​Stages of ChangeIndividuals dealing with addiction go through times of apprehension to begin recovery.  Determining such willingness is seen in the Stages of Change model.  The Stages of Change is "a model or theory that would help to address the problem of how to match an individual’s treatment to his or her commitment to change and personal journey through the process of change." (Connor, DiClemente, Velasquez, and Donovan, 1982 pg. 6)   Designing a treatment plan based on the individuals stage of change will help to determine the steps to help them to enter into recovery action.  The Stages of Change model below "describes dimensions of the change process in terms of stages and also describes how coping activities or processes of change interact with these stages." (Connor, DiClemente, Velasquez, and Donovan, 1982 pg. 6) 

Source: ​Connors, Gerard J.; DiClemente, Carlo C.; Velasquez, Mary Marden; Donovan, Dennis M.. Substance Abuse Treatment and the Stages of Change, Second Edition: Selecting and Planning Interventions . Guilford Publications. 
DiClemente (1982, 1984, 1992) “stages-of-change”