Group size does matter: differences among sexual assaults committed by lone, double, and groups of three or more perpetrators

Abstract

We compared a total of 340 sexual assault cases based on offender characteristics, victim characteristics, and offence behaviours to identify differences among sexual assaults committed by lone, double, and groups of three or more perpetrators in South Korea. Several differences were found among sexual assaults committed by varying numbers of offenders. First, lone, double, and groups of three or more perpetrators differed with respect to age, marital status, and employment status. Second, substantial differences in victim characteristics were observed with respect to age and the victim-offender (v-o) relationship. Third, significant differences in offence behaviours, including offence type, planning, method of approach, knife possession, and stealing property, were found. Furthermore, we identified several variables that significantly predict group size using logistic regression analyses. The study has theoretical implications for understanding how group dynamics influence the behaviours of rape perpetrators, and practical implications for victim treatment and offender intervention.