Specific violent acts are "catalyzed" by stressful environment circumstances, with less stress required to catalyze violence in individuals with greater violence predisposition. Some early work has supported this view (e.g. Ferguson et al., 2008). Recent research with inmates has, likewise, provided support for the catalyst model.[8] Specifically, as suggested by the catalyst model, perpetrators of crimes sometimes included stylistic elements or behaviors in their crimes they had seen in media, but the motivation to commit crimes itself was unrelated to media viewing.