodicals, Inc.

Emotion understanding, pictorial representations of friendship and reciprocity in school-aged children

This study examined the relationship between emotional understanding, friendship representation and reciprocity in school-aged children. Two hundred and fifty-one Caucasian 6-year-old children (111 males and 140 females) took part in the study. The Test of Emotion Comprehension (TEC) and the Pictorial Assessment of Interpersonal Relationships (PAIR) were used. Children having a reciprocal friendship and children having a unilateral friendship with a child named as their "best friend" were compared on the emotional understanding task and on their pictorial representations of friendship. Multilevel analyses indicated that friendship status effects were not influenced by classroom-level differences. Results showed that children with reciprocal friendships drew themselves as more similar to and more cohesive with their best friends, and they showed better understanding of emotions, than children having a unilateral friendship. Finally, the implications of these findings for theoretical and empirical research development on friendship are discussed.

Transitions between subclasses of bullying and victimization when entering middle school

We examined the effects of depressive symptoms, antisocial attitudes, and perspective-taking empathy on patterns of bullying and victimization during the transition from late elementary (4th grade to 5th grade) to middle school (6th grade) among 1,077 students who participated in the Youth Matters (YM) bullying prevention trial. Latent transition analysis was used to establish classes of bullying, victimization, bully-victimization, and uninvolvement. The intervention had a positive impact on children as they moved from elementary to middle school. More students in the YM group transitioned from the involved statuses to the uninvolved status than students in the control group during the move to middle school. Elementary school bullies with higher levels of depressive symptoms were less likely than other students to move to an uninvolved status in the first year of middle school. Students who held greater antisocial attitudes were more likely to be a member of the bully-victim status than the uninvolved status during the move to middle school. Perspective-taking empathy, however, was not a significant predictor of status change during the transition to middle school. Implications for school-based prevention programs during the move to middle school are noted.

Parent-child relationships, parental psychological control, and aggression: maternal and paternal relationships

Few studies have examined both maternal and paternal parenting practices in the prediction of child outcomes despite evidence that underscores the salience of fathers throughout their children's development. This study examined the role of the quality of mother-child and father-child relationships in buffering the influence of ineffective parenting practices on subsequent adolescent aggression. Measures of parental psychological control, the quality of the parent-child relationship, and youth aggressive behavior were completed by 163 (49 % female) mostly White and Asian adolescents and their parents during the eighth and ninth grades. Paternal psychological control predicted aggression when adolescents perceived low-quality relationships with their mothers. Similarly, maternal psychological control predicted aggression when adolescents perceived low-quality relationships with their fathers. Maternal psychological control was also associated with lower levels of aggression among adolescent males who reported a high-quality relationship with their father. These findings indicate that, when one parent exerts psychological control, the low-quality relationship the adolescent shares with the opposite gender parent increases risk for adolescent aggression. The findings also suggest that, as mothers exert psychological control, the high-quality parent-child relationship a son shares with his father decreases risk for adolescent aggression.

Parent-specific reciprocity from infancy to adolescence shapes children's social competence and dialogical skills

Reciprocity - the capacity to engage in social exchange that integrates inputs from multiple partners into a unified social event - is a cornerstone of adaptive social life that is learned within dyad-specific attachments during an early period of neuroplasticity. Yet, very little research traced the expression of children's reciprocity with their mother and father in relation to long-term outcomes. Guided by evolutionary models, we followed mothers, fathers, and their firstborn child longitudinally and observed mother-child and father-child reciprocity in infancy, preschool, and adolescence. In preschool, children's social competence, aggression, and prosocial behavior were observed at kindergarten. In adolescence, children's dialogical skills were assessed during positive and conflict interactions with same-sex best friends. Father-child and mother-child reciprocity were individually stable, inter-related at each stage, and consisted of distinct behavioral components. Structural equation modeling indicated that early maternal and paternal reciprocity were each uniquely predictive of social competence and lower aggression in preschool, which, in turn, shaped dialogical skills in adolescence. Father-adolescent reciprocity contributed to the dialogical negotiation of conflict, whereas mother-adolescent reciprocity predicted adolescents' dialogical skills during positive exchanges. Results highlight the role of parent-child reciprocity in shaping children's social collaboration and intimate relationships with non-kin members of their social world.

Adolescent Aggression: The Role of Peer Group Status Motives, Peer Aggression, and Group Characteristics

Recent studies of youth aggression have emphasized the role of network-based peer influence processes. Other scholars have suggested that aggression is often motivated by status concerns. We integrate these two veins of research by considering the effects of peer status motivations on subsequent adolescent aggression, net of their own status motivations, prior aggression, and peer behavior. We also explore different levels at which peer effects may occur, considering the effects of reciprocated and unreciprocated friendships as well as larger, meso-level peer groups. We anticipate that peer group effects are magnified by both size and boundedness as measured by Freeman's (1972) Segregation Index. We find that, net of the adolescent's aggression at time 1, both the aggressive behaviors and the status valuations of friends independently increase the likelihood of aggression at time 2, six months later. The aggressive behavior of friends who do not reciprocate the adolescent's friendship nomination has particular impact. The average status valuation of peer groups increases their members' likelihood of aggression, even after controlling for their own attitudes about status, their friends' attitudes, and their friends' aggressive behavior. This effect is magnified in large groups and groups with high Freeman segregation scores.

An experimental investigation of peer influences on adolescent hostile attributions

Aggression in young people has been associated with a bias toward attributing hostile intent to others. However, little is known about the origin of biased social information processing. The current study explored the potential role of peer contagion in the emergence of hostile attribution in adolescents. One hundred thirty-four adolescents (M age = 13.8 years) were assigned to one of two manipulated "chat-room" conditions, where they believed they were communicating with online peers (e-confederates) who endorsed either hostile or benign intent attributions. Adolescents showed increased hostile attributions following exposure to hostile e-confederates and reduced hostility in the benign condition. Further analyses demonstrated that social anxiety was associated with a reduced tendency to take on hostile peer attitudes. Neither gender nor levels of aggression influenced individual susceptibility to peer influence, but aggressive adolescents reported greater affinity with hostile e-confederates.

Adolescents' conformity to their peers' pro-alcohol and anti-alcohol norms: the power of popularity

BACKGROUND

Research on adolescent development suggests that peer influence may play a key role in explaining adolescents' willingness to drink, an important predictor of drinking initiation. However, experiments that thoroughly examine these peer influence effects are scarce. This study experimentally examined whether adolescents adapted their willingness to drink when confronted with the pro-alcohol and anti-alcohol norms of peers in a chat room session and whether these effects were moderated by the social status of peers.

METHODS

We collected survey data on drinking behavior, social status, and willingness to drink among five hundred thirty-two 14- to 15-year-olds. Of this sample, 74 boys participated in a simulated Internet chat room session in which participants were confronted with preprogrammed pro-alcohol or anti-alcohol norms of "grade-mates" which were in fact preprogrammed e-confederates. Accordingly, we tested whether participants adapted their willingness to drink to the norms of these grade-mates. To test whether adaptations in participants' willingness to drink would depend on grade-mates' social status, we manipulated their level of popularity.

RESULTS

The results indicated that adolescents adapted their willingness to drink substantially to the pro-alcohol (i.e., more willing to drink) as well as anti-alcohol (i.e., less willing to drink) norms of these peers. Adolescents were more influenced by high-status than low-status peers. Interestingly, the anti-alcohol norms of the popular peers seemed most influential in that adolescents were less willing to drink when they were confronted with the anti-alcohol norms of popular peers. Additionally, the adolescents internalized these anti-alcohol norms.

CONCLUSIONS

This study gives more insight into peer influence processes that encourage or discourage alcohol use. These results could be fundamental for the development of prevention and intervention programs to reduce alcohol use among the adolescents.

Predictors of susceptibility to peer influence regarding substance use in adolescence

The extent to which peer influences on substance use in adolescence systematically vary in strength based on qualities of the adolescent and his or her close friend was assessed in a study of 157 adolescents (age: M = 13.35, SD = 0.64), their close friends, and their parents assessed longitudinally with a combination of observational, analogue, sociometric, and self-report measures from early to mid adolescence. The degree to which adolescents changed their levels of substance use in accord with their peers' baseline levels of use was predicted by a range of theoretically salient factors including: observed teen lack of autonomy and social support in prior interactions with mothers, low teen refusal skills, and the level of social acceptance of their close friend. Findings suggest the importance of both internal factors (e.g., autonomy and relatedness struggles) and external factors (e.g., social status of friends) in explaining why vulnerability to peer influence processes may be much greater for some adolescents than others.

A new perspective for delinquency: culture conflict measured by seriousness perceptions

Numerous theories have attempted to analyze and understand the factors and etiology of juvenile delinquency. The present study is the first to suggest the use of Sellin's "culture conflict" theory as a possible cultural explanation for the phenomenon of juvenile delinquency. According to Sellin, crime in many instances is a product of culture conflict between the values and norms of a certain subculture in a given society and those of the general culture. Following Sellin's rationale, this study argues that youths constitute a social subculture with certain values, norms, and stances toward the criminal law that is not necessarily concordant with the moral values and formal norms of the general culture of adults, who determine the content of the criminal law. These assertions are analyzed via a crime seriousness study, in which adult and teenage respondents from a national (Israeli) sample were asked to evaluate the seriousness of various criminal offenses committed by adolescents. Generally, significant differences were found between the seriousness and punishment values given by the adult and juvenile respondents to violent offenses (high) and self-use of illegal drugs (low), with adult respondents providing significantly higher seriousness values and punishment options for them. Moreover, in a regression analysis, the variable of respondents' age was found as decisive in understanding both dependent variables. The implications of these findings are discussed in this study.

Sense making and benefit finding in couples who have a child with Asperger syndrome: an application of the Actor-Partner Interdependence Model

Parents of children with Asperger syndrome face many challenges that may lead them to search for meaning by developing explanations for (sense making) and finding benefits (benefit finding) in having a child with special needs. Although family theorists have proposed that finding meaning occurs interpersonally, there is a dearth of empirical research that has examined finding meaning at the couple level. This study examined sense making and benefit finding in 84 couples who have a child with Asperger syndrome by using the Actor-Partner Interdependence Model (Kenny et al., 2006) to examine actor effects (i.e. the extent to which an individual's score on the predictor variable impacts his or her own level of adjustment) and partner effects (i.e. the extent to which an individual's score on the predictor variable has an impact on his or her partner's level of adjustment) of sense making and benefit finding on parental adjustment. Results demonstrated that parents' benefit finding related to greater anxiety and parents' sense making related to not only their own adjustment but also their partner's adjustment. Results highlight the importance of adopting an interpersonal perspective on finding meaning and adjustment. Limitations, future research and clinical implications are also discussed.

The relation between adolescent social competence and young adult delinquency and educational attainment among at-risk youth: the mediating role of peer delinquency

OBJECTIVE

We examined trajectories of adolescent social competence as a resilience factor among at-risk youth. To examine potential mechanisms of this resilience process, we investigated the putative mediating effect of peer delinquency on the relation between adolescent social competence and young adult delinquency seriousness and educational attainment.

METHOD

Participants (n = 257) were screened to be at risk for antisocial behaviour at age 13 years. Data were derived from an ongoing longitudinal study of the development of antisocial and delinquent behaviour among inner-city boys, the Pittsburgh Youth Study. We used data collected from participants when aged 13 years until they were aged 25.5 years for our study.

RESULTS

Results indicated that boys with high levels of social competence decreased their involvement with deviant peers throughout adolescence, which, in turn, predicted less serious forms of delinquency in early adulthood. Social competence had a direct effect on educational attainment in early adulthood, as boys who developed social competencies in adolescence went further in school irrespective of their involvement with delinquent peers.

CONCLUSIONS

Results suggest that promoting the development of social competencies and reducing involvement with delinquent peers will protect at-risk youth from engaging in serious delinquency in early adulthood while increasing their educational success.

Change in Friendship Homophily

This longitudinal study investigated friendship homophily (i.e., the preference for intra-ethnic over inter-ethnic friends) among immigrant adolescents in Israel and Germany. Based on acculturation theories and known differences between Israel and Germany in the establishment of Russian-speaking immigrant communities in these countries, it was hypothesized that levels and rates of change in friendship homophily would differ. Associations between context- and acculturation-related variables and levels and rates of change in adolescent friendship homophily were also tested. The sample consisted of 877 Russian Jewish and 358 ethnic German Diaspora migrant adolescents (i.e., migrants returning to the country of their ancestors from the former Soviet Union). Results confirmed higher levels and a less pronounced decrease of friendship homophily in Israel as compared to Germany. Especially acculturation-related variables were found to be best at predicting intercept and slope of friendship homophily. Findings also showed that differences in levels and rates of change in adolescent friendship homophily between both countries could be explained by language use; thus, using the new host language more often appeared to be a crucial variable for lower levels of friendship homophily. Overall, results suggest very similar adaptation processes toward lower friendship homophily in the two countries but at a different pace over time.

Romantic partner selection and socialization of young adolescents' substance use and behavior problems

This study examined romantic partner selection and socialization of substance use (cigarettes, alcohol) and behavior problems among a sample of 78 young adolescents (6th-8th graders) over eleven months. Adolescent and romantic partner behaviors were assessed before and after relationships were initiated via school records and self-report. Most selection and socialization effects were apparent for the eighth grade adolescents (at Time 1). Prior to their relationship, eighth graders and romantic partners were alike on alcohol use. In contrast, romantic socialization effects emerged for eighth graders' cigarette use and behavior problems. The nature of the partner socialization effects depended on the combination of adolescents' and partners' pre-relationship behaviors. Eighth graders who dated partners with fewer problems showed the greatest instability in their behavior problems and partner behavior predicted greater decreased in problem behaviors among adolescents with more problems. The implications of these findings are discussed within the broader context of adolescent peer relationships.

Peer contagion in child and adolescent social and emotional development

In this article, we examine the construct of peer contagion in childhood and adolescence and review studies of child and adolescent development that have identified peer contagion influences. Evidence suggests that children's interactions with peers are tied to increases in aggression in early and middle childhood and amplification of problem behaviors such as drug use, delinquency, and violence in early to late adolescence. Deviancy training is one mechanism that accounts for peer contagion effects on problem behaviors from age 5 through adolescence. In addition, we discuss peer contagion relevant to depression in adolescence, and corumination as an interactive process that may account for these effects. Social network analyses suggest that peer contagion underlies the influence of friendship on obesity, unhealthy body images, and expectations. Literature is reviewed that suggests how peer contagion effects can undermine the goals of public education from elementary school through college and impair the goals of juvenile corrections systems. In particular, programs that "select" adolescents at risk for aggregated preventive interventions are particularly vulnerable to peer contagion effects. It appears that a history of peer rejection is a vulnerability factor for influence by peers, and adult monitoring, supervision, positive parenting, structure, and self-regulation serve as protective factors.

Distinguishing Children Who Form New Best-Friendships from Those Who Do Not

Three groups were identified using best-friendship nominations at two time points surrounding the transition to middle school (Time 1: Spring of 5^th grade; Time 2: Fall of 6^th grade): (i) children who had no best-friendship at Time 1, but had a best-friendship at Time 2 (best-friendship gain; N=109); (ii) children who had no best-friendship at either Time 1 or 2 (chronically best-friendless; N=105); and (iii) children with a best-friendship at both Times 1 and 2, but with different peers at each time (best-friendship change; N=120). Peer nominations of social behaviors and victimization were collected at Times 1 and 2. Findings suggest that attraction to similar others, in addition to increased displays of prosocial behaviors, facilitate the formation of new best-friendships for both initially best-friendless and best-friended children.

Do they get what they want or are they stuck with what they can get? Testing homophily against default selection for friendships of highly aggressive boys. The TRAILS study

In this study a homophily selection hypothesis was tested against a default selection hypothesis, to answer whether preferred and realized friendships of highly aggressive boys differed. In a large peer-nomination sample, we assessed who highly overt aggressive, low prosocial boys (n = 181) nominated as friends (preferred friendships) and who among the nominated friends reciprocated the friendship (realized friendships). These preferred and realized friendships were compared with those of less aggressive (n = 1,268) and highly aggressive but also prosocial boys (bi-strategics; n = 55). Results showed that less aggressive boys preferred peers low on aggression, whereas highly aggressive and bi-strategic boys preferred peers not particular high or low on aggression. In line with default selection, highly aggressive boys ended up with aggressive peers even though that was not their preference. In general, received support proved an important determinant of highly aggressive, bi-strategic, and less aggressive boys' preferred and realized friendships. Especially highly aggressive boys preferred emotionally supportive friends, but ended up with the least supportive peers. In sum, for friendships of highly overt aggressive boys, the evidence favors default selection over homophily selection.

Who Dislikes Whom, and For Whom Does It Matter: Predicting Aggression in Middle Childhood

This study investigated the role of mutual dislike dyads (MDDs) in the development of aggressive behavior across the middle childhood years. Of particular interest was whether involvement in MDDs predicted later aggression, and whether the magnitude of the association between MDDs and later aggression varied based on characteristics of target children and 'others' involved in their MDDs. Data were collected on a community sample of 453 children participating in an ongoing longitudinal study. Classroom peer nomination and rating-scale measures were collected in kindergarten through third grade; aggressive behavior problems were assessed via teacher ratings in the early elementary years (kindergarten and first grade) and late elementary years (fourth and fifth grade). MDD involvement in the middle elementary years (second and third grade) was associated with higher levels of aggression in the late elementary years among boys (but not girls), and these predictions held after controlling for group-level peer disliking in the middle elementary years, aggression in the early elementary years, and demographic variables. The association between MDD involvement and subsequent aggression was also qualified by the aggressiveness of others in children's MDDs: Having more MDDs predicted later aggression only among boys whose MDDs involved mostly non-aggressive others.

Romantic partner selection and socialization during early adolescence

This prospective study examined romantic partner selection and socialization among a sample of 78 young adolescents (6th-8th graders). Independent assessments of adolescent and romantic partner adjustment were collected before and after relationships initiated via peer nomination and self-report. Prior to their relationship, adolescents and partners were significantly alike on popularity, physical attraction, and depressive symptoms. Controlling for initial similarity, partners' popularity, depressive symptoms, relational aggression, and relational victimization significantly predicted changes in adolescents' functioning in these areas over time. However, the magnitude and direction of change varied according to adolescents' and partners' prerelationship functioning. In general, adolescents who dated high-functioning partners changed more than those who dated low-functioning partners, and partner characteristics predicted greater change among low- versus high-functioning adolescents. Results were consistent even when controlling for best friend characteristics. The current findings are among the first to demonstrate unique contributions of romantic partner characteristics to adolescents' psychosocial functioning.

Testing an individual systems model of response evaluation and decision (RED) and antisocial behavior across adolescence

This study examined the bidirectional development of aggressive response evaluation and decision (RED) and antisocial behavior across five time points in adolescence. Participants (n = 522) were asked to imagine themselves behaving aggressively while viewing videotaped ambiguous provocations and answered a set of RED questions following each aggressive retaliation (administered at Grades 8 and 11 [13 and 16 years, respectively]). Self- and mother reports of antisocial behavior were collected at Grades 7, 9/10, and 12 (12, 14/15, and 17 years, respectively). Using structural equation modeling, the study found a partial mediating effect at each hypothesized mediational path despite high stability of antisocial behavior across adolescence. Findings are consistent with an individual systems perspective by which adolescents' antisocial conduct influences how they evaluate aggressive interpersonal behaviors, which affects their future antisocial conduct.