“…Douglas and Skeem (2005) suggest that dynamic risk factors are: (1) antecedent to, and increase the propensity for, violence, (2) changeable, and, (3) predict changes in violent re-offending as a result of treatment. Many widely used structured violence risk assessment instruments comprise well-known dynamic risk factors (e.g., HistoricalClinical-Risk Management-20 version 3, HCR-20 v3 , Douglas, Hart, Webster & Belfrage, 2013;Violence Risk Scale, VRS , Wong & Gordon, 2003) and many of these dynamic risk factors are associated with violent recidivism, thereby satisfying Douglas and Skeem's (2005) first criteria; however, there is (1) little evidence that many of these dynamic risk factors can change in violent offenders (either over time or as a consequence of treatment), and (2) little research that has examined whether changes in dynamic risk factors are associated with reductions in violent re-offending following release from custody (Klepfisz, Daffern & Day, 2015). There is some support for the proposition that intra-individual change in dynamic risk factors is associated with reduced reoffending in prisoners (Serin, Lloyd, Helmus, Derkzen & Luong, 2013), and there is also evidence that reduction in aggregate dynamic risk factors measured using multi-item structured violence risk assessment instruments is associated with reduced violent recidivism in populations with SMI (De Vries Robbé, de Vogel, Douglas & Nijman, 2015;Lewis, Olver & Wong, 2012).…”