“…Research indicates that experiencing these traumas significantly increase the likelihood of perpetrating child abuse (Cunningham, 2003) and partner violence later in life (Ehrensaft et al, 2003;Stith et al, 2000;Swinford, DeMaris, Cernkovich, & Giordano, 2000;White & Widom, 2003;Wolfe, Wekerle, Scott, Straatman, & Grasley, 2004). However, some work indicates null effects, raising some doubts about the key assumptions of the cycle of violence (Ernst et al, 2007;Fergusson, Boden, & Horwood, 2006). For instance, using a prospective, longitudinal design of a New Zealand birth cohort, Fergusson et al (2006) found that while controlling for many social and contextual factors missing from previous studies, childhood exposure to partner violence did not increase the risk of being a perpetrator or a victim of partner violence.…”