Social networks and violence victimization and perpetration among youth: A longitudinal analysis

Interpersonal violence (IV) is a serious concern for adolescents in the United States that has devastating impacts for individuals and communities. Given the increased importance placed on friendships during adolescence, the purpose of the current study was to examine the extent to which IV experiences cluster within youths' friendship networks. Participants were students (N = 1303) in grades 7th to 10th who completed surveys at the beginning and end of an academic year. Results showed that friends' average perpetration (i.e., the percentage of the friends they nominated who perpetrated IV) was strongly associated with likelihood of individual perpetration at baseline but not at the follow-up. For victimization, friends' average report of victimization (i.e., the percentage of the friends they nominated who were victimized) was associated with higher likelihood reporting of victimization (at both baseline and follow-up). Although future research is needed to understand explanatory mechanisms underlying these findings, it is possible that the effectiveness of prevention initiatives may be enhanced by incorporating peer group information.

Perceived safety in community and service settings among young adults experiencing homelessness: Differences by sexual and gender identity

Homelessness poses risks to the health and safety of young adults; particularly among sexual and gender minority (SGM) young adults. The current study sought to better understand service use and perceived safety in community and service settings among SGM and cisgender heterosexual (cis-hetero) young adults experiencing homelessness. Data come from a mixed-method, ecological momentary assessment study (n = 80; 43% sexual minority; 10% gender minority) in Los Angeles, California. Participants reported their current location (service vs. nonservice setting) and perceived safety. Multilevel modeling examined associations between identity, location, and perceived safety; qualitative interviews with 20 SGM participants added context to quantitative findings. Overall, service location was associated with greater perceived safety (β = .27, p < .001). Compared to cis-hetero participants, cisgender sexual minorities (β = -.23, p = .03) and sexual and gender minorities (β = -.50, p = .002) reported lower perceived safety in service settings (vs. nonservice settings). Qualitative interviews revealed themes and subthemes detailing safe/unsafe spaces and interpersonal conflict in the community, and relationships with staff, peers, transphobia, and positive experiences in service settings.

Systematic review: Rates of psychopathology, substance misuse, and neuropsychological dysfunction among transitional age youth experiencing homelessness

BACKGROUND AND OBJECTIVES

Transitional age youth experiencing homelessness (TAY-EH) bear a disproportionate burden of morbidity and mortality related to psychopathology, substance use disorders (SUD), and neuropsychological dysfunction. Prior reviews examining these conditions are now nearly a decade old, have focused on younger adolescent populations, or have utilized nonsystematic approaches. To our knowledge, no prior reviews have reported on all three of these domains in an integrated fashion. Here, we provide a contemporary, critical synthesis of the literature on the functioning of TAY-EH in North America within these three domains.

METHODS

Based upon PRISMA guidelines, a search of PubMed, Medline, and PsycInfo databases was conducted, including literature published between January 2015 and June 2021.

RESULTS

The initial search yielded 2024 citations; 104 underwent full text review and 32 met inclusion criteria, with a final aggregate sample size of 13,516. Studies revealed elevated rates of mood disorders, PTSD, anxiety disorders, and alcohol misuse. There is insufficient data to draw generalizable conclusions regarding neuropsychological functioning, other SUD, or other psychiatric diagnoses. No studies reported on co-occurrence of disorders among or between the domains of psychopathology, SUD, and neuropsychological dysfunction. Four studies used structured interviews for diagnoses, with the remainder relying upon brief screeners or self-report measures.

CONCLUSIONS AND SCIENTIFIC SIGNIFICANCE

To our knowledge, this is the first systematic review to provide integrated findings on psychopathology, SUD, and neuropsychological dysfunction among TAY-EH. Further research using structured, DSM-based tools is needed to characterize rates of single and co-occurring conditions to inform tailored treatment interventions.

Adolescent Peers and Prevention: Network Patterns of Sexual Violence Attitudes and Bystander Actions

Peer sexual violence is a significant social problem that affects adolescents and can lead to negative mental health and developmental consequences. Peers are a significant source of influence for adolescent behavior. For example, recent studies show training teens to be bystanders can be an effective prevention strategy to reduce peer violence and harassment. Peers can also promote risky behaviors including substance use and violence. The current study examined how sexual violence-specific risk and protective attitudes (e.g., denial of peer sexual violence and positive peer prevention norms) and behaviors (alcohol use and bystander actions to prevent peer sexual violence) clustered within peer networks cross-sectionally and over time. Participants were 1,499 7th-10th graders who took surveys during an academic year and who reported having opportunity to take action as bystanders to peer sexual violence. Participants took surveys 6 months apart online in schools. Questions included nomination of best friends to capture information about peer networks. Social network analyses indicated that there was weak but significant clustering of positive prevention attitudes such as bystander denial and marginal clustering on reactive bystander behaviors to address sexual assault. For comparison, alcohol use and academic grades were analyzed and found to also cluster in networks in these data. These findings suggest that for early adolescents, peer bystander training may be influential for some key bystander attitudes and reactive sexual violence prevention behaviors as individual behaviors are not independent of those of their friends.

MYPATH: A novel mindfulness and yoga-based peer leader intervention to prevent violence among youth experiencing homelessness

Young adults experiencing homelessness (YAEH) are at elevated risk for violence victimization and perpetration. However, there are no evidence-based violence prevention interventions for homeless populations. This study is an evaluation of a novel mindfulness-based peer-leader intervention designed to reduce violence and improve mindfulness in YAEH. A social network of YAEH receiving services at a drop-in agency was recruited in Summer 2018 (n = 106) and peer-leaders identified at baseline (n = 12). Peer leaders were trained in mindfulness and yoga skills during a 1-day intensive workshop and seven 1-h weekly follow-up workshops and encouraged to share their knowledge with in-network peers. Postintervention data were collected 2 and 3 months after baseline. Two one-way repeated-measures analyses of variance (ANOVAs) tested differences in means for mindfulness and fighting. ANOVA models showed significant increases in group mean mindfulness F(2, 110) = 3.42, p < 0.05 and significant decreases in group mean violent behavior F(2, 112) = 5.23, p < 0.01 at the network level. Findings indicate a network-based, peer-leader model can be effective for influencing complex, socially conditioned attitudes and behaviors among YAEH. Additional advantages of the peer-leader model include relatively few direct-service person-hours required from providers and convenience to participants able practice skills in their relevant social contexts.

Marketized Mentality, Street Codes and Violence

The article examines the recent individual level extensions to Institutional Anomie Theory. It explores if a marketized mentality is important to the development of a violent street code that encourages violence as a method of self-enhancement, as well as a factor directly leading to violence. Further, it investigates if the impact of the marketized mentality on violence is moderated by risk-taking and violent peers. It controls for other important factors associated with violence including physical abuse, homelessness, violent victimization, and social bonds. The research utilizes self-report data from interviews with 400 Canadian homeless youth aged 16-24. Results from the OLS regressions indicated that a marketized mentality, along with risk-taking, violent peers, violent victimization, and social bonds predicted levels of support for the street code. The marketized mentality had a direct effect on violence, as well as an indirect effect through the street code. The effect of marketized mentality on violence was also stronger at higher levels of risk-taking and violent peer association. Physical abuse, violent victimization, risk-taking, and violent peers also had direct effects on violence. The findings suggest that a marketized mentality can be adopted even in economically marginal populations leading to the development of violent strategies to fulfill goals. Avenues for future research are offered.

Examining HIV Risk and Exchange Sex Among Current and Formerly Homeless Young Adults

This study investigated HIV risk among homeless and formerly homeless young adults by examining risky sex behaviors (e.g., condomless sex, exchange sex, and sex with multiple persons) using 90-day and daily recall methods. Data came from a sample of young adults (aged 18–27) with current (n = 101) or past (n = 109) homelessness experience in Los Angeles, California, recruited between 2017 and 2019. Baseline surveys queried demographics and sexual history. Daily retrospective surveys queried sexual events. Multiple logistic regressions were used to test the effects of demographic characteristics including homelessness history, relationship status, substance use, and sexual history on risky sex outcomes. In this sample, 26% reported never using a condom during anal or vaginal sex in the past 90 days, 5% reported testing positive for HIV, 82% had limited to no knowledge of preexposure prophylaxis, and 8% reported having had exchange sex during a 7-day measurement period, with those experiencing homelessness more likely to report. The study suggests supportive housing can reduce the occurrence of exchange sex but that HIV prevention services are still needed in homeless and housing programs to promote safe sexual practices.

Can Better Emotion Regulation Protect Against Interpersonal Violence in Homeless Youth Social Networks?

Homeless youth experience all types of violence at higher rates than their housed counterparts. This is typically the result of many contributing factors including childhood experiences of trauma, subsistence survival strategies, and exposure to perpetrators while living on the streets. Reducing violence in the lives of homeless youth is imperative and can contribute to a young person's ability to safely and successfully exit the streets and lead a long and productive life in society. However, developing public health and social interventions to reduce violence in adolescent and young adult populations is difficult due to the complex interplay of extrinsic and intrinsic drivers of this phenomenon. Los Angeles area homeless youth (N = 366) were asked questions regarding recent violence experiences, emotion regulation, and their social network. Multivariable logistic regressions tested the overall effect of emotion regulation on violence, controlling for age, gender, race, sexual identity, experience of childhood abuse, and data collection site. In this sample, 56% of youth endorsed fighting in the previous year, and those who reported more difficulties with emotion regulation were significantly more likely to fight. In addition, youth who scored below the mean on difficulties with regulation and belonged to networks characterized by low-difficulty peers were 60% less likely to report fighting. Emotion regulation skills represent a malleable target for intervention that may contribute to reduced propensity for violence in this population. Implications for network-based interventions to improve individual emotion regulation and reduce overall violence among homeless youth and other at-risk populations are discussed.

Incarceration history, social network composition, and substance use among homeless youth in Los Angeles

Background: Homeless youth in the United States have high rates of substance use. Existing research has identified social network composition and street-associated stressors as contributing factors. Incarceration is a highly prevalent stressor for homeless youth. Its effect on youth's social network composition and substance use, however, has been neglected. Aims: This study investigated the direct and indirect associations between incarceration history and substance use (through social networks) among homeless youth in Los Angeles, California. Methods: A sample of 1047 homeless youths were recruited between 2011 and 2013. Computerized self-administrated surveys and social network interviews were conducted to collect youth's sociodemographic characteristics, incarceration history, social network composition, and substance use. Bootstrapping was used to identify the direct and indirect associations between youth's incarceration history and substance use. Results: Incarceration history was positively associated with youth's cannabis, methamphetamine, and injection drug use. The percentage of cannabis-using peers partially mediated the associations between incarceration history and youth's cannabis, cocaine, and heroin use. The percentage of methamphetamine-using peers partially mediated the associations between incarceration history and youth's methamphetamine, cocaine, and injection drug use. The percentage of heroin-using peers partially mediated the association between incarceration history and youth's heroin use. Moreover, the percentage of peers who inject drugs partially mediated the associations between incarceration history and youth's methamphetamine, heroin, and injection drug use. Discussion: Incarceration history should be taken to a more central place in future research and practice with homeless youth in the United States.