Although recovery is complicated by physiological and psychological dependence, the intention and motivation of the abuser are critical parts of this process (Diclemente, C. C., p. 2, 1999). A popular perspective being used to understand the process of changing addictive behaviors is a model of intentional behavior change called the transtheoretical model. Transtheoretical model (also known as the stages- of- change theory) suggests that one of the major challenges in substance abuse treatment is to “creatively adapt to the complexities of change using a selection of change processes dependent upon individual’s readiness" (Diclemente, C. C., p. 2, 1999). In this model, there are three critical elements in the change process: stages, processes of change, and levels of change (Diclemente, C. C., p. 2, 1999). Using this framework, this research will examine patients', with Substance Abuse disorder, readiness to change upon detoxification admission and discharge. This examination is critical for UPMC Mercy Medical Detoxification unit’s treatment effectiveness as motivation level influences treatment engagement, retention, and outcomes and higher motivation for change prospectively predict greater reductions in substance…