Preliminary studies with homeless youth find surprisingly pervasive social media use and suggest youths’ online interactions may be associated with their HIV-related risk and protective behaviors. As homeless youth are transient and difficult to engage in place-based services, social media may represent a novel venue for intervention. A critical first step in intervention development is gaining greater understanding of how homeless youth use social media especially as it relates to whom they connect to and around what topics. Given the salience of Social Networking Sites in the lives of these otherwise difficult to reach adolescents, and their potential to disseminate prevention interventions, this study assessed associations between online social networking technology use and HIV risk behaviors among homeless youth in Los Angeles, California. Homeless youth ages 13 through 24 (N=1046) were recruited through three drop-in centers and surveyed about their social media use and self-reported HIV-related risk behaviors. Results suggest that social media use is widely prevalent among this population, and the content of these online interactions is associated with whether or not they engage in risk or protective behaviors. Implications for interventions and further research are discussed.

Homeless youths' social networks are consistently linked with their substance use. Social networks influence behavior through several mechanisms, especially social norms. This study used sociometric analyses to understand whether social norms of drug use behaviors are clustered in network structures and whether these perceived norms (descriptive and injunctive) influence youths' drug use behaviors. An event-based approach was used to delineate boundaries of the two sociometric networks of homeless youth, one in Los Angeles, CA (n = 160) and the other in Santa Monica, CA (n = 130). Network characteristics included centrality (i.e., popularity) and cohesiveness (location in dense subnetworks). The primary outcome was recent methamphetamine use. Results revealed that both descriptive and injunctive norms influenced methamphetamine use. Network cohesion was found to be associated with perception of both descriptive and injunctive norms in both networks, however in opposite directions. Network interventions therefore might be effective if designed to capitalize on social influence that naturally occurs in cohesive parts of networks.

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Intimate partner violence (IPV) among homeless youth (HY) is common, yet it has continuously been understudied, especially in relation to substance use. As part of a longitudinal study of Los Angeles area HY, drop-in service seeking youth completed a self-administered questionnaire. The presented results are from the third panel of data collection ( N = 238), and the Revised Conflict Tactics Scale (CTS2) was used to assess IPV behavior regarding the participant's most recent intimate relationship. Approximately 38% of participants reported IPV behavior in their most recent relationship, and the majority of this behavior was bidirectional. It was unlikely that a HY was only a victim or only a perpetrator. Multivariable models revealed that bidirectional IPV was related to increased odds of recent methamphetamine; whereas sole perpetration was associated with an increased likelihood of ecstasy use. Specific substance use and IPV are closely related to risk behaviors for HY. Comprehensive interventions should be developed to address both these risk behaviors.