Diffusion effects of a sexual violence prevention program leveraging youth-adult partnerships

A Latent Transition Model of the Effects of a Youth-Led Sexual Violence Prevention Initiative on Victimization and Perpetration Trajectories Over Time

PURPOSE

Latent transition analysis was used to characterize transitions over time in profiles of victimization and perpetration of sexual and related forms of violence (i.e., bullying, dating violence, sexual harassment) over a 2.5-year period among middle and high school students. We also examined how profiles of violence varied as a function of participation in a youth-led sexual violence prevention initiative (Youth Voices in Prevention [Youth VIP]).

METHODS

Participants were 2,528 youth (53.3% female, average age = 13.73 years) who completed a survey at five points (every six months) over three academic years (fall 2017-fall 2019). Participation in Youth VIP was tracked by researchers and took place from summer 2018 to fall 2019.

RESULTS

Four classes (i.e., low violence class, victimization only class, sexual harassment class, mixed violence class) best captured patterns of victimization and perpetration experiences. The latent transition analysis showed that the least severe class had the highest stability, with the fewest students transitioning out of this class over time. Results also demonstrated that, overall, participation in at least one Youth VIP event, compared to not participating in any Youth VIP events, related to positive transitions over time to less severe classes.

DISCUSSION

Violence experienced by youth is not homogenous, although classes of violence among youth are generally stable over a 2.5 period. Results also provide further evidence that Youth VIP is a promising approach to prevent sexual and related forms of violence and appears to promote transition into less severe classes of violence over time.

Prospective Associations Between Pornography Viewing and Sexual Aggression Among Adolescents

Adolescence is a critical period for sexuality development; this study examined prospective associations between pornography use and sexual aggression using a longitudinal study of middle and high school students surveyed five times across 3 years (mean age = 13.7 years at baseline; 53.2% female; 76.5% White; 21.0% Native American; 88.9% heterosexual). Across waves, 15.7%-29.0% of adolescents had viewed pornography in the past 6 months. Results indicated significant, reciprocal associations between pornography and sexual harassment perpetration that were stronger for male adolescents, and some significant associations between pornography use and subsequent sexual assault perpetration. Findings underscore the need to consider multiple theories of the link between pornography viewing and aggression and need for media literacy sexual education beginning in middle school.

The stability of youth popular opinion leaders selected over time using social network analysis

Community interventions that use social network analysis to identify and involve influential individuals are promising for behavior change. However, youth friendships are often unstable. The current study examined the stability of the youth selected as influential in a friendship social network, that is, the degree to which youth selected at one time point were also selected at subsequent time points. Influential youth, also called popular opinion leaders (POLs), were selected to be part of a community-wide sexual violence prevention initiative. POLs were selected based on high in-degree (number of times an individual was nominated as a best friend by another student). We found that POLs were unstable: only 29.81%-41.01% of POLs were stable across time. The percentage of POLs who were stable decreased across time. No factors (social identities, behavioral, attitudinal) consistently predicted POL stability. Although these findings are in need of replications, social network interventions for youth may need to repeatedly select new POLs to account for instability.