Groups of Sexual Violence Perpetration in a National Sample of Youth 13-25 Years of Age.

Little is known about how specific forms of sexual violence (SV) perpetration group together and how youth transition between these groups over time. Between 2011 and 2016, four waves of data were collected online nationally from 1129 13-25-year-olds. Six forms of SV perpetration were assessed: sexual harassment, online sexual harassment, sexual assault, coercive sex, attempted rape, and rape. We used latent class analysis to examine how different types of SV perpetration behaviors clustered together in each of the four waves. Latent transition analysis was used to examine stability and instability in group membership between the first and fourth waves assessed. Three groups were identified in each of the four waves of data collection: (1) a "non-perpetrators" group, ranging from 69 to 81% (n: 775-912) across waves, (2) a "sexual harassment" group, ranging from 17 to 29% (n: 191-327), and (3) a "multiple perpetration" group that engaged in all types of SV perpetration, ranging from 1 to 3% (n: 12-28). Most youth persisted in their behavior over time, which was true for each of the three groups (ranging between 60 and 72%). Desistence was less common, ranging from 35% of those who transitioned from sexual harassment to non-perpetration to 20% for those who transitioned from multiple perpetration to sexual harassment, and from multiple perpetration to non-perpetration. Escalation was least common, ranging from 2% who transitioned from non-perpetration to multiple perpetration to 26% who transitioned from non-perpetration to sexual harassment. Youth who perpetrate SV are heterogeneous; SV perpetration is not persistent for all youth.