Dynamic weight status changes and peer lifestyles in early adolescence: A social network analysis on a longitudinal cohort of Taiwanese youth

BackgroundFriendship networks are relevant to adolescent weight status and lifestyle, but little is known about their relationship in an East Asian setting. Using a longitudinal cohort of Taiwanese adolescents, we studied how weight status and lifestyles might influence friendship. Simultaneously considering the influence of friendship networks, we further examined the effects of peers’ lifestyles on the body weight status of adolescents.MethodsData were retrieved from the first three waves of the Taiwan Youth Project (N = 2409; 51 % boys). Participants were asked to nominate their friends at school and to report their lifestyle factors (e.g. sleep habits, internet use, and athletic performance). Weight status was proxied by body mass index calculated from self-reported weight and height. Stochastic actor-based modeling was used for the friendship network analyses.ResultsConsidering network structure, adolescents selected friends based on similarities in weight status (β = 0.147 [standard error = 0.044], p < 0.001) and lifestyle factors, such as athletic performance (β = 0.181 [0.034], p < 0.001), internet use (β = 0.156 [0.039], p < 0.001), and social jetlag (β = 0.055 [ ± 0.022], p < 0.05). In the behavior dynamics model, we did not observe any peer influence on changes in adolescents’ weight status.ConclusionThese findings suggest a pervasive homophilic friendship selection explained by weight and lifestyle-based similarities, despite no evidence of peer influence on weight status. Stakeholders and care providers of adolescent health should be aware of the social network processes that underlie weight problems.     

Peer network influence on intimate partner violence perpetration among urban Tanzanian men

Male perpetration of intimate partner violence (IPV) against women in Tanzania is widespread. Theory and empirical evidence suggest peer networks may play an important role in shaping IPV perpetration, although research on this topic in sub-Saharan Africa is limited. Grounded in social learning theory, social influence theory, and the theory of gender and power, the purpose of this study was to examine whether and how peer networks influence men’s perpetration of IPV in Dar es Salaam, Tanzania. We conducted in-depth interviews (n = 40) with a sub-sample of 20 men enrolled in the control condition of an ongoing cluster-randomised controlled trial. We purposively sampled participants who previously reported perpetrating physical IPV. To analyse the data, we generated narrative summaries and conducted thematic and interpretative coding. We saw no evidence that men self-selected into peer networks with certain values or behaviours. Rather, men described several mechanisms through which their peers influenced the perpetration of IPV, including: (1) the internalisation of peer network norms, (2) pressure to conform to peer network norms and (3) the direct involvement of peers in shaping couple power dynamics. Our findings suggest that peer networks influence men’s perpetration of IPV and should be targeted in future programmes and interventions.     

Risks and Benefits of Adolescent Girls’ Participation in Online Sexting Survey Research

The increasingly ubiquitous use of sexting among adolescent girls underscores the importance of empirical data on their sexting behaviors, motivations, and outcomes. To date, the majority of sexting studies have been conducted online; however, little is known about the extent to which responding to such socially sensitive questions may cause participant discomfort or distress. Research on this question is critical since in the absence of empirical data, institutional review boards (IRBs) may permit or place restrictions on online sexting studies based on an under- or overestimation of adolescent participation risk. The current online study asked 210 girls (aged 14–18 years, 55% non-Hispanic White, with sexting experience in the past 12 months) who previously registered to take online surveys on (1) their anticipated comfort in responding to a sexting survey include items on sexting motivations, positive and negative sexting consequences, and related sexual behaviors; (2) their perceptions of sexting research benefits/harms; and (3) comfort discussing similar topics in everyday life and with health professionals. Overall, participants were comfortable responding to sexting survey questions, rated sexting research as high benefits and low risks, and felt about the same as or more comfortable completing a sexting survey than discussing similar topics with peers, parents, or healthcare professionals. Findings suggest that anonymous online sexting studies can be classified as minimal risk research for adolescent girls and provide empirical support for IRB decisions to waive guardian permission for participation in such studies.

     

African-American and Hispanic adolescents’ intentions to delay first intercourse: parental communication as a buffer for sexually active peers

PurposeParents and peers often create conflicting influences on adolescent sexual delay. This study examines the moderating effects of mothers’ responsiveness during sex discussions on the negative relationship between sexually active peers and sexual delay among African-American and Hispanic adolescents.MethodsInterview data from 530 African-American and Hispanic non–sexually active high school students were used to examine the effects of mother-adolescent sex discussions and peer norms on intentions to delay or initiate intercourse within the next year. Logistic regression was performed to test the moderating effects of adolescents’ reports of mothers’ responsiveness (openness, comfort, and understanding during sex discussions) on the relationship between perceived peer sexual activity and adolescent sexual delay.ResultsThe relationship between mothers’ responsiveness during sex discussions, peer sexual activity, and their effects on adolescent sexual delay is complex. Mother’s responsiveness had a buffering effect on the negative effects of sexually active peers. Among adolescents who perceived a high percentage of their peers to be sexually active, those who reported that their mothers had above-average responsiveness were 1.6 times more likely to plan to delay intercourse than were adolescents who reported that their mothers had average responsiveness.ConclusionsParents and peers are mutually contingent influences in the dynamic social context of adolescents’ lives. Although sexually active peers have a negative effect on adolescent sexual delay, responsive parent-adolescent sex discussions can buffer these effects. Intervention efforts can help parents develop the knowledge and communication skills they need to discuss sexual topics with their children effectively.     

Gender differences in the prediction of condom use among incarcerated juvenile offenders: testing the information-motivation-behavior skills (IMB) model

PurposeTo validate the predictive value of the Information-Motivation-Behavioral Skills (IMB) model of human immunodeficiency virus (HIV) prevention for sexually active juvenile offenders and to explore gender differences in IMB model constructs for condom-protected vaginal intercourse.MethodsSelf-report measures of acquired immune deficiency syndrome (AIDS) knowledge, pro-condom peer influence, risk perception, condom attitudes, condom use self-efficacy, frequency of vaginal intercourse, and frequency condom-protected vaginal intercourse were collected from predominantly African-American adolescent detainees. Analysis consisted of structural equation models for the combined sample (N = 523) and for separate gender groups (328 males and 195 females).ResultsIn the combined model, condom use was significantly predicted by male gender, peer influence, positive condom attitudes, and condom self-efficacy. In separate gender analyses, condom use among adolescent males was predicted by peer influence (modestly) and by positive condom attitudes, whereas condom use among females was predicted by peer influence, self-efficacy, and condom attitudes. Compared with males, females reported significantly greater knowledge, less peer influence, higher perceived risk for infection, more positive condom attitudes, and more self-efficacy, but they reported less condom use.ConclusionsFemales may find it difficult to use condoms consistently despite their awareness of their efficacy. Power imbalances or other dynamics operating in their relationships with males need further exploration. Gender differences in the relationship between condom self-efficacy and condom use were masked in the analysis of the total sample, indicating the value of testing theories of HIV prevention separately by gender.     

Gender and age differences in associations between peer dieting and drive for thinness

OBJECTIVE: To examine associations between peer dieting and drive for thinness (DT) in men and women of three age groups and to compare rates of perceived vs. reported peer dieting. METHOD: Data came from an epidemiological study in which surveys were completed by women (n = 1,468) and men (n = 592) from three age groups: late adolescent (mean +/- SD age: 20.0 +/- 1.6 years), adult (30.0 +/- 1.6), and midlife (40.1 +/- 2.0). RESULTS: Significant associations were found between perceived peer dieting and DT in women and men. For women, associations were strongest in late adolescents for same-sex peers. Associations in men did not differ by age group or peer sex. Expected gender differences in the strength of associations were not found. Reported dieting occurred at or below rates perceived for peers. CONCLUSION: Results may partially account for why DT has been found to decline with age in women, but not men. Longitudinal research is needed to support cross-sectional findings.     

Is Depression Contagious? A Test of Alternative Peer Socialization Mechanisms of Depressive Symptoms in Adolescent Peer Networks

PurposeThis study examined the role of two different types of peer socialization (convergence, contagion) in adolescents' depression, adjusting for the effects of peer selection and deselection.MethodsThe sample used in this study comprised 949 Finnish adolescents (56% females; mean age: 16 years at the outset) attending classrooms in eight secondary schools. Participants identified three school peers and reported depressive symptoms twice, 1 year apart. Sociometric and behavioral data were analyzed using dynamic social network analysis.ResultsAdolescents initiated relationships with peers who reported similar levels of depression before initiation of the relationship, and dissolved relationships with peers who became dissimilar in depression from time 1 (T1) to time 2 (T2). The average score of peers' depressive symptoms at T1 predicted changes in adolescent depression at T2 (convergence), but adolescents with peers who reported relatively higher initial levels of depression did not report an increase in depression (contagion).ConclusionsOver time, adolescents' depressive symptoms increasingly converged toward the average levels of their peers, but this convergence was not primarily because of contagion effects. The findings suggest that socialization processes can lead to both increases and decreases in adolescent depression, depending on peers' average level of depression.     

Sexting,Substance Use,and Sexual Risk Behavior in Young Adults

PurposeCell phone use has become more widespread over the past decade. Young adults are frequently early adopters of new technologies, including cell phones. Most previous research examining sexting, the act of sending sexually explicit or suggestive images via text message, has focused on the legal or social consequences of this behavior. The current study focused on the public health implications of sexting by examining associations between sexting, substance use, and sexual risk behavior in youth.MethodsYoung adults (N = 763) completed online questionnaires assessing demographics, cell phone use (e.g., texting, sexting), substance use, and sexual risk behaviors.ResultsSexting was reported by a substantial minority of participants (44%). Compared with their nonsexting counterparts, participants who engaged in sexting were more likely to report recent substance use and high-risk sexual behaviors, including unprotected sex and sex with multiple partners. Of those who engaged in sexting, a considerable percentage (31.8%) reported having sex with a new partner for the first time after sexting with that person. In multivariate analyses, sexting was associated with high-risk sexual behavior, after accounting for demographic factors, total texting behaviors, and substance use.ConclusionsResults suggest that sexting is robustly associated with high-risk sexual behavior. Many individuals exchange explicit or provocative photos with long-term sexual partners, but at least some participants in this study were incurring new sexual risks after sexting. Additional research is needed to understand the contexts in which sexting occurs, motivations for sexting, and relationship of sexting to risk behavior.     

Risk and Protective Factors Distinguishing Profiles of Adolescent Peer and Dating Violence Perpetration

PurposeViolence profiles were created on the basis of whether adolescents used violence against both peers and dates, against dates but not peers, against peers but not dates, or against neither peers nor dates. We determined (1) whether risk and protective factors from five domains (individual attributes and behaviors, the peer, family, school, and neighborhood contexts), based primarily on social learning and social control theories, were associated with violence profiles, (2) whether factors distinguishing profiles varied by gender, and (3) which of the domains was most important in distinguishing profiles.MethodsData are from adolescents in grades 8 through 10 from schools in three nonmetropolitan Counties (n = 2,907).ResultsAdolescents who used violence against both peers and dates used more of each type of violence compared with those who used only one type of violence. They also had more maladaptive risk and protective scores than adolescents perpetrating only peer violence or neither type of violence, although they had few differences from those perpetrating only dating violence. Most social learning theory risk factors and social control theory protective factors distinguished the profiles as did psychological attributes and substance use. Factors distinguishing profile membership were generally the same for boys and girls, although some associations were stronger for boys than for girls. The model fit statistics suggest that the individual attributes and behaviors and the peer context models fit the data the best.ConclusionsSuggestions for developing theoretically based interventions for preventing both peer and dating violence are presented.     

The Effects of Race,Gender, and Gender-Typed Behavior on Children’s Friendship Appraisals

From a young age, children’s peer appraisals are influenced by the social categories to which peers belong based on factors such as race and gender. To date, research regarding the manner in which race- and gender-related factors might interact to influence these appraisals has been limited. The present study employed an experimental vignette paradigm to investigate the relative influences of target peers’ race, gender, and gender-typed behavior toward 4- to 6-year-old Chinese children’s (N?=?119, 62 girls, 57 boys) peer appraisals. Appraisals were assessed via (1) a rating scale measuring children’s interest in being friends with a range of hypothetical target peers varying in race, gender, and gender-typed behavior, and (2) a forced-choice rank-order task in which children indicated their preferences for four hypothetical target peers who varied from themselves on either race, gender, or gender-typed behavior, or were similar to themselves on all three traits. There was little evidence to suggest children’s rank-ordered peer preferences in relation to race were influenced by whether the other-race presented was White (preferred relatively more) or Black (preferred relatively less). In contrast, gender-related factors (i.e., rater gender, target gender, target gender-typed behavior) had more robust influences on peer preferences for both outcome measures. Gender-conforming peers were preferred over gender-nonconforming peers, and target boys displaying feminine behavior were less preferred than target girls displaying masculine behavior. The results help characterize cross-cultural (in)consistencies in children’s social preferences in relation to peers’ race and gender.

     

A Cross-Country Network Analysis of Adolescent Resilience

PurposeIn situations of adversity, young people draw on individual, relational, and contextual (community and cultural) resources to foster their resilience. Recent literature defines resilience as a capacity that is underpinned by a network of interrelated resources. Although empirical studies show evidence of the value of a network approach, little is known regarding how different country contexts influence which resources are most critical within a resource network and how resources interact for adolescent resilience.MethodsNetwork analysis was conducted with data from studies that had used the Child and Youth Resilience Measure. Regularized partial correlation networks of 17 resources were estimated for 14 countries (Botswana, Canada, China, Colombia, Equatorial Guinea, India, Indonesia, Italy, Jordan, New Zealand, the Philippines, Romania, South Africa, and Syrian refugees living in Jordan). The sample size was 18,914 (mean age = 15.70 years, 48.8% female).ResultsWe observed mostly positive associations between the resources of interest. The salience and strength of associations between resources varied by country. The most central resource across countries was having supportive caregivers during stressful times because this resource had the most and strongest positive associations with other resources.ConclusionsThis study gives first empirical evidence from multiple countries that an interplay of social–ecological resources (such as individual skills, peer, caregiver and community support, and educational aspirations and opportunities) matter for adolescent resilience. Across countries, caregiver support appears to be most central for adolescent resilience. Future resilience interventions might apply this network approach to identify important, contextually relevant resources that likely foster additional resources.     

A Comparison of Peer Influence Measures as Predictors of Smoking Among Predominately Hispanic/Latino High School Adolescents

PurposeConsistent evidence has shown that one of the most significant influences on adolescent smoking is peer influence. There is considerable variation, however, in how peer influence is measured. This study constructs social network influence and selection variables from egocentric and sociometric data to compare their associations with smoking, with considerations of perceived smoking norms and adolescent popularity.MethodsLongitudinal data were collected in the 9th and 10th grades in October 2006 and 2007 from predominantly Hispanic/Latino adolescents in seven Southern California schools; among these adolescents, 1,950 completed surveys at both waves. Both cross-sectional (separately for 9th and 10th graders) and longitudinal models were estimated.ResultsAn egocentric measure of perceived friend smoking was strongly and consistently associated with individual smoking (adjusted odds ratio [AOR] ≈ 1.80, p < .001), whereas its sociometric counterpart of friend self-report smoking was only associated with smoking in the 9th-grade cross-sectional models (e.g., AOR = 1.56, p < .001) and rarely in longitudinal models. Popularity, measured by proportion of nominations received by class size, was associated with smoking and becoming a smoker (AOR = 1.67, p < .001), whereas perceived norms were not, in longitudinal models. Friend selection was also associated with becoming a smoker (AOR = 1.32, p = .05).ConclusionsThis study illustrates the utility of egocentric data for understanding peer influence and underscores the importance of perceptions and popularity as mechanisms that influence adolescent smoking.     

Peer Influence on Marijuana Use in Different Types of Friendships

PurposeAlthough several social network studies have demonstrated peer influence effects on adolescent substance use, findings for marijuana use have been equivocal. This study examines whether structural features of friendships moderate friends' influence on adolescent marijuana use over time.MethodsUsing 1-year longitudinal data from the National Longitudinal Study of Adolescent Health, this article examines whether three structural features of friendships moderate friends' influence on adolescent marijuana use: whether the friendship is reciprocated, the popularity of the nominated friend, and the popularity/status difference between the nominated friend and the adolescent. The sample consists of students in grade 10/11 at wave I, who were in grade 11/12 at wave II, from two large schools with complete grade-based friendship network data (N = 1,612).ResultsIn one school, friends' influence on marijuana use was more likely to occur within mutual, reciprocated friendships compared with nonreciprocated relationships. In the other school, friends' influence was stronger when the friends were relatively popular within the school setting or much more popular than the adolescents themselves.ConclusionsFriends' influence on youth marijuana use may play out in different ways, depending on the school context. In one school, influence occurred predominantly within reciprocated relationships that are likely characterized by closeness and trust, whereas in the other school adopting friends' drug use behaviors appeared to be a strategy to attain social status. Further research is needed to better understand the conditions under which structural features of friendships moderate friends' influence on adolescent marijuana use.     

Family and friend closeness to adolescent sexual partners in relationship to condom use

PurposeThe role of closeness of sexual partners to family and friends (i.e., how well the participant’s family and friends knew their primary sexual partner) to a variety of relationship and sexual behavior measures was explored.MethodsA sample of 151 adolescent females (aged 14–17 years) was assessed. Areas assessed include family and friend closeness, relationship intimacy, length of sexual relationship, and condom use.ResultsBivariate correlations indicated that the integration of the sexual partner into the family and friend networks was related to greater relationship intimacy. Lowered condom use was related to a number of measures, including increased relationship intimacy and increased family closeness. A path analysis was conducted to assess for direct and indirect effects of family closeness, friend closeness, relationship length, and relationship intimacy on condom use. Social network closeness in family and friend networks was implicated in lowered condom use through higher relationship intimacy within adolescent dyads.ConclusionsSocial network theory is useful in understanding adolescent health-related behavior. In particular, the integration of adolescent sexual partners into both family and friend networks is related to the expression of adolescent sexual behavior.     

Do Parents Still Matter? The Impact of Parents and Peers on Adolescent Electronic Cigarette Use

PurposeVaping among adolescents has reached epidemic levels. Identifying factors associated with electronic cigarette (e-cigarette) use initiation could inform prevention programming. This study examined whether parental attitudes toward e-cigarettes impacted adolescent e-cigarette use intentions, positive expectancies of use, and actual use when accounting for adolescent attitudes and peer norms. Parents' negative attitudes toward e-cigarettes were expected to reduce teen e-cigarette use intentions. Low e-cigarette use intentions were expected to mediate the association between parental attitudes and teen e-cigarette use. Peer norms were expected to be associated with positive expectancies. Positive expectancies were expected to mediate the association between peer norms and teen e-cigarette use.MethodsA sample of e-cigarette naïve adolescents (n = 176, aged 14–17 years, 52% female, 82% Latinx/Hispanic) and their parents were assessed. Parents and adolescents rated harm associated with e-cigarette use. Adolescents reported their perceptions of peer e-cigarette norms, intentions, positive expectancies, and e-cigarette use. Cross-sectional models were estimated for e-cigarette use intentions and positive expectancies. Prospective mediation models (n = 142) characterized pathways to e-cigarette use.ResultsParents' attitudes toward e-cigarettes were associated with weaker intentions. Intentions mediated the association between parental attitudes and e-cigarette use. Adolescents reporting favorable e-cigarette peer norms endorsed more positive expectancies. Positive expectancies did not mediate the association between peer norms and e-cigarette use.ConclusionsParents actively shape adolescent e-cigarette use even when accounting for peer norms and adolescent attitudes. Involving parents in prevention programming may help reduce vaping among teens. These associations should be examined with a larger and more diverse sample.     

Sociodemographic and substance use characteristics associated with typologies and composition of social support networks among youth experiencing homelessness in Los Angeles,USA

Youth experiencing homelessness are a vulnerable population with increased behavioural health risks. Social networks are a consistent correlate of youths’ substance use behaviours. However, less is known about the reciprocal relationships among these constructs. This study classified youth experiencing homelessness according to their social support network type (e.g. instrumental, emotional, service) and composition (e.g. family, peers, service staff) and linked their membership in these social network classes to sociodemographic and substance use characteristics. Four waves of cross‐sectional data were collected between October 2011 and June 2013 from youth experiencing homelessness, ages 14–29, at three drop‐in centres in Los Angeles, CA (N = 1,046). This study employed latent class analysis to identify subgroups of youth experiencing homelessness according to the type and composition of their social support networks. Multinomial logistic regression analyses were then conducted to identify the sociodemographic and substance use characteristics associated with social support network class membership. Five latent classes of youths’ social support networks were identified: (a) high staff emotional and service support; (b) high home‐based peer and family emotional, service and instrumental support; (c) moderate street‐ and home‐based peer emotional support; (d) low or no support and (e) high home‐based peer and family emotional and instrumental support. Multinomial logistic regression models indicated that race/ethnicity, gender, sexual orientation, literal homelessness, former foster care experience, depression, heroin and marijuana use were significant correlates of social support network class membership. Results indicate distinct classes of social support networks among youth experiencing homelessness, with certain sociodemographic and substance use characteristics implicated in youths’ social networks.     

Explaining Associations between Adolescent Substance Use and Condom Use

PurposeThis study examined different explanations for associations between adolescent substance use and lower condom use, in terms of the event-specific effects of alcohol or drugs, psychosocial factors, and sexual behaviors (intercourse frequency, greater number of partners and pill use).MethodsPupils from 25 schools in Scotland, UK provided data on use of alcohol, tobacco, cannabis and psychosocial factors at ages 14 and 16 years; and sexual behaviors at age 16 years. Logistic regression was used to examine associations between substance use and condom use in those reporting intercourse more than once (n = 1322), adjusting for explanatory variables.ResultsRegular use of any of the three substances at age 14 or 16 was associated with lower condom use at age 16, adjusting for gender and social background. The greatest attenuation of the substance use odds ratios was achieved by adjusting for all behaviors and psychosocial factors. This finding applied to different substance use groups, although cigarette-only and alcohol-only groups at age 16 differed in the relative importance of being “drunk or stoned” to other factors explaining condom use.ConclusionsAmong adolescent substance users, being “drunk or stoned” at intercourse was only one factor related to not using condoms. Psychosocial factors (including attitudes to sexual risks and peer sexual norms) and having more sexual partners also explained substance users’ condom use, with lesser effects due to greater intercourse frequency and pill use. Multiple explanations for substance use/condom use associations may guide counseling and education services.     

Social and Romantic Outcomes in Emerging Adulthood Among Survivors of Childhood Cancer

PurposeTo examine social and romantic outcomes among survivors of childhood cancer and comparison peers during the transition from adolescence to emerging adulthood.MethodsFamilies were recruited when the children with cancer were 8–15-years-old and on initial treatment for a malignancy that did not primarily affect the central nervous system (i.e., non-CNS). At that time, each child with cancer was matched to a classmate of similar age, gender, and race for inclusion in a comparison group. For the current follow-up (7.29 years post-diagnosis), 56 survivors, 60 comparison peers, and their parents completed questionnaires after the youth’s 18th birthday. Severity of treatment and late effects were rated by health care providers.ResultsSurvivors and comparison peers were similar on a variety of outcomes, including family background, social self-concept, social competence, family relationships, friendships, and romantic relationships. Mothers reported that survivors engaged in fewer activities than comparison peers. The proportion of participants who lived with their parents, were dating, and expressed plans to marry or have children was similar between groups. Initial treatment intensity, time since diagnosis, and severity of late effects were associated with some indices of social adjustment.ConclusionsThe social and romantic outcomes of survivors of non-CNS cancer were similar to comparison peers during the transition from adolescence to emerging adulthood. Disease and treatment factors had limited associations with outcomes. Clinical interventions to assist social development may not be necessary for all survivors, but additional research is needed to identify subgroups at risk for difficulties.     

The Impact of Family and Peer Protective Factors on Girls’ Violence Perpetration and Victimization

PurposeThis study investigates whether family and peer connections and prosocial norms buffer adolescent girls’ violence involvement and whether a youth development intervention augments the power of these protective factors in reducing girls’ risk for violence.MethodsData were obtained from 253 13–17-year-olds enrolled in a randomized controlled trial of Prime Time, a youth development intervention offered through urban clinic settings to girls at high risk for pregnancy. Participants completed an audio computer-assisted self-interview survey at baseline and 6, 12, and 18 months after enrollment. Protective factors included scales assessing family and peer connections and prosocial norms. Outcome variables were violence victimization and perpetration scales measured at 18 months.ResultsFamily connections and prosocial norms independently protected girls against violence involvement. Peer prosocial norms also served as a protective buffer against violence perpetration and victimization; however, girls with strong peer connections had higher levels of violence perpetration. Participation in Prime Time augmented the protective effects of family and peer connections on girls’ violence victimization but not perpetration. Prime Time participants who had high levels of family connections reported the lowest levels of violence victimization at 18 months. Prime Time participants with strong peer connections trended toward lower levels of violence victimization than other girls.ConclusionsResults suggest that effects of the Prime Time intervention on violence victimization were optimized among high-risk adolescent girls with strong connections to family and peers. The intervention was most potent in preventing violence victimization among girls with strong prosocial connections to family and peers.     

Testing three explanations of the emergence of weapon carrying in peer context: the roles of aggression, victimization, and the social network

PurposeTo examine the relative contribution of weapon carrying of peers, aggression, and victimization to weapon carrying of male and female adolescents over time.MethodsData were derived from a population-based sample of male (N = 224) and female (N = 244) adolescents followed from grade 10 (M age = 15.5) to grade 11 (M age = 16.5). Peer networks were derived from best friend nominations. Self-reports were used to assess weapon carrying. Aggression and victimization were assessed using both self- and peer-reports. Use of dynamic social network modeling (SIENA) allowed prediction of weapon carrying in grade 11 as a function of weapon carrying of befriended peers, aggression, and victimization in grade 10, while selection processes and structural network effects (reciprocity and transitivity) were controlled for.ResultsPeer influence processes accounted for changes in weapon carrying over time. Self-reported victimization decreased weapon carrying 1 year later. Peer-reported victimization increased the likelihood of weapon carrying, particularly for highly aggressive adolescents. Boys were more likely to carry weapons than girls, but the processes associated with weapon carrying did not differ for boys and girls.ConclusionsThese findings revealed that, in this population-based sample, weapon carrying of best friends, as well as aggression, contributed to the proliferation of weapons in friendship networks, suggesting processes of peer contagion as well as individual vulnerability to weapon carrying.