“…Unlike criminal history, more criminal thinking has been consistently reported to be predictive of poor treatment engagement and deficient client functioning (Best, Day, Campbell, Flynn, & Simpson, 2009; Garner, Knight, Flynn, Morey, & Simpson, 2007). A study by Joe, Rowan-Szal, Greener, Simpson, and Vance (2010) assessing the efficacy of in-prison treatment for male methamphetamine abusers demonstrated that criminal thinking predicts treatment engagement better than other variables, including psychosocial functioning.…”