1. Prochaska
J. O.
& Velicer
W. F. (1997). The Transtheoretical Model of Health Behavior Change. American Journal of Health Promotion
12(1)
38–48. In this foundational article
the Contemplation stage is defined as the period where individuals "are aware that a problem exists and are seriously thinking about overcoming it but have not yet made a commitment to take action" (p. 39).
2. Boston University School of Public Health. (n.d.). The Transtheoretical Model (Stages of Change). Behavioral and Social Sciences. Retrieved from https://sphweb.bumc.bu.edu/otlt/mph-modules/sb/behavioralchangetheories/behavioralchangetheories6.html. The courseware defines the Contemplation stage as when a person "is intending to start the healthy behavior within the next 6 months" and is more aware of the pros of changing but also acutely aware of the cons. The scenario's team is weighing these options.
3. Lenio
J. A. (2006). The Transtheoretical Model of Behavior Change: A Guide for the Addictions Field. The Journal of Addictions Nursing
17(3)
149-156. https://doi.org/10.1080/10884600600855383. This review describes the Preparation stage as involving the development of "a realistic plan of action
" which the team in the scenario has not yet reached (p. 151).