“…Nunes' et al (2012) The studies' subgroups were defined by the following categories. Firstly, most studies defined samples mainly by offence type: CCSO versus rapists (Eher et al, 1999), or versus Internet child sex offenders (ICSO) (Marshall, O'Brien, Marshall, Booth & Davis, 2012), or versus incarcerated non-sex offenders (Horley, Quinsey & Jones, 1997;Nunes et al, 2012). In one study, Eher et al (1999), sex offenders as a group were also divided according to violence level (high vs. low) (Wong, Lumsden, Fenton & Fenwick;1994).…”